PRODUCT OVERVIEW

The AD1855 is a high performance, single-chip stereo, audio DAC delivering 113 dB Dynamic Range and SNR (A-weighted—not muted) at 48 kHz sample rate. It is comprised of a multibit sigma-delta modulator with dither, continuous time analog filters and analog output drive circuitry.

FEATURES

5 V Stereo Audio DAC System

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

Supports 24 Bits and 96 kHz Sample Rate

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

113 dB Signal-to-Noise and Dynamic Range at 48 kHz Sample Rate

110 dB Signal-to-Noise and Dynamic Range at 96 kHz Sample Rate

–97 dB THD+N

On-Chip Volume Control with 1024 Steps

Hardware and Software Controllable Clickless Mute

Zero Input Flag Outputs for Left and Right Channels

Digital De-Emphasis Processing

Supports 128, 256, 384, and 512 3 FS Master Mode Clock

Switchable Clock Doubler

Power-Down Mode Plus Soft Power-Down Mode

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

28-Lead SSOP Plastic Package

APPLICATIONS

DVD, CD, Set-Top Boxes, Home Theater Systems, Automotive Audio Systems, Computer Multimedia Products, Sampling Musical Keyboards, Digital Mixing Consoles, Digital Audio Effects Processors