ADAU7112ACBZR7

Overview

The ADAU7112ACBZR7 is a stereo pulse density modulation (PDM) to pulse code modulation (PCM) converter manufactured by Analog Devices Inc. It accepts two channels of PDM audio inputs and provides a 24-bit PCM output stream via an I2S or TDM serial interface. The device features a fixed 64× decimation ratio, supporting output sampling rates from 4 kHz to 96 kHz with bit clock rates up to 512× the sample rate. It operates on dual supplies: DVDD (1.10 V to 1.98 V) and IOVDD (1.70 V to 3.63 V). Key performance metrics include a 126 dB A-weighted signal-to-noise ratio and low power consumption, such as 0.36 mA at 48 kHz. The component is housed in a 9-ball WLCSP package.

Feature Summary

• Stereo PDM to PCM conversion with 24-bit resolution and 126 dB SNR
• Supports I2S and TDM output formats with configurable slots
• Automatic PDM clock generation based on BCLK/FSYNC ratios
• Low power operation with automatic power-down when clocks are removed

Applications

• Mobile computing devices
• Portable electronics
• Consumer electronics
• Professional electronics

Procurement Notes

Verify the specific reel size for the 'R7' suffix, which indicates a 7-inch tape and reel packaging option compared to the standard 13-inch reel. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure supply voltage requirements match the design constraints for both DVDD and IOVDD rails.

Selection Notes

Select this component for applications requiring stereo digital microphone integration with minimal external components. The fixed 64× decimation ratio limits flexibility but simplifies system design. Ensure the host processor supports the required I2S or TDM timing configurations. Verify that the available TDM slot configuration aligns with the system's data bus architecture.

Part Context

This part belongs to the ADAU7112 series of audio analog-to-digital converters. It is functionally similar to other members like the ADAU7118 but offers fewer channels. The CBZR7 suffix denotes the specific wafer level chip scale package variant with a 7-inch tape and reel shipping format.

Replacement Considerations

The EVAL-ADAU12Z is an evaluation board for development purposes, not a direct functional replacement. No alternative part numbers are explicitly confirmed as direct substitutes in the provided documentation.