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AD7148 Datasheet Programmable Touch Controller

Manufacturer: Analog Devices

General Description

The AD7148 is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels.

The sensors need only one PCB layer, enabling ultrathin applications.

The AD7148 is an integrated capacitance-to-digital converter (CDC) with on-chip environmental calibration.

Overview

Programmable Touch Controller for Single Electrode Capacitance Sensors.

Key Features

  • www. datasheet4u. com Programmable capacitance-to-digital converter (CDC) Femtofarad (fF) resolution 8 capacitance sensor inputs 25 ms update rate, all 8 sensor inputs No external RC components required Automatic conversion sequencer On-chip automatic calibration logic Automatic compensation for environmental changes Automatic adaptive threshold and sensitivity levels Register map compatible with AD7143 On-chip RAM to store calibration data I2C-compatible serial interface Separate VDRIVE level for.