AD1837 Analog Devices, AD1837 Datasheet

AD1837

Manufacturer Part Number

AD1837

Description

2 ADC, 8DAC 96 Khz, 24-Bit Sigma Delta Codec

Manufacturer

Analog Devices

Datasheet

1.AD1837.pdf (24 pages)

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Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

SHARC is a registered trademark of Analog Devices, Inc.

REV. PrA

Preliminary Technical Data

FEATURES

5 V Stereo Audio System with 3.3 V Tolerant Digital

Supports up to 96 kHz Sample Rates

192 kHz Sample Rate available on one DAC

Supports 16-/20-/24-Bit Word Lengths

Multibit Sigma-Delta Modulators with

Data Directed Scrambling DACs—Least Sensitive to

Differential Output for Optimum Performance

On-Chip Volume Controls Per Channel with

DAC and ADC Software Controllable Clickless Mutes

Digital De-Emphasis Processing

Interface

“Perfect Differential Linearity Restoration” for

Reduced Idle Tones and Noise Floor

Jitter

ADCs: –93 dB THD + N, 100 dB SNR and Dynamic

Range

DACs: –90 dB THD + N, 108 dB SNR and Dynamic

Range

1024 Step Linear Scale

DSDATA1

DSDATA2

DSDATA3

DSDATA4

DLRCLK

DBCLK

ADCRP

ADCRN

ADCLP

ADCLN

DVDD

PRELIMINARY TECHNICAL DATA

DVDD

ADC

Σ-∆

ODVDD

ALRCLK

DIGITAL

FILTER

FUNCTIONAL BLOCK DIAGRAM

SERIAL DATA

I/O PORT

DGND

ABCLK

DGND

ASDATA

AGND

CCLK

CONTROL PORT

CLATCH

AGND

PRODUCT OVERVIEW

The AD1837 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 sigma-

delta modulator featuring Analog Devices’ patented technology,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

Supports 256

Power-Down Mode Plus Soft Power-Down Mode

Flexible Serial Data Port with Right-Justified, Left-

TDM Interface Mode Supports 8 In/8 Out Using a

52-Lead MQFP Plastic Package

APPLICATIONS

DVD Video and Audio Players

Home Theatre Systems

Automotive Audio Systems

Audio/Visual Receivers

Digital Audio Effects Processors

Clocks

Justified, I

Single SHARC

VOLUME

AGND AGND

CIN

COUT

96 kHz, 24-Bit - Codec

CLOCK

MCLK

S-Compatible and DSP Serial Port Modes

DIGITAL

FILTER



SPORT

, 512

PD/RST M/S

DAC

REF

Σ-∆

AVDD

and 768

2 ADC, 8 DAC,

AVDD

OUTL1

OUTR1

OUTL2

OUTR2

OUTL3

OUTR3

OUTL4

OUTR4

FILTD

FILTR

AD1837

(Continued on Page 10)

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