12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)LTC2309
ABs OL etu M Ax IMu M RAt In Gs (Notes 1, 2)
Supply Voltage
Power Dissipation .............................................. 500mW
V .......................................................... ?0.3V to 6V
Operating TemperatureR ange
DD
Analog InputV oltage( Note 3)
LTC2309C ................................................ 0?C to 70?C
CH0-CH7,CO M,V ,
LTC2309I .............................................?40?C to 85?C
REF
REFCOMP .................... (GND ?0 .3V) to (V + 0.3V)
LTC2309H .......................................... ?40?C to 125?C
DD
DigitalI nputV oltage
Storage TemperatureR ange .................. ?65?C to 150?C
(Note3 ) ............................ (GND ? 0.3V) to (V +0 .3V)
Lead Temperature (Soldering, 10s ec)
DD
Digital Output Voltage ...... (GND ?0 .3V) to (V +0 .3V)
TSSOP ..............................................................300?C
DD
Ip n C On FIGu RAt IOn
TOP VIEW
TOP VIEW
REFCOMP 1 20 V
REF
24 23 22 21 20 19
GND 2 19 COM
CH3 1 18 GND
V 3 18 CH7
DD
CH4 2 17 SDA
AD0 4 17 CH6
CH5 3 16 SCL
25
AD1 5 16 CH5
CH6 4 15 AD1
SCL 6 15 CH4
CH7 5 14 AD0
SDA 7 14 CH3
COM 6 13 V
DD
GND 8 13 CH2
7 8 9 10 11 12
GND 9 12 CH1
V 10 11 CH0
DD
F PACKAGE
UF PACKAGE
20-LEAD PLASTIC TSSOP
24-LEAD (4mm s 4mm) PLASTIC QFN
T = 150?C, ? =90?C/W , ? = 20?C/W
JMAX JA JC
T = 150?C, ? = 37?C/W
JMAX JA
EXPOSED PAD(PIN 25) IS GND, MUSTBE SOLDERED TOPCB
ORDe R In FORMAt IOn
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2309CUF#PBF LTC2309CUF#TRPBF 2309 0?C to 70?C
24-Lead(4mm ? 4mm)Plastic QFN
LTC2309IUF#PBF LTC2309IUF#TRPBF 2309 24-Lead (4mm ?4mm) Plastic QFN ?40?C to 85?C
LTC2309CF#PBF LTC2309CF#TRPBF LTC2309F 20-Lead Plastic TSSOP 0?C to 70?C
LTC2309IF#PBF LTC2309IF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 85?C
LTC2309HF#PBF LTC2309HF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 125?C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information onnon-standard lead based finish parts.
Formore information onlead free part marking, go to: http://www.linear.com/leadfree/
For moreinformation on tape and reelspecifications, go to: http://www.linear.com/tapeandreel/
2309fd
V CH2
REF
REFCOMP CH1
GND CH0
GND V
DD
GND GND
V GND
DD12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)LTC2309
ABs OL etu M Ax IMu M RAt In Gs (Notes 1, 2)
Supply Voltage
Power Dissipation .............................................. 500mW
V .......................................................... ?0.3V to 6V
Operating TemperatureR ange
DD
Analog InputV oltage( Note 3)
LTC2309C ................................................ 0?C to 70?C
CH0-CH7,CO M,V ,
LTC2309I .............................................?40?C to 85?C
REF
REFCOMP .................... (GND ?0 .3V) to (V + 0.3V)
LTC2309H .......................................... ?40?C to 125?C
DD
DigitalI nputV oltage
Storage TemperatureR ange .................. ?65?C to 150?C
