SigmaDSP® 28-/56-Bit Audio Processor with Two ADCs and Four DACs. Features include complete standalone operation, self-boot from serial EEPROM, auxiliary ADC with 4-input mux for analog control, GPIOs for digital controls and outputs, fully programmable with SigmaStudio™ graphical tool, etc.
The ADAU1701 is a single‑chip audio system that combines a 28‑/56‑bit SigmaDSP® audio processor, two high‑performance ADCs, four DACs, and a microcontroller‑like control interface. It supports full‑precision 56‑bit processing, flexible serial data ports, and can be programmed with the SigmaStudio™ graphical tool.
The handbook details functional block diagrams, electrical specifications, timing requirements, and register maps, enabling designers to integrate the device into multimedia speakers, automotive head units, digital TVs, and other audio applications.
| ADC Signal‑to‑Noise Ratio (A‑Weighted) | 100 dB |
|---|---|
| DAC Signal‑to‑Noise Ratio (A‑Weighted) | 104 dB |
| ADC Total Harmonic Distortion + Noise | -83 dB |
| DAC Total Harmonic Distortion + Noise | -90 dB |
| Number of ADC channels | 2 |
| Number of DAC channels | 4 |
| Maximum sampling rate | 192 kHz |
| PLL lock time | 20 ms |
The device supports sampling rates up to 192 kHz.
The ADAU1701 includes two ADCs.
The PLL lock time is specified as 20 ms.