This document describes the features and characteristics of the AD1885 AC'97 SoundMAX® Codec, including variable sample rate audio, multiple codec configuration options, and external audio power-down control.
The AD1885 is a 16‑bit stereo full‑duplex AC'97 codec offering variable sample rates from 7.04 kHz to 48 kHz with 1 Hz resolution. It includes jack‑sense pins for automatic output switching, split 3.3 V digital/5 V analog supplies, and a PHAT™ stereo 3D enhancement feature.
The document provides detailed electrical specifications, timing parameters, pin descriptions, absolute maximum ratings, recommended grounding and layout practices, and package dimensions for the 48‑lead LQFP (ST‑48) version of the device.
| Sample Rate Range | 7040 Hz to 48 kHz (1 Hz resolution) |
|---|---|
| ADC/DAC Resolution | 16 bits |
| Analog Supply Voltage Range | 4.75 V to 5.25 V |
| Input Impedance | 20 kΩ |
The AD1885 supports sample rates up to 48 kHz with 1 Hz resolution.
The analog supply (AVpp) should be between 4.75 V and 5.25 V.
The device is supplied in a 48‑lead thin‑plastic quad flat‑pack (LQFP).
A 24.576 MHz crystal is used for the XTL_IN clock input.