AD7147A-1ACBZ500R7

Overview

The AD7147A-1ACBZ500R7 is a CapTouch programmable controller for single-electrode capacitance sensors, manufactured by Analog Devices Inc. It integrates a capacitance-to-digital converter (CDC) with a 16-bit sigma-delta architecture and 250 kHz sampling rate. The device features 13 sensor inputs, an I²C-compatible serial interface, and on-chip environmental calibration logic. Operating from a 2.6 V to 3.6 V supply, it supports full power mode (1 mA) and low power mode (28.96 μA typical). The component is housed in a 25-ball WLCSP package measuring 2.3 mm × 2.1 mm.

Feature Summary

• Integrated 16-bit CDC with 13 sensor inputs and automatic conversion sequencer
• I²C-compatible serial interface with separate VDRIVE level for logic compatibility
• On-chip automatic calibration and adaptive threshold logic for environmental compensation
• Low operating current: 1 mA in full power mode, 28.96 μA in low power mode

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm interface type and packaging details. Ensure that the selected variant matches the required serial communication protocol for the target system design.

Selection Notes

Select this component for applications requiring high-resolution capacitance sensing with minimal external components. Consider the I²C interface requirement for the AD7147A-1 variant versus the SPI interface of the standard AD7147A. Evaluate power consumption requirements to determine if low power mode with automatic wake-up is necessary for battery-operated devices.

Part Context

This part belongs to the AD7147 family of CapTouch controllers designed for user input methods like buttons, scroll bars, and wheels. It utilizes a switch matrix to route sensor inputs to the internal ADC. The register map is compatible with other members of the AD714x series, facilitating integration into existing designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.