ADAU1442/ADAU1445/ADAU1446 is a fully programmable audio digital signal processor (DSP) from Analog Devices featuring a flexible audio routing matrix (FARM). It has a 172 MHz SigmaDSP core, 3584 instructions per sample (48 kHz), 4k parameter RAM and 8k data RAM. It also supports 24 channels of digital input and output, up to 8 stereo asynchronous sample rate converters (from 1:8 to 7.75:1 ratio and 139 dB DNR), stereo S/PDIF input and output, supports serial and TDM I/O and more.
The ADAU1442, ADAU1445, and ADAU1446 are SigmaDSP digital audio processors with a flexible audio routing matrix (FARM) that supports up to eight stereo asynchronous sample‑rate converters, 24‑channel digital I/O, and S/PDIF interfaces. They are designed for automotive and commercial audio applications such as head units, navigation systems, and DSP amplifiers.
The datasheet includes detailed specifications, timing diagrams, pin configurations, and ordering information for the 100‑lead TQFP and LQFP packages. It also describes power supply requirements, temperature range, and the SigmaStudio software environment used for development.
| SigmaDSP core frequency | 172 MHz |
|---|---|
| Digital I/O channels | 24‑channel digital input and output |
| Asynchronous sample‑rate converters | Up to 8 stereo converters, 1:8 to 7.75:1 ratio, 139 dB DNR |
| Power supply voltages | AVDD 3.3 V, DVDD 18 V, PVDD 33 V, IOVDD 3.3 V |
| Operating temperature range | ‑40 °C to +105 °C |
The core clock runs at 172.032 MHz.
The device provides 24‑channel digital input and output.
The ASRCs achieve a dynamic range of 139 dB A‑weighted.
They are offered in 100‑lead TQFP and LQFP packages.