GENERAL DESCRIPTION

The AD1984A audio codec and SoundMAX® software provide superior high definition audio quality that exceeds Vista Premium performance. The AD1984A has two 192 kHz DAC pairs, two 192 kHz ADC pairs, an S/PDIF output, a 2-channel digital microphone interface, and digital and analog PCBeep. These features make the AD1984A the right choice for desktop and notebook PCs where performance is key.

FEATURES

Microsoft Vista Premium Logo for desktop

96+ dB audio outputs, 90 dB audio inputs

WLP 3.0 and 4.0

Security feature prevents unauthorized recording

2 stereo headphone amplifiers

Internal 32-bit arithmetic for greater accuracy

Impedance and presence detection on all jacks

Full analog mixer with DAC inputs

3 independent microphone bias pins

Digital and analog PCBeep

3 general-purpose digital I/O (GPIO) pins

3.3 V analog supply voltage

1.7 V to 1.9 V or 3.3 V digital supply voltages

1.5 V or 3.3 V HD Audio link signaling voltage

Advanced power management modes

48-lead, RoHS compliant LFCSP_VQ package

192 kHz DACs/ADCs

2 independent stereo DAC/ADC pairs

Simultaneous record of 2 stereo channels

Simultaneous playback of 2 stereo channels

Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz

sample rates

16-, 20-, and 24-bit resolution

Selectable stereo mixer on outputs

STEREO DIGITAL MICROPHONE INTERFACE

Two 192 kHz digital microphone channels

Supports 1 or 2 microphones per pin

Selectable bit clock rates of 1.5 MHz, 2.0 MHz, and 3.0 MHz

Mono and stereo array support

8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz,

48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz

sample rates

16-, 20-, and 24-bit resolution

S/PDIF OUTPUT

Supports 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and

192 kHz sample rates

16-, 20-, and 24-bit data; PCM and AC3 formats

Digital PCM gain control

AUXILIARY PINS

Stereo CD/auxiliary I/O port with ground sense

Stereo auxiliary/dock I/O port

Mono out pin for internal speakers or telephony