Product Information

IQS231A-00000000-CSR

Product Image X-ON

Datasheet
Capacitive Touch Sensors Cap/Prox Controller for SAR Applications
Manufacturer: Azoteq



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Manufacturer
Azoteq
Product Category
Capacitive Touch Sensors
RoHS - XON
Y Icon ROHS
Number of Channels
1 Channel
Package / Case
WLCSP - 8
Height
0.35 mm
Length
1.47 mm
Packaging
Cut Tape
Series
Iqs231a
Termination Style
Smd/Smt
Width
0.88 mm
Brand
Azoteq
Interface Type
I2 C
Sensor Type
Controller
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 20 C
Operating Supply Voltage
1.75 V To 3.3 V
Product Type
Touch Sensors
Factory Pack Quantity :
3000
Subcategory
Sensors
Supply Voltage - Max
3.3 V
Supply Voltage - Min
1.75 V
Tradename
Proxsense
Cnhts
9031809090
Hts Code
8542310001
Mxhts
85423102
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? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series ? Table of Contents 1 SUMMARY: PACKAGING AND PIN-OUT (TSOT23-6 & DFN10) ............................................................................. 4 2 SUMMARY: PACKAGE AND PIN-OUT (WLCSP) .................................................................................................... 5 3 REFERENCE SCHEMATICS: ................................................................................................................................... 6 4 SUMMARY: ONE-TIME-PROGRAMMABLE (OTP) OPTIONS ................................................................................. 8 2 5 SUMMARY: PROGRAMMING REFERENCE (I C MEMORY MAP) ........................................................................... 9 6 FUNCTIONAL BLOCK DIAGRAM .........................................................................................................................10 7 SUMMARY: FEATURES .......................................................................................................................................11 PIN COMPATIBILITY ............................................................................................................................................................ 11 DYCAL / QUICK RELEASE .................................................................................................................................................... 11 CONTROL IN RF ENVIRONMENTS .......................................................................................................................................... 11 ADVANCED TEMPERATURE & INTERFERENCE COMPENSATION ..................................................................................................... 11 USER INTERFACE SELECTION ................................................................................................................................................. 11 MOVEMENT DETECTION ..................................................................................................................................................... 12 SENSITIVITY ADJUSTMENT.................................................................................................................................................... 12 FAILSAFE HEARTBEAT .......................................................................................................................................................... 12 HIGH CONFIGURABILITY ...................................................................................................................................................... 12 2 SWITCH I C TO STANDALONE ............................................................................................................................................... 12 SYNC INPUT ...................................................................................................................................................................... 13 AUTOMATIC TUNING (ATI).................................................................................................................................................. 13 REFERENCE SIGNAL BEHAVIOUR ............................................................................................................................................ 13 2 IMPROVED I C INTERFACE ................................................................................................................................................... 13 8 FEATURES: EXTENDED DETAILS .........................................................................................................................14 8.1 ATI (AUTOMATIC TUNING IMPLEMENTATION) ........................................................................................................... 14 8.2 SENSITIVITY ADJUSTMENT ...................................................................................................................................... 14 2 9 I C PROGRAMMING GUIDE (SUMMARY) ...........................................................................................................15 9.1 ADD I2C CONNECTION .......................................................................................................................................... 15 9.2 I2C COMMAND STRUCTURE .................................................................................................................................... 15 9.3 CONTROL BYTE .................................................................................................................................................... 16 9.4 TEST MODE (ADDRESS 0X45) .................................................................................................................................. 16 9.5 I2C TYPICAL SETUP ............................................................................................................................................... 16 9.6 I2C READ (EVENT REGISTER) ................................................................................................................................... 16 9.7 I2C POLLING AND SENSING TIMING .......................................................................................................................... 17 9.8 MOVEMENT TIME-OUT ACCURACY ........................................................................................................................... 17 9.9 SAMPLING FREQUENCY VS SENSING FREQUENCY ......................................................................................................... 17 10 CONFIGURATION OPTIONS................................................................................................................................19 10.1 OTP DETAILS: BANK 0 .......................................................................................................................................... 19 MOVEMENT TIME-OUT ....................................................................................................................................................... 19 MOVEMENT THRESHOLD ..................................................................................................................................................... 19 QUICK RELEASE THRESHOLD ................................................................................................................................................. 19 QUICK RELEASE BETA .......................................................................................................................................................... 19 10.2 OTP DETAILS: BANK 1 .......................................................................................................................................... 20 IC MODE.......................................................................................................................................................................... 20 PROXIMITY THRESHOLD (LOW/HIGH) .................................................................................................................................... 20 AC FILTER ........................................................................................................................................................................ 20 TOUCH THRESHOLD ............................................................................................................................................................ 20 10.3 OTP DETAILS: BANK 2 .......................................................................................................................................... 20 INCREASE DEBOUNCE ......................................................................................................................................................... 20 TARGET ........................................................................................................................................................................... 20 BASE VALUE ..................................................................................................................................................................... 