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GENERAL DESCRIPTION

The AD1837A is a high performance single-chip codec featuring four stereo DACs and one stereo ADC. Each DAC comprises a high performance digital interpolation filter, a multibit Σ-Δ 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 S-D 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-Δ Modulators with

Perfect Differential Linearity Restoration for

Reduced Idle Tones and Noise Floor

Data Directed Scrambling DACs—Least

Sensitive to Jitter

Single-Ended Outputs

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 x fS, 512 x fS, and 768 x 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