AD1984A is a high definition audio decoder produced by Analog Devices. It supports Microsoft Vista Premium Logo, has 96+ dB audio output and 90 dB audio input, supports WLP 3.0 and 4.0 security features, and can prevent unauthorized recording.
The AD1984A is a high‑definition audio codec featuring two 192 kHz DAC pairs, two 192 kHz ADC pairs, an S/PDIF output, a 2‑channel digital microphone interface, and digital/analog PCBeep. It is offered in a 48‑lead RoHS‑compliant LFCSP_VQ package for desktop and notebook PCs.
The document provides detailed specifications including sample‑rate support up to 192 kHz, 24‑bit resolution, power‑supply requirements, performance metrics such as THD+N and SNR, as well as pin‑out tables, jack configurations, and absolute maximum ratings.
| Resolution | 24 bits |
|---|---|
| Analog Supply Voltage | 3.3 V ±5 % |
| Digital Supply Voltage | 3.3 V ±10 % |
| Line‑Out THD+N | -86 dB |
| Signal‑to‑Noise Ratio | 96 dB |
Both the ADC and DAC sections operate at 24‑bit resolution.
The line‑out THD+N is specified as –86 dB.