ADAU1979WBCPZ-RL

Overview

The ADAU1979WBCPZ-RL is a quad analog-to-digital converter (ADC) from Analog Devices Inc., designed for high-performance audio applications. It features four differential inputs with a typical full-scale AC voltage of 4.5 V rms and utilizes a multibit sigma-delta architecture. The device offers a dynamic range of 109 dB and total harmonic distortion plus noise of −95 dB. It supports sample rates from 8 kHz to 192 kHz with 24-bit resolution. Powered by a single 3.3 V supply, it includes an on-chip PLL, digital volume control, and I2C/SPI interfaces. Qualified for automotive use, it is housed in a 40-lead LFCSP package.

Feature Summary

• Quad ADC with 4.5 V rms differential inputs and 109 dB dynamic range
• On-chip PLL for master clock generation from MCLK or LRCLK
• Digital volume control with autoramp and software-controllable clickless mute
• I2C/SPI control interface supporting right/left justified, I2S, and TDM modes

Applications

• Automotive audio systems
• Active noise cancellation systems

Procurement Notes

Verify the ordering suffix -RL indicates reel packaging when sourcing. Confirm the component meets automotive qualification standards required for the target application. Ensure the supply voltage matches the specified 3.3 V requirement for AVDDx and IOVDD pins during procurement validation.

Selection Notes

Select this component for designs requiring four independent high-resolution audio channels. The internal DVDD regulator simplifies power design by generating 1.8 V from the 3.3 V input. Consider the 40-lead LFCSP package constraints and thermal resistance values when designing the PCB layout for adequate heat dissipation.

Part Context

This part belongs to the ADAU1979 series of quad ADCs. The -RL suffix denotes tape and reel packaging for automated assembly. It is distinct from variants without the suffix which may come in tray packaging. The device is specifically optimized for low electromagnetic interference in automotive environments.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family if availability is constrained. Verify that any replacement maintains the 24-bit resolution and 192 kHz maximum sample rate specifications required for the application.