PRODUCT OVERVIEW

The AD1853 is a complete high performance single-chip stereo digital audio playback system. It is comprised of a high performance digital interpolation filter, a multibit sigma-delta modulator, and a continuous-time current-out analog DAC section. Other features include an on-chip clickless stereo attenuator and mute capability, programmed through an SPIcompatible serial control port. The AD1853 is fully compatible with all known DVD formats and supports 48 kHz, 96 kHz and 192 kHz sample rates with up to 24 bits word lengths. It also provides the “Redbook” standard 50 µs/15 µs digital de-emphasis filters at sample rates of 32 kHz, 44.1 kHz and 48 kHz.

FEATURES

5 V Stereo Audio DAC System

Accepts 16-/18-/20-/24-Bit Data

Supports 24 Bits and 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

Differential Output for Optimum Performance

120 dB Signal to Noise (Not Muted) at 48 kHz (A-Weighted Mono)

117 dB Signal to Noise (Not Muted) at 48 kHz (A-Weighted Stereo)

119 dB Dynamic Range (Not Muted) at 48 kHz Sample Rate (A-Weighted Mono)

116 dB Dynamic Range (Not Muted) at 48 kHz Sample Rate (A-Weighted Stereo)

–107 dB THD+N (Mono Application Circuit, See Figure 30)

–104 dB THD+N (Stereo)

115 dB Stopband Attenuation (96 kHz)

On-Chip Clickless Volume Control

Hardware and Software Controllable Clickless Mute

Serial (SPI) Control for: Serial Mode, Number of Bits, Interpolation Factor, Volume, Mute, De-Emphasis, Reset

Digital De-Emphasis Processing for 32, 44.1 and 48 kHz Sample Rates

Clock Auto-Divide Circuit Supports Five Master-Clock Frequencies

Flexible Serial Data Port with Right-Justified, LeftJustified, I2S-Compatible and DSP Serial Port Modes

28-Lead SSOP Plastic Package

APPLICATIONS

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