GENERAL DESCRIPTION

The AD1852 is a complete, high performance, single-chip, stereo digital, audio playback system. It is comprised of a multibit, Σ-Δ modulator, digital interpolation filters, and analog output drive circuitry. Other features include an on-chip, stereo attenuator and mute, programmed through an SPI-compatible serial control port. The AD1852 is fully compatible with all known DVD formats, including 192 kHz, as well as 96 kHz sample frequencies and 24 bits. It is also backwards compatible by supporting 50 μs/15 μs digital de-emphasis intended for Red Book compact discs, as well as de-emphasis at 32 kHz and 48 kHz sample rate.

FEATURES

  5 V stereo audio DAC system

  Accepts 16-bit/18-bit/20-bit/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 Σ-Δ modulator with perfect differential linearity restoration for reduced idle tones and noise floor

  Data-directed scrambling DAC—least sensitive to jitter

  Differential output for optimum performance

  117 dB signal-to-noise (not muted) at 48 kHz sample rate (A-weighted mono)

  114 dB signal-to-noise (not muted) at 48 kHz sample rate (A-weighted stereo)

  117 dB dynamic range (not muted) at 48 kHz sample rate (A-weighted mono)

  114 dB dynamic range (not muted) at 48 kHz sample rate (A-weighted stereo)

  −105 dB THD+N (mono application circuit)

  −102 dB THD+N (stereo)

  115 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-emp

  Digital de-emphasis processing for 32 kHz, 44.1 kHz, 48 kHz sample rates

  Clock autodivide circuit supports five master-clock frequencies

  Flexible serial data port with right-justified, left-justified, I2S-compatible and DSP serial port modes

  28-Lead SSOP plastic package

 

APPLICATIONS

  High end

    DVDs, CDs, home theater systems, automotive, audio systems, sampling musical keyboards, digital mixing consoles, and digital audio effects processors