GENERAL DESCRIPTION

The AD1839A is a high performance single-chip codec that features three stereo DACs and one stereo ADC. Each DAC comprises a high performance digital interpolation filter, a multibit Σ-∆ modulator featuring Analog Devices’ patented technology, and a continuous-time voltage-out analog section. Each DAC has independent volume control and clickless mute functions. The ADC comprises two 24-bit conversion channels with multibit Σ-∆ modulators and decimation filters.

FEATURES

5 V stereo audio system with 3.3 V tolerant digital interface

Supports up to 96 kHz sample rates

192 kHz sample rate available on 1 DAC

Supports 16-/20-/24-bit word lengths

Multibit Σ-∆ modulators with perfect differential linearity

restoration for reduced idle tones and noise floor

Data-directed scrambling DACs—least sensitive to jitter

Single-ended output

ADCs: −95 dB THD + N, 105 dB SNR and dynamic range

DACs: −92 dB THD + N, 108 dB SNR and dynamic range

On-chip volume controls per channel with 1024-step linear

scale

DAC and ADC software controllable clickless mutes

Digital de-emphasis processing

Supports 256 × fS, 512 × fS, and 768 × fS master mode clocks

Power-down mode and soft power-down mode

Flexible serial data port with right-justified, left-justified,

I2S compatible, and DSP serial modes

TDM interface mode supports 8-in/8-out operation using a

single SHARC® SPORT

52-lead MQFP plastic package

APPLICATIONS

DVD video and audio players

Home theater systems

Automotive audio systems

Audio/visual receivers

Digital audio effects process