AD1838A Analog Devices, AD1838A Datasheet

AD1838A

Manufacturer Part Number

AD1838A

Description

2 ADC, 6 DAC 96 Khz, 24-Bit Sigma Delta Codec

Manufacturer

Analog Devices

Datasheet

1.AD1838A.pdf (24 pages)

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REV. A

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. Trademarks and

registered trademarks are the property of their respective owners.

FEATURES

5 V Stereo Audio System with 3.3 V Tolerant

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

Data Directed Scrambling DACs—Least

Differential Output for Optimum Performance

On-Chip Volume Controls per Channel with

DAC and ADC Software Controllable Clickless Mutes

Digital De-emphasis Processing

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

Digital Interface

Perfect Differential Linearity Restoration for

Reduced Idle Tones and Noise Floor

Sensitive to Jitter

ADCs: –95 dB THD + N, 105 dB SNR and

DACs: –95 dB THD + N, 108 dB SNR and

1024 Step Linear Scale

Mode Clocks

Justified, I

Single SHARC

Dynamic Range

AAUXDATA3

DAUXDATA

S Compatible, and DSP Serial Port Modes

DSDATA1

DSDATA2

DSDATA3

DLRCLK

ADCRN

DBCLK

ADCLN

ADCRP

ADCLP

, 512

SPORT

DVDD

ADC

, and 768

−∆

ODVDD

ALRCLK

DIGITAL

FILTER

FUNCTIONAL BLOCK DIAGRAM

Master

SERIAL DATA

I/O PORT

DGND

ABCLK

DGND

ASDATA

AGND

CCLK

AGND

CONTROL PORT

CLATCH

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 nomi-

nal value of 2.25 V.

The AD1838A contains a flexible serial interface that allows

glueless connection to a variety of DSP chips, AES/EBU

receivers, and sample rate converters. The AD1838A can be

configured in left-justified, right-justified, I

patible serial modes. Control of the AD1838A is achieved by

means of an SPI

can be operated from a single 5 V supply, it also features a sepa-

rate supply pin for its digital interface that allows the device to

be interfaced to other devices using 3.3 V power supplies.

The AD1838A is available in a 52-lead MQFP package and is

specified for the industrial temperature range of –40ºC to +85ºC.

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

Tel: 781/329-4700

Fax: 781/326-8703

APPLICATIONS

DVD Video and Audio Players

Home Theater Systems

Automotive Audio Systems

Audio/Visual Receivers

Digital Audio Effects Processors

AGND AGND

VOLUME

CIN

AD1838A

COUT

96 kHz, 24-Bit - Codec

MCLK

CLOCK

DIGITAL

FILTER

compatible serial port. While the AD1838A

PD/RST M/S

DAC

REF

AVDD

2 ADC, 6 DAC,

AD1838A

OUTLP1

OUTLN1

OUTRP1

OUTRN1

OUTLP2

OUTLN2

OUTRP2

OUTRN2

OUTLP3

OUTLN3

OUTRP3

OUTRN3

FILTD

FILTR

S, or DSP com-

www.analog.com

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