ADAU7112ACBZRL

Overview

The ADAU7112ACBZRL 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 performs a fixed 64× decimation ratio to produce a 24-bit PCM output stream. The device supports output sampling rates from 4 kHz to 96 kHz with bit clock rates ranging from 64× to 512× the sample rate. It features an A-weighted signal-to-noise ratio of 126 dB and operates on dual power supplies: DVDD (1.10 V to 1.98 V) and IOVDD (1.70 V to 3.63 V). The component is housed in a 9-ball, 1.26 mm × 1.26 mm WLCSP package.

Feature Summary

• Stereo PDM to PCM conversion with 64× decimation ratio
• 24-bit resolution supporting high sound pressure level microphones
• 126 dB A-weighted SNR and dynamic range
• Slave I2S or TDM output interface with configurable slot routing

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm tape and reel dimensions. The ACBZRL variant indicates a 13-inch tape and reel packaging option, whereas other suffixes may denote different reel sizes. Ensure compatibility with the required PCB footprint for the 9-ball WLCSP package during procurement planning.

Selection Notes

Select this component when a compact solution for converting digital microphone signals to PCM is required. The device supports up to TDM-16 formats but places data only in the first eight slots. Verify that the system design accommodates the separate DVDD and IOVDD supply rails and the automatic power-down behavior triggered by the removal of BCLK or FSYNC signals.

Part Context

The ADAU7112ACBZRL belongs to the ADAU7112 family of audio converters. It is functionally similar to the ADAU7118, which handles eight channels, but offers a smaller physical footprint suitable for space-constrained stereo applications. The part is specified over a commercial temperature range of −40°C to +85°C.

Replacement Considerations

The ADAU7112ACBZR7 is a direct functional substitute with identical electrical specifications, differing only in the tape and reel size (7-inch vs. 13-inch). No other cross-model replacements are confirmed in the provided documentation.