20 FAILSAFE .......................................................................................................................................................................... 21 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 2 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series ? Table of Contents 1 SUMMARY: PACKAGING AND PIN-OUT (TSOT23-6 & DFN10) ............................................................................. 4 2 SUMMARY: PACKAGE AND PIN-OUT (WLCSP) .................................................................................................... 5 3 REFERENCE SCHEMATICS: ................................................................................................................................... 6 4 SUMMARY: ONE-TIME-PROGRAMMABLE (OTP) OPTIONS ................................................................................. 8 2 5 SUMMARY: PROGRAMMING REFERENCE (I C MEMORY MAP) ........................................................................... 9 6 FUNCTIONAL BLOCK DIAGRAM .........................................................................................................................10 7 SUMMARY: FEATURES .......................................................................................................................................11 PIN COMPATIBILITY ............................................................................................................................................................ 11 DYCAL / QUICK RELEASE .................................................................................................................................................... 11 CONTROL IN RF ENVIRONMENTS .......................................................................................................................................... 11 ADVANCED TEMPERATURE & INTERFERENCE COMPENSATION ..................................................................................................... 11 USER INTERFACE SELECTION ................................................................................................................................................. 11 MOVEMENT DETECTION ..................................................................................................................................................... 12 SENSITIVITY ADJUSTMENT.................................................................................................................................................... 12 FAILSAFE HEARTBEAT .......................................................................................................................................................... 12 HIGH CONFIGURABILITY ...................................................................................................................................................... 12 2 SWITCH I C TO STANDALONE ............................................................................................................................................... 12 SYNC INPUT ...................................................................................................................................................................... 13 AUTOMATIC TUNING (ATI).................................................................................................................................................. 13 REFERENCE SIGNAL BEHAVIOUR ............................................................................................................................................ 13 2 IMPROVED I C INTERFACE ................................................................................................................................................... 13 8 FEATURES: EXTENDED DETAILS .........................................................................................................................14 8.1 ATI (AUTOMATIC TUNING IMPLEMENTATION) ........................................................................................................... 14 8.2 SENSITIVITY ADJUSTMENT ...................................................................................................................................... 14 2 9 I C PROGRAMMING GUIDE (SUMMARY) ...........................................................................................................15 9.1 ADD I2C CONNECTION .......................................................................................................................................... 15 9.2 I2C COMMAND STRUCTURE .................................................................................................................................... 15 9.3 CONTROL BYTE .................................................................................................................................................... 16 9.4 TEST MODE (ADDRESS 0X45) .................................................................................................................................. 16 9.5 I2C TYPICAL SETUP ............................................................................................................................................... 16 9.6 I2C READ (EVENT REGISTER) ................................................................................................................................... 16 9.7 I2C POLLING AND SENSING TIMING .......................................................................................................................... 17 9.8 MOVEMENT TIME-OUT ACCURACY ........................................................................................................................... 17 9.9 SAMPLING FREQUENCY VS SENSING FREQUENCY ......................................................................................................... 17 10 CONFIGURATION OPTIONS................................................................................................................................19 10.1 OTP DETAILS: BANK 0 .......................................................................................................................................... 19 MOVEMENT TIME-OUT ....................................................................................................................................................... 19 MOVEMENT THRESHOLD ..................................................................................................................................................... 19 QUICK RELEASE THRESHOLD ................................................................................................................................................. 19 QUICK RELEASE BETA .......................................................................................................................................................... 19 10.2 OTP DETAILS: BANK 1 .......................................................................................................................................... 20 IC MODE.......................................................................................................................................................................... 20 PROXIMITY THRESHOLD (LOW/HIGH) .................................................................................................................................... 20 AC FILTER ........................................................................................................................................................................ 20 TOUCH THRESHOLD ............................................................................................................................................................ 20 10.3 OTP DETAILS: BANK 2 .......................................................................................................................................... 20 INCREASE DEBOUNCE ......................................................................................................................................................... 20 TARGET ........................................................................................................................................................................... 20 BASE VALUE ..................................................................................................................................................................... 20 FAILSAFE .......................................................................................................................................................................... 21 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 2 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series QUICK RELEASE ................................................................................................................................................................. 22 USER INTERFACE ............................................................................................................................................................... 