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