AD7147ACPZ-REEL

Overview

The AD7147ACPZ-REEL is a 13-channel capacitive-sensor controller (capacitance-to-digital converter) from Analog Devices for building larger or custom touch and proximity sensor arrays. It provides 16-bit resolution, SPI data interface, and operates from a single 2.6 V to 3.6 V supply with an industrial temperature range. The device is supplied in a 24-lead WFQFN package with an exposed pad for PCB mounting and thermal/ground connection.

Why Choose This Part

The AD7147 reduces MCU overhead by handling up to 13 capacitive channels and presenting digitized results over SPI for easy host integration. Its 16-bit resolution and high per-channel sampling capability enable sensitive, fine-grain touch and proximity detection across large or custom electrode layouts. The single-supply operation (2.6 V to 3.6 V) and industrial temperature range simplify system power and environment requirements, while the exposed-pad WFQFN package supports good grounding and thermal performance.

Applications

Getting Started

Begin with the AD7147 datasheet and Analog Devices application notes on PCB layout for capacitive sensors (sensor trace routing, guard rings, grounding and decoupling). Prototype with an evaluation board or breakout if available, otherwise connect the AD7147 to an MCU with SPI (ensure correct SPI mode and clock rate). Keep a stable 2.6 V to 3.6 V supply with local decoupling, follow ADI recommendations for sensor layout, and validate sensitivity and thresholds with your actual sensor geometry and enclosure.

AD7147 Family

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