AD7147 Datasheet PDF | Analog Devices

Analog Devices AD7147

The AD7147 is designed for single-electrode capacitance sensors (grounded sensors). The AD7147 has on-chip calibration logic to compensate for changes in the ambient environment. The calibration sequence is performed automatically and at continuous intervals as long as the sensors are not touched.

Part No.	AD7147
Datasheet	AD7147 Download
Manufacturer	Analog Devices
Description	CapTouch Programmable Controller
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FEATURES

Programmable capacitance-to-digital converter (CDC) Femtofarad resolution 13 capacitance sensor inputs 9 ms update rate, all 13 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 is compatible with the AD7142 On-chip RAM to store calibration data SPI-compatible (serial-peripheral-interface-compatible) serial interface (AD7147) I2C-compatible serial interface (AD7147-1) Separate VDRIVE level for serial interface Interrupt output and general-purpose input/output (GPIO) 24-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: 21.5 μA FUNCTIONAL BLOCK DIAGRAM ACSHIELD VCC 8 11 GND 10 BIAS 9 CIN0 19 CIN1 20 CIN2 21 CIN3 22 CIN4 23 EXCITATION SOURCE POWER-ON RESET LOGIC CIN6 1 CIN7 2 CIN8 3 CIN9 4 CIN10 5 CIN11 6 CIN12 7 SWITCH MATRIX CIN5 24 AD714...