AD1986 is an AC '97 audio codec that supports 5.1 surround, double rate audio (Fs = 96 kHz), dynamic range greater than 90 dB, 20-bit resolution, and Line-level mono phone input, High quality CD input, Selectable MIC input w/preamp, AUX and line-in stereo inputs.
The AD1986 is an AC’97‑compliant audio codec featuring six DAC channels for 5.1 surround sound, integrated headphone amplifiers, a parametric equalizer, and support for variable sample rates up to 96 kHz. It includes jack‑sense, automatic topology switching, and multiple VREF_OUT pins to reduce external components.
The document contains a functional block diagram, detailed register descriptions, electrical specifications, power‑down states, and clock requirements. Tables list analog and digital performance parameters such as resolution, dynamic range, THD, and supply current.
| Sample Rate | 48 kHz (typ), up to 96 kHz double‑rate |
|---|---|
| ADC Resolution | 20 Bits |
| DAC Resolution | 24 Bits |
| ADC Dynamic Range | -85 dB |
| ADC THD | -95 dB |
| Analog Supply Voltage | 5.0 V ±10 % |
| Digital Supply Voltage | 3.3 V ±10 % |
| Input Impedance | 20 kΩ |
| Output Impedance (Surround, Center/LFE, Mono) | 300 Ω |
The AD1986 supports variable sample rates from 7 kHz up to 96 kHz for double‑rate audio.
The AD1986 provides six DAC channels for 5.1 surround sound.
The input impedance is specified as 20 kΩ.