ADAU7118ACPZRL7

Overview

The ADAU7118ACPZRL7 is an 8-channel Pulse Density Modulation (PDM) to Inter-IC Serial (I2S) or Time Domain Multiplexed (TDM) converter manufactured by Analog Devices Inc. It converts four stereo PDM bitstreams into a single PCM output stream with 24-bit resolution and a 126 dB A-weighted signal-to-noise ratio. The device supports decimation ratios of 16×, 32×, or 64× and operates at output sampling rates from 4 kHz to 192 kHz. It features dual output PDM clocks, automatic clock generation, and configurable TDM slot routing. Power supplies include DVDD (1.10 V to 1.98 V) and IOVDD (1.70 V to 3.63 V), housed in a 16-lead LFCSP package.

Feature Summary

• Converts eight digital microphone inputs to 24-bit PCM audio via I2S or TDM interfaces
• Supports decimation ratios of 16×, 32×, or 64× with output sampling rates up to 192 kHz
• Features 126 dB A-weighted SNR and low power consumption (1.2 mA at 48 kHz)
• Includes automatic PDM clock generation and hardware mode operation without I2C

Applications

• Microphone arrays
• Mobile computing devices
• Portable electronics
• Consumer electronics
• Professional audio equipment

Procurement Notes

Verify the specific ordering suffix RL7 indicates reel packaging when sourcing this component. Confirm that the 16-LFCSP package dimensions match the target PCB footprint. Ensure voltage levels for DVDD and IOVDD align with system requirements before integration.

Selection Notes

Select this converter for applications requiring high channel counts from digital microphones. It is suitable for designs needing flexible TDM slot configuration or standalone hardware mode operation. Verify that the required decimation ratio matches the PDM microphone specifications to ensure optimal audio performance.

Part Context

This component belongs to the Analog Devices ADAU7118 series of audio interface converters. It is designed to bridge digital microphones and main processors using standard serial audio protocols. The device simplifies board layout by integrating decimation filtering and clock generation capabilities.

Replacement Considerations

Check for availability of EVAL-ADAU7118Z evaluation boards for design verification. Consider the ADAU7112 for applications requiring only two channels instead of eight.