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AD7148 - Programmable Touch Controller

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.

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.

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Datasheet Details

Part number AD7148
Manufacturer Analog Devices
File Size 614.28 KB
Description Programmable Touch Controller
Datasheet download datasheet AD7148 Datasheet
Additional preview pages of the AD7148 datasheet.

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Full PDF Text Transcription

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Programmable Touch Controller for Single Electrode Capacitance Sensors AD7148 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 serial interface Interrupt output 16-lead, 4 mm × 4 mm LFCSP 2.6 V to 3.3 V supply voltage Low operating current Full power mode: 1 mA Low power mode: 21.
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