This document is about ADAV4622 audio processor. It supports SIF demodulator and broadcast stereo decoder, including NICAM (BG, DK, I, L), A2 (BG, DK, M), BTSC (M, N), EIAJ (M). It also has automatic sound IF standard detection, 28-bit audio processor, adjustable digital delay line, high performance 24-bit ADC and DAC, 94 dB DNR performance, dual headphone outputs and high performance pulse-width modulation (PWM) digital outputs.
The ADAV4622 audio processor targets advanced TV systems, providing sound IF (SIF) demodulation, broadcast stereo decoding, and a fully programmable 28‑bit audio engine. It supports multiple audio standards such as NICAM, A2, BTSC, and EIAJ, and includes features like automatic sound‑IF detection, digital delay for audio‑video sync, and high‑performance 24‑bit ADC/DAC.
The device is supplied in an 80‑lead LQFP package, operates from 3.3 V analog and 1.8 V digital core supplies, and offers extensive digital I/O, PWM outputs, headphone amplifiers, and sample‑rate converters. Detailed specifications, timing diagrams, and pin descriptions are provided for designers.
| Operating Temperature | -40 °C to +85 °C |
|---|---|
| Analog Supply Voltage (AVDD) | 3.3 V |
| Digital Core Supply Voltage (DVDD) | 1.8 V |
| ADC Channels | 4 |
| ADC Resolution | 24 bits |
| DAC Channels | 8 (four stereo) |
| DAC Resolution | 24 bits |
| Dynamic Range (ADC Stereo) | 95 dB A‑Weighted |
| Dynamic Range (DAC Stereo) | 94 dB A‑Weighted |
It supports NICAM (BG, DK, I, L), A2 (BG, DK, M), BTSC (M, N) and EIAJ (M).
The digital core operates from a 1.8 V DVDD supply.
It can operate from –40 °C up to +85 °C.