SigmaDSP® 28-/56-Bit Audio Processor with Two ADCs and Four DACs ADAU1701 is a digital audio processor that operates independently and can be fully programmed using SigmaStudio™ graphical tool. It features two ADCs and four DACs with high signal-to-noise ratio and low total harmonic distortion, as well as flexible serial data input/output ports supporting various sampling rates.
The ADAU1701 is a single‑chip audio system that combines a 28‑/56‑bit SigmaDSP audio processor with two ADCs, four DACs and a microcontroller‑like control interface. It supports full‑precision 56‑bit processing, programmable signal‑processing blocks, and flexible serial audio interfaces.
The document provides a complete feature list, application examples, functional block diagrams, detailed specifications for analog performance, digital I/O, power supplies, PLL, timing, absolute maximum ratings, and register maps, along with typical application schematics and layout recommendations.
| ADC resolution | 24 Bits |
|---|---|
| ADC Signal‑to‑Noise Ratio | 100 dB (A‑weighted) |
| DAC resolution | 24 Bits |
| DAC Signal‑to‑Noise Ratio | 104 dB (A‑weighted) |
| Analog supply voltage (AVDD) | 3.3 V |
| Digital supply voltage (DVDD) | 1.8 V |
| PLL lock time | 20 ms |
| Operating temperature range | ‑40 °C to +130 °C (case) |
The device supports sampling rates up to 192 kHz.
The analog supply voltage is 3.3 V and the digital supply voltage is 1.8 V.
The PLL lock time is specified as 20 ms.