22 10.4 OTP DETAILS: BANK 3 .......................................................................................................................................... 24 IO2 FUNCTION .................................................................................................................................................................. 24 ATI EVENTS ON IO1........................................................................................................................................................... 24 SAMPLE RATE ................................................................................................................................................................... 24 11 FULL PROGRAMMING REFERENCE .....................................................................................................................25 12 SPECIFICATIONS ................................................................................................................................................31 12.1 ABSOLUTE MAXIMUM RATINGS ............................................................................................................................... 31 13 PACKAGE INFORMATION ..................................................................................................................................34 13.1 TSOT23-6 ......................................................................................................................................................... 34 13.2 DFN-10............................................................................................................................................................. 35 13.3 WLCSP-8 .......................................................................................................................................................... 37 14 ORDERING AND PART-NUMBER INFORMATION ................................................................................................38 14.1 ORDERING INFORMATION ...................................................................................................................................... 38 14.2 DEVICE NUMBERING CONVENTION ? TSOT23-6 ....................................................................................................... 38 14.2.1 Top .......................................................................................................................................................... 38 14.2.2 Bottom .................................................................................................................................................... 38 14.3 DEVICE NUMBERING CONVENTION: 8-PIN WLCSP...................................................................................................... 39 14.3.1 Top .......................................................................................................................................................... 39 14.3.2 Bottom .................................................................................................................................................... 39 14.4 DEVICE NUMBERING CONVENTION ? DFN10 ............................................................................................................ 39 15 REVISION HISTORY ............................................................................................................................................40 APPENDIX A CONTACT INFORMATION ..................................................................................................................41 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 3 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series ? Table of Contents 1 SUMMARY: PACKAGING AND PIN-OUT (TSOT23-6 & DFN10) ............................................................................. 4 2 SUMMARY: PACKAGE AND PIN-OUT (WLCSP) .................................................................................................... 5 3 REFERENCE SCHEMATICS: ................................................................................................................................... 6 4 SUMMARY: ONE-TIME-PROGRAMMABLE (OTP) OPTIONS ................................................................................. 8 2 5 SUMMARY: PROGRAMMING REFERENCE (I C MEMORY MAP) ........................................................................... 9 6 FUNCTIONAL BLOCK DIAGRAM .........................................................................................................................10 7 SUMMARY: FEATURES .......................................................................................................................................11 PIN COMPATIBILITY ............................................................................................................................................................ 11 DYCAL / QUICK RELEASE .................................................................................................................................................... 11 CONTROL IN RF ENVIRONMENTS .......................................................................................................................................... 11 ADVANCED TEMPERATURE & INTERFERENCE COMPENSATION ..................................................................................................... 11 USER INTERFACE SELECTION ................................................................................................................................................. 11 MOVEMENT DETECTION ..................................................................................................................................................... 12 SENSITIVITY ADJUSTMENT.................................................................................................................................................... 12 FAILSAFE HEARTBEAT .......................................................................................................................................................... 12 HIGH CONFIGURABILITY ...................................................................................................................................................... 12 2 SWITCH I C TO STANDALONE ............................................................................................................................................... 12 SYNC INPUT ...................................................................................................................................................................... 13 AUTOMATIC TUNING (ATI).................................................................................................................................................. 13 REFERENCE SIGNAL BEHAVIOUR ............................................................................................................................................ 13 2 IMPROVED I C INTERFACE ................................................................................................................................................... 13 8 FEATURES: EXTENDED DETAILS .........................................................................................................................14 8.1 ATI (AUTOMATIC TUNING IMPLEMENTATION) ........................................................................................................... 14 8.2 SENSITIVITY ADJUSTMENT ...................................................................................................................................... 14 2 9 I C PROGRAMMING GUIDE (SUMMARY) ...........................................................................................................15 9.1 ADD I2C CONNECTION .......................................................................................................................................... 15 9.2 I2C COMMAND STRUCTURE .................................................................................................................................... 15 9.3 CONTROL BYTE .................................................................................................................................................... 16 9.4 TEST MODE (ADDRESS 0X45) .................................................................................................................................. 16 9.5 I2C TYPICAL SETUP ............................................................................................................................................... 16 9.6 I2C READ (EVENT REGISTER) ................................................................................................................................... 16 9.7 I2C POLLING AND SENSING TIMING .......................................................................................................................... 17 9.8 MOVEMENT TIME-OUT ACCURACY ........................................................................................................................... 