PRODUCT OVERVIEW
The AD1958 is a complete high-performance single-chip stereo digital audio playback system. It is comprised of a multibit sigmadelta modulator, digital interpolation filters, and analog output drive circuitry with an on-board dual PLL clock generator. Other features include an on-chip stereo attenuator and mute, programmed through an SPI-compatible serial control port. The AD1958 is fully compatible with all known DVD formats including 96 kHz and 192 kHz sample frequencies and 24 bits. It also is backwards-compatible by supporting 50 µs/15 µs digital de-emphasis for “redbook” compact discs, as well as de-emphasis at 32 kHz and 48 kHz sample rates.

FEATURES
    5 V Stereo Audio DAC System
    Accepts 16-/18-/20-/24-Bit Data
    Supports 24 Bits, 192 kHz Sample Rate
    Accepts a Wide Range of Sample Rates Including:
        32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, and 192 kHz
    Multibit Sigma-Delta Modulator with “Perfect Differential
        Linearity Restoration” for Reduced Idle Tones and
        Noise Floor
    Data Directed Scrambling DAC—Least Sensitive to Jitter
    Single-Ended Output for Easy Use
    108 dB Signal-to-Noise (Not Muted) at 48 kHz Sample
        Rate (A-Weighted Stereo)
    109 dB Dynamic Range (Not Muted) at 48 kHz Sample
    Rate (A-Weighted Stereo)
    –96 dB THD + N (Stereo)
    75 dB Stop Band Attenuation
    On-Chip Clickless Volume Control
    Hardware and Software Controllable Clickless Mute
    Serial (SPI) Control for: Serial Mode, Number of Bits,
        Sample Rate, Volume, Mute, De-Emphasis
    Digital De-Emphasis Processing for 32 kHz, 44.1 kHz,
        and 48 kHz Sample Rates
    Programmable Dual Fractional-N PLL Clock Generator
    27 MHz Master Clock Oscillator
    Better than 100 ps rms Master Clock Jitter
    Generated System Clocks
        SCLK0: 33.8688 MHz
        SCLK1: 22.5792 MHz, 24.576 MHz, 33.8688 MHz, or
        36.864 MHz
        SCLK2: 16.9344 MHz
    Flexible Serial Data Port with Right-Justified,
        Left-Justified, I2S-Compatible, and DSP Serial Port Modes
    28-Lead SSOP Plastic Package

APPLICATIONS
    DVD, CD, Home Theater Systems, Automotive Audio Systems, Sampling Musical Keyboards, Digital Mixing Consoles, Digital Audio Effects Processors