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