AD7147PACPZ-1RL

Overview

The AD7147PACPZ-1RL is a CapTouch programmable controller for single-electrode capacitance sensors, manufactured by Analog Devices Inc. It integrates a 16-bit, 250 kHz sigma-delta capacitance-to-digital converter (CDC) with on-chip environmental calibration logic. The device features 13 sensor inputs and supports SPI-compatible serial communication. Operating from a 2.6 V to 3.6 V supply, it consumes 1 mA in full power mode and approximately 21.5 μA in low power mode. The component is housed in a 24-lead, 4 mm × 4 mm LFCSP package.

Feature Summary

• Integrated 16-bit CDC with 250 kHz sampling rate and femtofarad resolution
• On-chip automatic calibration and adaptive threshold logic for environmental compensation
• 13 dedicated capacitance sensor input pins (CIN0–CIN12)
• SPI-compatible serial interface with separate VDRIVE level for logic compatibility

Applications

• Cell phones and smart handheld devices
• Personal music and multimedia players
• Television, A/V, and remote controls
• Gaming consoles and digital still cameras

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm pinout and interface configuration. Ensure the procurement source provides valid manufacturer traceability. Confirm that the component meets the required automotive qualification standards if applicable to the design.

Selection Notes

Select this component for applications requiring high-resolution capacitive sensing without external RC components. The AD7147 is suitable for systems needing an SPI interface; for I2C requirements, consider the AD7147-1 variant. Evaluate power consumption based on the required decimation rate and low power mode delay settings.

Part Context

This part belongs to the AD7147 family of CapTouch controllers designed for portable electronics. It replaces older discrete solutions by integrating the CDC, calibration engine, and control logic into a single chip. The register map is compatible with the AD7142, facilitating migration for existing designs.

Replacement Considerations

The AD7147-1 serves as a functional alternative with an I2C-compatible interface instead of SPI. Both parts share identical pinouts and core functionality but differ in serial communication protocol.