ADAU1772BCPZ

Overview

The ADAU1772BCPZ is a low-power audio codec featuring four analog-to-digital converters and two digital-to-analog converters. It integrates a programmable audio processing engine supporting sample rates from 8 kHz to 192 kHz with a 38 μs analog-to-analog latency. The device provides 24-bit resolution, achieving 102 dB SNR for ADCs and 107 dB combined SNR for DACs. It operates on supply voltages ranging from 1.8 V to 3.3 V for analog and I/O sections, and 1.1 V to 1.8 V for the DSP core. Control interfaces include I2C and SPI, with support for self-booting from an external EEPROM.

Feature Summary

• Integrates a programmable audio processing engine capable of executing biquad filters, limiters, volume controls, and mixing operations.
• Features full-duplex asynchronous sample rate converters (ASRCs) to handle varying input and output clock domains.
• Supports multiple input configurations including single-ended line inputs, microphone inputs via PGA, and dual stereo digital microphone inputs.
• Provides flexible analog output options configurable as either single-ended line outputs or differential headphone drivers.

Applications

• Noise cancelling handsets, headsets, and headphones
• Bluetooth ANC handsets, headsets, and headphones
• Personal navigation devices
• Digital still and video cameras

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and temperature grade. Confirm that the required boot configuration matches the available EEPROM interface options. Check for any recent revision changes in the datasheet that may affect pin compatibility or electrical specifications before finalizing procurement.

Selection Notes

Select this component when a complete headset solution with integrated DSP is required. Ensure the design accommodates the necessary passive components for the crystal oscillator and power supply bypassing. Verify that the system clock requirements align with the supported PLL input range of 8 MHz to 27 MHz. Consider the power consumption profiles if battery life is a critical constraint for the application.

Part Context

The ADAU1772 belongs to Analog Devices' SigmaDSP family of audio processors. It combines high-fidelity conversion with real-time signal processing in a compact package. This integration reduces the need for external microcontrollers for basic audio tasks, simplifying the overall system architecture for portable audio devices.

Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation. Evaluate other SigmaDSP series codecs based on channel count and processing capabilities if replacement is necessary.

FAQ

What is the analog-to-analog latency of the ADAU1772?

The device features a low latency path of 38 microseconds from analog input to analog output.

Can the ADAU1772 operate without an external microcontroller?

Yes, it supports self-booting from an I2C EEPROM, allowing it to initialize and run audio processing algorithms independently.

What types of digital microphone inputs are supported?

The ADAU1772 includes dual stereo digital microphone inputs, supporting PDM signals.