ADAU1442YSVZ-3A

Overview

The ADAU1442YSVZ-3A is a fully programmable SigmaDSP digital audio processor featuring a flexible audio routing matrix (FARM). It operates with a 172 MHz core clock and supports up to 16 channels of asynchronous sample rate converters (ASRCs) with a dynamic range of 139 dB. The device provides 24-channel digital I/O, stereo S/PDIF interfaces, and multichannel TDM serial ports supporting sample rates up to 192 kHz. It includes an on-chip regulator generating 1.8 V from a 3.3 V supply, controlled via SPI or I2C interfaces, and housed in a 100-lead TQFP package.

Feature Summary

• SigmaDSP core operating at 172 MHz with 4k parameter RAM and 8k data RAM
• Flexible Audio Routing Matrix (FARM) with up to 16 stereo ASRC channels
• 24-channel digital input/output with support for serial, TDM, and S/PDIF interfaces
• On-chip voltage regulator generating 1.8 V DVDD from 3.3 V AVDD

Applications

• Automotive audio processing head units
• Rear-seat entertainment systems
• DSP amplifiers for sound systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with the required control interface (SPI or I2C) and power supply voltages (AVDD 3.3 V, DVDD 1.8 V). Confirm that the design accounts for the thermal resistance characteristics of the 100-lead TQFP package under maximum load conditions.

Selection Notes

Select this component when a high channel count with extensive asynchronous sample rate conversion is required. The ADAU1442 variant supports nine independent clock domains, distinguishing it from the ADAU1445 which supports fewer domains. Verify that the system architecture can accommodate the 100-pin TQFP footprint and the associated decoupling requirements for multiple supply rails.

Part Context

The ADAU1442 is part of the ADAU144x family alongside the ADAU1445 and ADAU1446. While all share the same DSP core and FARM architecture, they differ in ASRC channel count and clock domain support. The ADAU1442 offers the highest flexibility with 16 ASRC channels and nine clock domains, whereas the ADAU1446 lacks ASRCs entirely.

Replacement Considerations

The ADAU1445YSVZ-3A serves as a functional substitute within the same package if reduced clock domain support (three vs. nine) is acceptable. The ADAU1446YSTZ-3A is not a direct replacement due to the absence of ASRC functionality and different packaging.