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
EIGHT 192 kHz DACs
    Four independent stereo DAC pairs
    7.1 surround sound or 5.1 stereo out plus independent
        headphone
    Independent 8, 11.025, 16, 22.05, 32, 44.1,
        48, 88.2, 96, 176.4, and 192 kHz sample rates
    16, 20, and 24-bit PCM resolution
    Selectable stereo mixer on outputs
   
FOUR 96 kHz ADCs
    Two independent stereo ADC pairs
    Simultaneous record of up to four channels
    Independent 8, 11.025, 16, 22.05, 32, 44.1,
        48, 88.2, and 96 kHz sample rates
    16, 20, and 24-bit PCM resolution
    Support for quad microphone arrays
   
S/PDIF OUTPUT
    Supports 44.1, 48, 88.2, 96, 176.4, 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
   
ENHANCED FEATURES
    Three 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
    Four independent microphone bias pins
    Digital and analog PCBeep
    C/LFE channel swapping
    Two general-purpose digital I/O (GPIO) pins
    Advanced power management modes
    48-lead, Pb-free LFCSP_VQ package