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AD7142 - Programmable Controller

General Description

The AD7142 and AD7142-1 are integrated capacitance-todigital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel user input method.

Key Features

  • Programmable capacitance-to-digital converter 36 ms update rate (@ maximum sequence length) Better than 1 fF resolution 14 capacitance sensor input channels No external RC tuning components required Automatic conversion sequencer On-chip automatic calibration logic Automatic compensation for environmental changes Automatic adaptive threshold and sensitivity levels On-chip RAM to store calibration data SPI®-compatible serial interface (AD7142) I2C®-compatible serial interface (AD7142-1) Separate.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FEATURES Programmable capacitance-to-digital converter 36 ms update rate (@ maximum sequence length) Better than 1 fF resolution 14 capacitance sensor input channels No external RC tuning components required Automatic conversion sequencer On-chip automatic calibration logic Automatic compensation for environmental changes Automatic adaptive threshold and sensitivity levels On-chip RAM to store calibration data SPI®-compatible serial interface (AD7142) I2C®-compatible serial interface (AD7142-1) Separate VDRIVE level for serial interface Interrupt output and GPIO 32-lead, 5 mm x 5 mm LFCSP_VQ 2.6 V to 3.