GENERAL DESCRIPTION

The AD1838A is a high performance single-chip codec featuring three stereo DACs and one stereo ADC. Each DAC comprises a high performance digital interpolation filter, a multibit
- 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
- modulators and decimation filters.

The AD1838A also contains an on-chip reference with a nominal value of 2.25 V.

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
- Modulators with Perfect Differential Linearity Restoration for Reduced Idle Tones and Noise Floor

Data Directed Scrambling DACs—Least Sensitive to Jitter

Differential Output for Optimum Performance

ADCs: –95 dB THD + N, 105 dB SNR and Dynamic Range

DACs: –95 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 Plus Soft Power-Down Mode

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

TDM Interface Mode Supports 8 In/8 Out 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 Processors