AD7147WPACPZ-500R7

Overview

The AD7147WPACPZ-500R7 is an automotive-grade CapTouch programmable controller for single-electrode capacitance sensors. It integrates a 16-bit, 250 kHz sigma-delta capacitance-to-digital converter (CDC) with 13 sensor inputs and on-chip environmental calibration logic. The device operates from a 2.6 V to 3.6 V supply, consuming 1 mA in full power mode and 21.5 μA in low power mode. It features an SPI-compatible serial interface with a separate VDRIVE level, interrupt output, and GPIO. Packaged in a 24-lead, 4 mm × 4 mm LFCSP, it supports update rates of approximately 9 ms for all inputs.

Feature Summary

• Automotive qualified (AEC-Q100) 16-bit CDC with 13 sensor inputs
• On-chip automatic calibration and adaptive threshold logic
• SPI-compatible serial interface with independent VDRIVE voltage
• Low power consumption: 21.5 μA typical in low power mode

Applications

• Cell phones
• Personal music and multimedia players
• Smart handheld devices
• Television, A/V, and remote controls
• Gaming consoles

Procurement Notes

Verify the specific suffix -500R7 indicates a reel quantity of 500 units against official Analog Devices documentation. Confirm that the W prefix denotes automotive qualification status as specified in the ordering guide. Ensure the package type matches the 24-lead LFCSP outline dimensions provided in the datasheet.

Selection Notes

Select this component for applications requiring AEC-Q100 certification and single-electrode capacitive sensing. The AD7147 variant provides SPI connectivity, whereas the AD7147-1 offers I2C compatibility. Ensure the host processor supports the required SPI timing specifications and that the VDRIVE pin can accommodate the necessary logic voltage levels for the serial interface.

Part Context

This part belongs to the AD7147 family of capacitance-to-digital converters designed for user input interfaces. It shares register map compatibility with the AD7142 but includes additional features such as adaptive thresholds and environmental calibration. The automotive grade version ensures reliability in demanding operating conditions compared to standard commercial variants.

Replacement Considerations

The AD7147-1 serves as a functional substitute if I2C communication is required instead of SPI. For non-automotive applications, the standard AD7147ACPZ may be considered, though qualification differences apply. Verify pinout compatibility when substituting with other members of the AD714x family.