GENERAL DESCRIPTION The AD1987 audio codec and SoundMAX® software provides superior HD audio quality that exceeds Vista Premium performance. The AD1987 has eight DACs and four ADCs, three stereo headphone ports, C/LFE swapping, digital and analog PCBeep, and S/PDIF output, making the AD1987 the right choice for desktop PCs where performance is the primary consideration. FEATURES 3 stereo headphones Microsoft Vista Premium logo for desktop 95 dB audio outputs, 90 dB audio inputs Internal 32-bit arithmetic for greater accuracy Impedance and presence detection on all jacks Retaskable jacks 4 independent microphone bias pins Digital and analog PCBeep C/LFE channel swapping 2 general-purpose digital I/O (GPIO) pins Advanced power management modes 48-lead LFCSP_VQ package EIGHT 192 kHz DACs 4 independent stereo DAC pairs 7.1 surround sound or 5.1 stereo out plus independent headphone 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 PCM resolution Selectable stereo mixer on outputs FOUR 96 kHz ADCs 2 independent stereo ADC pairs Simultaneous record of up to 4 channels Independent 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz sample rates 16-, 20-, and 24-bit PCM resolution Support for quad microphone arrays 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, AC3 Digital PCM gain control DEDICATED AUXILIARY PINS Stereo CD/auxiliary I/O port w/GND sense Mono out pin for internal speakers or telephony
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