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
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