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AD7143 - integrated capacitance-to-digital converter

Description

The AD7143 is an integrated capacitance-to-digital converter (CDC) with on-chip environmental calibration for use in systems requiring a novel user input method.

The AD7143 interfaces to external capacitance sensors implementing functions, such as capacitive buttons, scroll bars, and scroll wheels.

Features

  • Programmable capacitance-to-digital converter 25 ms update rate (@ maximum sequence length) Better than 1 fF resolution 8 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 I2C®-compatible serial interface Separate VDRIVE level for serial interface Interrupt output for.

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Datasheet Details

Part number AD7143
Manufacturer Analog Devices
File Size 1.76 MB
Description integrated capacitance-to-digital converter
Datasheet download datasheet AD7143 Datasheet

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Full PDF Text Transcription

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www.DataSheet4U.com Programmable Controller for Capacitance Touch Sensors AD7143 FEATURES Programmable capacitance-to-digital converter 25 ms update rate (@ maximum sequence length) Better than 1 fF resolution 8 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 I2C®-compatible serial interface Separate VDRIVE level for serial interface Interrupt output for host controller 16-lead, 4 mm x 4 mm LFCSP-VQ 2.6 V to 3.
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