Description

Programmable Controller for Capacitance Touch Sensors Features:Programmable capacitance-to-digital converter36 ms update rate (@ maximum sequence length)Better than 1 fF resolution14 capacitance sensor input channelsNo external RC tuning components requiredAutomatic conversion sequencerOn-chip automatic calibration logicAutomatic compensation for environmental changesAutomatic adaptive threshold and sensitivity levelsOn-chip RAM to store calibration dataSPI-compatible serial interface (AD7142)I2C-compatible serial interface (AD7142-1) Separate VDRIVE level for serial interfaceInterrupt output and GPIO32-lead, 5 mm x 5 mm LFCSP_VQ2.6 V to 3.6 V supply voltageLow operating currentFull power mode: less than 1 mALow power mode: 50 A