IQS232-00000SOR

IQ Switch ProxSense Series IQS232Datasheet-Congurable2Channelsensorwith CompensationforSensitivityReducingObjects UnparallelledFeatures: Sub4A current consumption Automatic tuning for optimal operation in various environments & compensation against sensi- tivity reducing objects TheIQS232ProxSense ICisafullyintegratedtwochannelcapacitivecontactandproximitysensor with market leading sensitivity and automatic tuning of the sense electrodes. The IQS232 provides a minimalist implementation requiring as few as 2 external components. The device is ready for use in a large range of applications while programming options allow customisation in specialised applications. Mainfeatures: 2 Channel input device Differentiated Touch and Distributed Proximity Electrode ATI: Automatic tuning to optimum sensitivity Supply Voltage1.8V to3.6V Internal voltage regulator and reference capacitor OTP options available Direct (logic level) and serial data output Low Power Modes (sub4A min) Adjustable Proximity & Touch Thresholds Automatic drift compensation Development and Programming tools available Small and cost effective SO-8 package Applications: White goods and appliances Remote Controls Ofce equipment, toys, sanitary ware Proximity detection that enables back light- ing activation (Patented) Wake-up from standby applications Replacement for electro mechanical switches GUI trigger on proximity detection. Copyright Azoteq (Pty) Ltd 2017 IQS232 Datasheet Page 1of 32 All rights reserved Revision 1.04 September 2017 IQ Switch ProxSense Series Contents ListofFigures 3 ListofTables 3 RevisionHistory 3 ListofSymbols 4 1 FunctionalOverview 5 1.1 Pin Outs ................ 5 1.2 Applicability ................ 6 2 AnalogueFunctionality 6 3 DigitalFunctionality 6 4 ReferenceDesign 7 4.1 Power Supply and PCB Layout ............ 7 4.2 Design Rules for Harsh EMC Environments ......... 8 5 HighSensitivity 9 6 UserCongurableOptions 9 6.1 Conguring of Devices .............. 9 7 DescriptionofUserOptions 15 7.1 ATI Method ................ 15 7.2 Touch Base Values .............. 15 7.3 Touch Thresholds ............... 15 7.4 Proximity Threshold .............. 15 7.5 Halt time ................ 16 7.6 Proximity Base Value ............. 16 7.7 Sensitivity Multipliers ............. 16 7.8 Base Multipliers .............. 16 7.9 Base Select ................ 16 7.10 Charge Transfer Frequency ............ 17 7.11 Streaming mode .............. 17 7.12 Noise Detect ................ 17 7.13 Low Power Mode ............... 18 7.14 Guard Channel .............. 19 7.15 Output Logic Select .............. 19 7.16 ATI Delay ................. 19 7.17 ATI Target ................. 19 8 ChargeTransfers 20 9 AutoTuningImplementation 21 9.1 Full ATI ................. 21 9.2 Partial ATI ................. 22 10 Specications 23 Copyright Azoteq (Pty) Ltd 2017 IQS232 Datasheet Page 2of 32 All rights reserved Revision 1.04 September 2017