(Note3 ) ............................ (GND ? 0.3V) to (V +0 .3V)
Lead Temperature (Soldering, 10s ec)
DD
Digital Output Voltage ...... (GND ?0 .3V) to (V +0 .3V)
TSSOP ..............................................................300?C
DD
Ip n C On FIGu RAt IOn
TOP VIEW
TOP VIEW
REFCOMP 1 20 V
REF
24 23 22 21 20 19
GND 2 19 COM
CH3 1 18 GND
V 3 18 CH7
DD
CH4 2 17 SDA
AD0 4 17 CH6
CH5 3 16 SCL
25
AD1 5 16 CH5
CH6 4 15 AD1
SCL 6 15 CH4
CH7 5 14 AD0
SDA 7 14 CH3
COM 6 13 V
DD
GND 8 13 CH2
7 8 9 10 11 12
GND 9 12 CH1
V 10 11 CH0
DD
F PACKAGE
UF PACKAGE
20-LEAD PLASTIC TSSOP
24-LEAD (4mm s 4mm) PLASTIC QFN
T = 150?C, ? =90?C/W , ? = 20?C/W
JMAX JA JC
T = 150?C, ? = 37?C/W
JMAX JA
EXPOSED PAD(PIN 25) IS GND, MUSTBE SOLDERED TOPCB
ORDe R In FORMAt IOn
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2309CUF#PBF LTC2309CUF#TRPBF 2309 0?C to 70?C
24-Lead(4mm ? 4mm)Plastic QFN
LTC2309IUF#PBF LTC2309IUF#TRPBF 2309 24-Lead (4mm ?4mm) Plastic QFN ?40?C to 85?C
LTC2309CF#PBF LTC2309CF#TRPBF LTC2309F 20-Lead Plastic TSSOP 0?C to 70?C
LTC2309IF#PBF LTC2309IF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 85?C
LTC2309HF#PBF LTC2309HF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 125?C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information onnon-standard lead based finish parts.
Formore information onlead free part marking, go to: http://www.linear.com/leadfree/
For moreinformation on tape and reelspecifications, go to: http://www.linear.com/tapeandreel/
2309fd
V CH2
REF
REFCOMP CH1
GND CH0
GND V
DD
GND GND
V GND
DDLTC2309
C On Ve Ret R An D Mu Lt Ip Lexe R CHARACet RIts ICs The l denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at T = 25?C. (Notes 4, 5)
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No MissingCodes) l 12 Bits
l
Integral Linearity Error (Note 6) ?0.45 ?1 LSB
Differential Linearity Error l ?0.35 ?1 LSB
l
BipolarZero Error (Note7) ?1 ?8 LSB
BipolarZero Error Drift 0.002 LSB/?C
BipolarZero Error Match ?0.1 ?3 LSB
l
UnipolarZero Error (Note 7) ?0.4 ?6 LSB
UnipolarZero Error Drift 0.002 LSB/?C
UnipolarZero Error Match ?0.2 ?1 LSB
Bipolar Full-ScaleError External Reference (Note 8) l ?0.5 ?10 LSB
REFCOMP =4.096V l ?0.4 ?9 LSB
BipolarFull-Scale ErrorDrift ExternalReference 0.05 LSB/?C
BipolarFull-Scale Error Match ?0.4 ?3 LSB
l
Unipolar Full-Scale Error QFNExternal Reference (Note 8) ?0.4 ?10 LSB
l
TSSOPExternal Reference(Note 8) ?0.5 ?12 LSB
REFCOMP = 4.096V l ?0.3 ?6 LSB
UnipolarFull-Scale Error Drift External Reference 0.05 LSB/?C
Unipolar Full-Scale ErrorMatch ?0.3 ?2 LSB
A n ALOG Itupn The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T = 25?C. (Note 4)
A
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
+
l
V AbsoluteInput Range (CH0 to CH7) (Note9) ?0.05 REFCOMP V
IN
?
V Absolute Input Range (CH0 to CH7, COM) Unipolar(Note 9) l ?0.05 0.25 ? REFCOMP V
IN
Bipolar (Note 9) l ?0.05 0.75 ? REFCOMP V
+ ? + ?
l
V ? V InputDifferential VoltageRange V = V ? V (Unipolar) 0to REFCOMP V
IN IN IN IN IN
+ ?
