AD7147ACPZ-1500RL7

Overview

The AD7147ACPZ-1500RL7 is a programmable capacitance-to-digital converter (CDC) controller designed for single-electrode capacitive sensors. It features 13 sensor inputs, femtofarad resolution, and an on-chip 16-bit sigma-delta converter. The device operates from a 2.6 V to 3.6 V supply with full power consumption of 1 mA and low power mode current as low as 21.5 μA. It includes automatic environmental calibration, adaptive thresholds, and an SPI-compatible serial interface. Packaged in a 24-lead, 4 mm × 4 mm LFCSP, it supports automotive applications and provides interrupt outputs and GPIO functionality.

Feature Summary

• 13 capacitance sensor inputs with femtofarad resolution
• On-chip automatic calibration and adaptive threshold logic
• SPI-compatible serial interface with separate VDRIVE level
• Low operating current: 1 mA (full power), 21.5 μA (low power)

Applications

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

Procurement Notes

Verify the specific ordering suffix RL7 indicates reel packaging configuration. Confirm the ACPZ package designation matches the required 24-lead, 4 mm × 4 mm LFCSP form factor. Ensure the -1500 variant aligns with automotive qualification requirements if applicable to the target system design.

Selection Notes

Select this component when single-electrode capacitive sensing with high resolution is required. The AD7147 is suitable for applications needing automatic environmental compensation without external RC components. Consider the SPI interface compatibility with the host processor and verify that the 2.6 V to 3.6 V supply range meets system power constraints.

Part Context

This part belongs to the Analog Devices AD7147 family of CapTouch controllers. It shares register map compatibility with the AD7142. The AD7147 variant specifically offers an SPI interface, whereas the AD7147-1 offers I2C compatibility. Both variants share identical pinouts and core CDC functionality within the same LFCSP package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for current alternative product recommendations based on specific interface or performance requirements.