AD1881A is an audio codec device that supports the AC'97 2.1 standard. It integrates 16-bit analog/digital converters and digital/analog converters, as well as audio input and output interfaces.
The AD1881A is an AC’97 SoundMAX audio codec designed for high‑performance PC audio applications, providing 16‑bit stereo full‑duplex conversion and a range of analog and digital features.
This handbook contains functional descriptions, pin‑function tables, timing parameters, electrical specifications, recommended circuit connections, and layout guidelines for integrating the codec.
| Input Voltage (RMS) LINE_IN, AUX, CD, VIDEO, PHONE_IN, PC_BEEP | 1 V rms (typ) |
|---|---|
| MIC with +20 dB Gain Input Voltage | 0.1 V rms (typ) |
| Sample Rate (FS) | 48 kHz |
| Digital Supply (VDD) | 3.3 V |
| Analog Supply (VCC) | 5.0 V |
| Power Dissipation (5 V/3.3 V) | 280 mW |
The typical RMS input voltage for LINE_IN (and other line inputs) is 1 V rms.
The device can operate up to 70 °C ambient temperature.
The recommended crystal input frequency is 24.576 MHz.