l
V = V ? V (Bipolar) ?REFCOMP/2 V
IN IN IN
I AnalogInput Leakage Current l ?1 ?A
IN
C AnalogInput Capacitance SampleMode 55 pF
IN
Hold Mode 5 pF
CMRR InputCommon Mode Rejection Ratio 70 dB
D Yn AMIC ACCu RACY The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T = 25?C. A = ?1dBFS. (Notes 4, 10)
A IN
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
l
SINAD Signal-to-(Noise + Distortion) Ratio f = 1kHz 71 73.3 dB
IN
SNR Signal-to-Noise Ratio f = 1kHz l 71 73.4 dB
IN
THD Total Harmonic Distortion f = 1kHz, First5 Harmonics l ?88 ?77 dB
IN
l
SFDR Spurious FreeDynamic Range f = 1kHz 79 90 dB
IN
Channel-to-Channel Isolation f = 1kHz ?109 dB
IN
Full Linear Bandwidth (Note 11) 700 kHz
?3dB Input LinearBandwidth 25 MHz
ApertureDelay 13 ns
TransientResponse Full-ScaleStep 240 ns
2309fd
12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)LTC2309
ABs OL etu M Ax IMu M RAt In Gs (Notes 1, 2)
Supply Voltage
Power Dissipation .............................................. 500mW
V .......................................................... ?0.3V to 6V
Operating TemperatureR ange
DD
Analog InputV oltage( Note 3)
LTC2309C ................................................ 0?C to 70?C
CH0-CH7,CO M,V ,
LTC2309I .............................................?40?C to 85?C
REF
REFCOMP .................... (GND ?0 .3V) to (V + 0.3V)
LTC2309H .......................................... ?40?C to 125?C
DD
DigitalI nputV oltage
Storage TemperatureR ange .................. ?65?C to 150?C
(Note3 ) ............................ (GND ? 0.3V) to (V +0 .3V)
Lead Temperature (Soldering, 10s ec)
DD
Digital Output Voltage ...... (GND ?0 .3V) to (V +0 .3V)
TSSOP ..............................................................300?C
DD
Ip n C On FIGu RAt IOn
TOP VIEW
TOP VIEW
REFCOMP 1 20 V
REF
24 23 22 21 20 19
GND 2 19 COM
CH3 1 18 GND
V 3 18 CH7
DD
CH4 2 17 SDA
AD0 4 17 CH6
CH5 3 16 SCL
25
AD1 5 16 CH5
CH6 4 15 AD1
SCL 6 15 CH4
CH7 5 14 AD0
SDA 7 14 CH3
COM 6 13 V
DD
GND 8 13 CH2
7 8 9 10 11 12
GND 9 12 CH1
V 10 11 CH0
DD
F PACKAGE
UF PACKAGE
20-LEAD PLASTIC TSSOP
24-LEAD (4mm s 4mm) PLASTIC QFN
T = 150?C, ? =90?C/W , ? = 20?C/W
JMAX JA JC
T = 150?C, ? = 37?C/W
JMAX JA
EXPOSED PAD(PIN 25) IS GND, MUSTBE SOLDERED TOPCB
ORDe R In FORMAt IOn
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2309CUF#PBF LTC2309CUF#TRPBF 2309 0?C to 70?C
24-Lead(4mm ? 4mm)Plastic QFN
LTC2309IUF#PBF LTC2309IUF#TRPBF 2309 24-Lead (4mm ?4mm) Plastic QFN ?40?C to 85?C
LTC2309CF#PBF LTC2309CF#TRPBF LTC2309F 20-Lead Plastic TSSOP 0?C to 70?C
LTC2309IF#PBF LTC2309IF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 85?C
LTC2309HF#PBF LTC2309HF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 125?C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information onnon-standard lead based finish parts.
Formore information onlead free part marking, go to: http://www.linear.com/leadfree/
For moreinformation on tape and reelspecifications, go to: http://www.linear.com/tapeandreel/
2309fd
V CH2
REF
REFCOMP CH1
GND CH0
GND V
DD
GND GND
V GND
DD12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)12-BIT
SAR ADC
LTC2309
8-Channel, 12-Bit SAR ADC
2
with I C Interface
Fe Aut Rse Dse CRItp IOn
?
n
12-Bit Resolution The LTC 2309 is a low noise, low power, 8-channel, 12-bit
2
n
Low Power: 1.5mW at 1ksps, 35?W Sleep Mode successive approximation ADC with an I C compatible
n
14ksps Throughput Rate serial interface. This ADC includes an internal reference
n
Low Noise: SNR = 73.4dB and a fully differential sample-and-hold circuit to reduce
n
Guaranteed No Missing Codes common mode noise. The LTC2309 operates from an
n
Single5V Supply internal clock to achieve a fast1.3?s conversion time.
