The ADAU1702 is a 28-bit/56-bit audio processor with two ADCs and four DACs. It has a processing power of 25 MIPS, two ADCs with 100 dB SNR and -83 dB THD+N, and four DACs with 104 dB SNR and -90 dB THD+N. The device has a fully standalone operating mode and can be self-booted from a serial EEPROM. It also features an auxiliary ADC, GPIOs, and a programmable SigmaStudio™ graphical tool.
The ADAU1702 is a single‑chip SigmaDSP audio processor that provides 28‑/56‑bit digital audio processing, two high‑performance ADCs and four DACs, and a built‑in microcontroller‑like control interface. It supports sampling rates up to 192 kHz and offers programmable signal‑processing blocks such as equalizers, dynamics processors, and speaker compensation.
The handbook covers the device’s features, applications, functional block diagram, detailed specifications, pin configurations, power and clock circuitry, digital timing diagrams, register maps, and programming procedures. It also includes mechanical dimensions, ordering information, and regulatory notes.
| ADC resolution | 24 Bits |
|---|---|
| ADC signal‑to‑noise ratio | 100 dB (A‑Weighted) |
| DAC signal‑to‑noise ratio | 104 dB (A‑Weighted) |
| Analog supply voltage (AVDD) | 3.3 V |
| Digital supply voltage (DVDD) | 1.8 V |
| Power dissipation (operation) | 286.5 mW |
| Operating temperature range | -40 °C to +130 °C |
| PLL lock time | 20 ms |
The device supports sampling rates up to 192 kHz.
The analog supply (AVDD) is 3.3 V and the digital supply (DVDD) is 1.8 V.