17 9.9 SAMPLING FREQUENCY VS SENSING FREQUENCY ......................................................................................................... 17 10 CONFIGURATION OPTIONS................................................................................................................................19 10.1 OTP DETAILS: BANK 0 .......................................................................................................................................... 19 MOVEMENT TIME-OUT ....................................................................................................................................................... 19 MOVEMENT THRESHOLD ..................................................................................................................................................... 19 QUICK RELEASE THRESHOLD ................................................................................................................................................. 19 QUICK RELEASE BETA .......................................................................................................................................................... 19 10.2 OTP DETAILS: BANK 1 .......................................................................................................................................... 20 IC MODE.......................................................................................................................................................................... 20 PROXIMITY THRESHOLD (LOW/HIGH) .................................................................................................................................... 20 AC FILTER ........................................................................................................................................................................ 20 TOUCH THRESHOLD ............................................................................................................................................................ 20 10.3 OTP DETAILS: BANK 2 .......................................................................................................................................... 20 INCREASE DEBOUNCE ......................................................................................................................................................... 20 TARGET ........................................................................................................................................................................... 20 BASE VALUE ..................................................................................................................................................................... 20 FAILSAFE .......................................................................................................................................................................... 21 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 2 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series IQS231A Datasheet Single Channel Capacitive Proximity/Touch Controller for SAR applications The IQS231A ProxSense? IC is a self-capacitance controller designed for applications where an awake/activate on proximity function is required. The IQS231A is an ultra-low power solution that uses unique release and/or movement detection for applications that require long- term detection. The IQS231A operates standalone or I2C and features configuration via OTP (One Time Programmable) bits. Switching from I2C to standalone during runtime is also possible in order to access all settings while offering the simplicity of a standalone output. Features ? Integrated SAR user interface offering a RoHS2 Compliant 6 pin TSOT23-6 simple GPIO output ? Quick release detection ? effectively 8 pin WLCSP-8 prevent false triggers ? Quick release sensitivity options ? Wide range of control for sensing in high power RF environments 10 pin DFN-10 ? Pin compatible with IQS128 and IQS229 Representations only, not actual markings ? 1.8V to 3.3V Input voltage 2 ? Capacitive resolution down to 0.02fF ? Extended controls in I C mode (setup in 2 ? Capacitive load capability up to 200pF I C, runtime with standalone output) ? External threshold adjustment pin ? Optional input for synchronized (minimize need for pre-empted OTP implementations (input to instruct IC when adjustments) to sense) ? Minimal external components (direct ? Synchronization output ? failsafe pulses input strap) may be used by the master to synchronize on. Sensing is done after each pulse ? Standalone failsafe mode (backwards compatible failsafe output, short pulses ? Synchronization input ? Sensing is only on output to indicate operational device) done while Sync input is low ? Default OTP options focus on safety ? Low power sensing: 30Hz (default), 100Hz, and passing SAR lab qualification, 8Hz, 4Hz (sub 6uA mode) OTP changes offer performance ? Constant sampling rates during all power advantages modes with rapidly debounced output ? I2C interface option (improved changes compatibility) ? Advanced temperature & interference compensation option Applications ? SAR sensor ? Hold detection for screen activation ? Integrated hybrid designs (RF and ? On-ear detection capacitive sensing combined) ? Movement sensing applications (user interaction detection, anti-theft) Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 1 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series ? Table of Contents 1 SUMMARY: PACKAGING AND PIN-OUT (TSOT23-6 & DFN10) ............................................................................. 4 2 SUMMARY: PACKAGE AND PIN-OUT (WLCSP) .................................................................................................... 5 3 REFERENCE SCHEMATICS: ................................................................................................................................... 6 4 SUMMARY: ONE-TIME-PROGRAMMABLE (OTP) OPTIONS ................................................................................. 8 2 5 SUMMARY: PROGRAMMING REFERENCE (I C MEMORY MAP) ........................................................................... 9 6 FUNCTIONAL BLOCK DIAGRAM .........................................................................................................................10 7 SUMMARY: FEATURES .......................................................................................................................................11 PIN COMPATIBILITY ............................................................................................................................................................ 11 DYCAL / QUICK RELEASE .................................................................................................................................................... 11 CONTROL IN RF ENVIRONMENTS .......................................................................................................................................... 11 ADVANCED TEMPERATURE & INTERFERENCE COMPENSATION ..................................................................................................... 11 USER INTERFACE SELECTION ................................................................................................................................................. 11 MOVEMENT DETECTION ..................................................................................................................................................... 12 SENSITIVITY ADJUSTMENT.................................................................................................................................................... 12 FAILSAFE HEARTBEAT .......................................................................................................................................................... 12 HIGH CONFIGURABILITY ...................................................................................................................................................... 12 2 SWITCH I C TO STANDALONE ............................................................................................................................................... 12 SYNC INPUT ...................................................................................................................................................................... 13 AUTOMATIC TUNING (ATI).................................................................................................................................................. 13 REFERENCE SIGNAL BEHAVIOUR ............................................................................................................................................ 13 2 IMPROVED I C INTERFACE ................................................................................................................................................... 