2
n
2-Wire I C CompatibleSerial Inter face withNine
The LTC2309 operates from a single 5V supply and
Addresses Plus OneGlobal for Synchronization
draws just 300?A at a throughput rate of 1ksps. The
n
FastConversion Time: 1.3?s
ADC enters nap mode when not converting, reducing
n
Internal Reference
the power dissipation.
n
Internal 8-Channel Multiplexer
n The LTC2309 is available in both a small 24-pin 4mm ?
Internal Conversion Clock
n 4mm QFN and a 20-pin TSSOP package. The internal 2.5V
Unipolar or Bipolar Input Ranges (Software Selectable)
n reference and 8-channel multiplexer further reduce PCB
Guaranteed Operation from ?40?C to 125?C
boardspace requirements.
(TSSOP Package)
n
24-Pin 4mm ? 4mm QFN and 20-Pin TSSOP Packages
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
App LICAt IOsn
2
tions, while the 2-wire I C compatible serial interface makes
n thisADC a goodmatch for space-constrainedsystems.
IndustrialProcess Control
n L,L T, LTC, LTM, Linear Technology andthe Linear logo are registered trademarksand
Motor Control
EasyDrive is a trademark of Linear Technology Corporation. All othertrademarks arethe
n
AccelerometerMeasurements propertyof their respective owners.
n
Battery-OperatedInstruments
n
Isolated and/or RemoteData Acquisition
n
Power Supply Monitoring
BLOCK DIAGRAM
5V
Integral Nonlinearity
vs Output Code
0.1?F 10?F
1.00
V 0.75
DD
CH0
AD1
LTC2309
AD0 0.50
CH1
CH2
0.25
ANALOG
CH3 SCL
+
2
ANALOG INPUTS I C
INPUT 0
CH4 PORT
0V TO 4.096V UNIPOLAR ?
MUX
SDA
?2.048V BIPOLAR
?0.25
CH5
CH6 ?0.50
V
REF
CH7
INTERNAL
2.2?F ?0.75
2.5V REF
COM
?1.00
0 1024 2048 3072 4096
OUTPUT CODE
REFCOMP
2309 G01
GND
0.1?F 10?F
2309 TA01
2309fd
INL (LSB)LTC2309
ABs OL etu M Ax IMu M RAt In Gs (Notes 1, 2)
Supply Voltage
Power Dissipation .............................................. 500mW
V .......................................................... ?0.3V to 6V
Operating TemperatureR ange
DD
Analog InputV oltage( Note 3)
LTC2309C ................................................ 0?C to 70?C
CH0-CH7,CO M,V ,
LTC2309I .............................................?40?C to 85?C
REF
REFCOMP .................... (GND ?0 .3V) to (V + 0.3V)
LTC2309H .......................................... ?40?C to 125?C
DD
DigitalI nputV oltage
Storage TemperatureR ange .................. ?65?C to 150?C
(Note3 ) ............................ (GND ? 0.3V) to (V +0 .3V)
Lead Temperature (Soldering, 10s ec)
DD
Digital Output Voltage ...... (GND ?0 .3V) to (V +0 .3V)
TSSOP ..............................................................300?C
DD
Ip n C On FIGu RAt IOn
TOP VIEW
TOP VIEW
REFCOMP 1 20 V
REF
24 23 22 21 20 19
GND 2 19 COM
CH3 1 18 GND
V 3 18 CH7
DD
CH4 2 17 SDA
AD0 4 17 CH6
CH5 3 16 SCL
25
AD1 5 16 CH5
CH6 4 15 AD1
SCL 6 15 CH4
CH7 5 14 AD0
SDA 7 14 CH3
COM 6 13 V
DD
GND 8 13 CH2
7 8 9 10 11 12
GND 9 12 CH1
V 10 11 CH0
DD
F PACKAGE
UF PACKAGE
20-LEAD PLASTIC TSSOP
24-LEAD (4mm s 4mm) PLASTIC QFN
T = 150?C, ? =90?C/W , ? = 20?C/W
JMAX JA JC
T = 150?C, ? = 37?C/W
JMAX JA
EXPOSED PAD(PIN 25) IS GND, MUSTBE SOLDERED TOPCB
ORDe R In FORMAt IOn
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2309CUF#PBF LTC2309CUF#TRPBF 2309 0?C to 70?C
24-Lead(4mm ? 4mm)Plastic QFN
LTC2309IUF#PBF LTC2309IUF#TRPBF 2309 24-Lead (4mm ?4mm) Plastic QFN ?40?C to 85?C
LTC2309CF#PBF LTC2309CF#TRPBF LTC2309F 20-Lead Plastic TSSOP 0?C to 70?C
LTC2309IF#PBF LTC2309IF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 85?C
LTC2309HF#PBF LTC2309HF#TRPBF LTC2309F 20-Lead Plastic TSSOP ?40?C to 125?C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information onnon-standard lead based finish parts.
