This document introduces the features and characteristics of the SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs ADAU1701 Rev. B product
The ADAU1701 is a single‑chip audio system that combines a 28‑/56‑bit SigmaDSP audio processor with two ADCs, four DACs, and programmable control interfaces. It supports full‑precision 56‑bit processing, a flexible master‑clock generator, and multiple serial data formats for a wide range of multimedia and automotive applications.
This handbook details the device’s features, electrical specifications, pin assignments, timing diagrams, power and regulator information, PLL operation, and ordering options. It also includes functional block diagrams, typical application schematics, and guidance for using the SigmaStudio software to configure custom signal‑processing flows.
| ADC resolution | 24 bits |
|---|---|
| DAC resolution | 24 bits |
| ADC signal‑to‑noise ratio (A‑weighted) | 100 dB |
| DAC signal‑to‑noise ratio (A‑weighted) | 104 dB |
| Analog supply voltage (AVDD) | 3.3 V |
| PLL lock time | 20 ms |
| Operating temperature range | 0 °C to 70 °C (ambient) |
| Package | 48‑lead LQFP (ST‑48) |
Sampling rates of up to 192 kHz are supported.
Both ADCs have a resolution of 24 bits.
The analog core operates from a 3.3 V supply (AVDD).