13 8 FEATURES: EXTENDED DETAILS .........................................................................................................................14 8.1 ATI (AUTOMATIC TUNING IMPLEMENTATION) ........................................................................................................... 14 8.2 SENSITIVITY ADJUSTMENT ...................................................................................................................................... 14 2 9 I C PROGRAMMING GUIDE (SUMMARY) ...........................................................................................................15 9.1 ADD I2C CONNECTION .......................................................................................................................................... 15 9.2 I2C COMMAND STRUCTURE .................................................................................................................................... 15 9.3 CONTROL BYTE .................................................................................................................................................... 16 9.4 TEST MODE (ADDRESS 0X45) .................................................................................................................................. 16 9.5 I2C TYPICAL SETUP ............................................................................................................................................... 16 9.6 I2C READ (EVENT REGISTER) ................................................................................................................................... 16 9.7 I2C POLLING AND SENSING TIMING .......................................................................................................................... 17 9.8 MOVEMENT TIME-OUT ACCURACY ........................................................................................................................... 17 9.9 SAMPLING FREQUENCY VS SENSING FREQUENCY ......................................................................................................... 17 10 CONFIGURATION OPTIONS................................................................................................................................19 10.1 OTP DETAILS: BANK 0 .......................................................................................................................................... 19 MOVEMENT TIME-OUT ....................................................................................................................................................... 19 MOVEMENT THRESHOLD ..................................................................................................................................................... 19 QUICK RELEASE THRESHOLD ................................................................................................................................................. 19 QUICK RELEASE BETA .......................................................................................................................................................... 19 10.2 OTP DETAILS: BANK 1 .......................................................................................................................................... 20 IC MODE.......................................................................................................................................................................... 20 PROXIMITY THRESHOLD (LOW/HIGH) .................................................................................................................................... 20 AC FILTER ........................................................................................................................................................................ 20 TOUCH THRESHOLD ............................................................................................................................................................ 20 10.3 OTP DETAILS: BANK 2 .......................................................................................................................................... 20 INCREASE DEBOUNCE ......................................................................................................................................................... 20 TARGET ........................................................................................................................................................................... 20 BASE VALUE ..................................................................................................................................................................... 20 FAILSAFE .......................................................................................................................................................................... 21 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 2 of 41 All Rights Reserved Check for latest datasheet November 2017 ? ProxSense Series QUICK RELEASE ................................................................................................................................................................. 22 USER INTERFACE ............................................................................................................................................................... 22 10.4 OTP DETAILS: BANK 3 .......................................................................................................................................... 24 IO2 FUNCTION .................................................................................................................................................................. 24 ATI EVENTS ON IO1........................................................................................................................................................... 24 SAMPLE RATE ................................................................................................................................................................... 24 11 FULL PROGRAMMING REFERENCE .....................................................................................................................25 12 SPECIFICATIONS ................................................................................................................................................31 12.1 ABSOLUTE MAXIMUM RATINGS ............................................................................................................................... 31 13 PACKAGE INFORMATION ..................................................................................................................................34 13.1 TSOT23-6 ......................................................................................................................................................... 34 13.2 DFN-10............................................................................................................................................................. 35 13.3 WLCSP-8 .......................................................................................................................................................... 37 14 ORDERING AND PART-NUMBER INFORMATION ................................................................................................38 14.1 ORDERING INFORMATION ...................................................................................................................................... 38 14.2 DEVICE NUMBERING CONVENTION ? TSOT23-6 ....................................................................................................... 38 14.2.1 Top .......................................................................................................................................................... 38 14.2.2 Bottom .................................................................................................................................................... 38 14.3 DEVICE NUMBERING CONVENTION: 8-PIN WLCSP...................................................................................................... 39 14.3.1 Top .......................................................................................................................................................... 39 14.3.2 Bottom .................................................................................................................................................... 39 14.4 DEVICE NUMBERING CONVENTION ? DFN10 ............................................................................................................ 39 15 REVISION HISTORY ............................................................................................................................................40 APPENDIX A CONTACT INFORMATION ..................................................................................................................41 Copyright ? Azoteq 2017 IQS231A Datasheet v1.8 Page 3 of 41 All Rights Reserved Check for latest datasheet November 2017

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