Formore information onlead free part marking, go to: http://www.linear.com/leadfree/
For moreinformation on tape and reelspecifications, go to: http://www.linear.com/tapeandreel/
2309fd
V CH2
REF
REFCOMP CH1
GND CH0
GND V
DD
GND GND
V GND
DDLTC2309
C On Ve Ret R An D Mu Lt Ip Lexe R CHARACet RIts ICs The l denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at T = 25?C. (Notes 4, 5)
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No MissingCodes) l 12 Bits
l
Integral Linearity Error (Note 6) ?0.45 ?1 LSB
Differential Linearity Error l ?0.35 ?1 LSB
l
BipolarZero Error (Note7) ?1 ?8 LSB
BipolarZero Error Drift 0.002 LSB/?C
BipolarZero Error Match ?0.1 ?3 LSB
l
UnipolarZero Error (Note 7) ?0.4 ?6 LSB
UnipolarZero Error Drift 0.002 LSB/?C
UnipolarZero Error Match ?0.2 ?1 LSB
Bipolar Full-ScaleError External Reference (Note 8) l ?0.5 ?10 LSB
REFCOMP =4.096V l ?0.4 ?9 LSB
BipolarFull-Scale ErrorDrift ExternalReference 0.05 LSB/?C
BipolarFull-Scale Error Match ?0.4 ?3 LSB
l
Unipolar Full-Scale Error QFNExternal Reference (Note 8) ?0.4 ?10 LSB
l
TSSOPExternal Reference(Note 8) ?0.5 ?12 LSB
REFCOMP = 4.096V l ?0.3 ?6 LSB
UnipolarFull-Scale Error Drift External Reference 0.05 LSB/?C
Unipolar Full-Scale ErrorMatch ?0.3 ?2 LSB
A n ALOG Itupn The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T = 25?C. (Note 4)
A
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
+
l
V AbsoluteInput Range (CH0 to CH7) (Note9) ?0.05 REFCOMP V
IN
?
V Absolute Input Range (CH0 to CH7, COM) Unipolar(Note 9) l ?0.05 0.25 ? REFCOMP V
IN
Bipolar (Note 9) l ?0.05 0.75 ? REFCOMP V
+ ? + ?
l
V ? V InputDifferential VoltageRange V = V ? V (Unipolar) 0to REFCOMP V
IN IN IN IN IN
+ ?
l
V = V ? V (Bipolar) ?REFCOMP/2 V
IN IN IN
I AnalogInput Leakage Current l ?1 ?A
IN
C AnalogInput Capacitance SampleMode 55 pF
IN
Hold Mode 5 pF
CMRR InputCommon Mode Rejection Ratio 70 dB
D Yn AMIC ACCu RACY The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T = 25?C. A = ?1dBFS. (Notes 4, 10)
A IN
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
l
SINAD Signal-to-(Noise + Distortion) Ratio f = 1kHz 71 73.3 dB
IN
SNR Signal-to-Noise Ratio f = 1kHz l 71 73.4 dB
IN
THD Total Harmonic Distortion f = 1kHz, First5 Harmonics l ?88 ?77 dB
IN
l
SFDR Spurious FreeDynamic Range f = 1kHz 79 90 dB
IN
Channel-to-Channel Isolation f = 1kHz ?109 dB
IN
Full Linear Bandwidth (Note 11) 700 kHz
?3dB Input LinearBandwidth 25 MHz
ApertureDelay 13 ns
TransientResponse Full-ScaleStep 240 ns
2309fd