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

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

otherwise under any patent or patent rights of Analog Devices.

a

AD1853*

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

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

Stereo, 24-Bit, 192 kHz, Multibit

DAC

FEATURES

5 V Stereo Audio DAC System

Accepts 16-/18-/20-/24-Bit Data

Supports 24 Bits and 192 kHz Sample Rate

Accepts a Wide Range of Sample Rates Including:

32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz and 192 kHz

Multibit Sigma-Delta Modulator with “Perfect Differential

Linearity Restoration” for Reduced Idle Tones and

Noise Floor

Data Directed Scrambling DAC—Least Sensitive to Jitter

Differential Output for Optimum Performance

120 dB Signal to Noise (Not Muted) at 48 kHz

(A-Weighted Mono)

117 dB Signal to Noise (Not Muted) at 48 kHz

(A-Weighted Stereo)

119 dB Dynamic Range (Not Muted) at 48 kHz Sample

Rate (A-Weighted Mono)

116 dB Dynamic Range (Not Muted) at 48 kHz Sample

Rate (A-Weighted Stereo)

–107 dB THD+N (Mono Application Circuit, See Figure 30)

–104 dB THD+N (Stereo)

115 dB Stopband Attenuation (96 kHz)

On-Chip Clickless Volume Control

Hardware and Software Controllable Clickless Mute

Serial (SPI) Control for: Serial Mode, Number of Bits,

Interpolation Factor, Volume, Mute, De-Emphasis, Reset

Digital De-Emphasis Processing for 32, 44.1 and 48 kHz

Sample Rates

Clock Auto-Divide Circuit Supports Five Master-Clock

Frequencies

Flexible Serial Data Port with Right-Justified, Left-

28-Lead SSOP Plastic Package

PRODUCT OVERVIEW

The AD1853 is a complete high performance single-chip stereo

digital audio playback system. It is comprised of a high per-

formance digital interpolation filter, a multibit sigma-delta

modulator, and a continuous-time current-out analog DAC

section. Other features include an on-chip clickless stereo at-

tenuator and mute capability, programmed through an SPI-

compatible serial control port. The AD1853 is fully compatible

with all known DVD formats and supports 48 kHz, 96 kHz and

192 kHz sample rates with up to 24 bits word lengths. It also

provides the “Redbook” standard 50

µs/15 µs digital de-emphasis

filters at sample rates of 32 kHz, 44.1 kHz and 48 kHz.

The AD1853 has a very flexible serial data input port that

allows for glueless interconnection to a variety of ADCs, DSP

chips, AES/EBU receivers and sample rate converters. The

AD1853 can be configured in left-justified, I

or DSP serial port compatible modes. The AD1853 accepts

serial audio data in MSB first, twos complement format.

The AD1853 operates from a single +5 V power supply. It is

fabricated on a single monolithic integrated circuit and is housed in

a 28-lead SSOP package for operation over the temperature

range 0

°C to +70°C.

FUNCTIONAL BLOCK DIAGRAM

SERIAL

DATA

INTERFACE

8

INTERPOLATOR

SERIAL CONTROL

INTERFACE

AUTO-CLOCK

DIVIDE CIRCUIT

VOLUME

MUTE

CONTROL DATA

INPUT

3

2

DIGITAL

SUPPLY

CLOCK

IN

ANALOG

OUTPUTS

2

2

ZERO

FLAG

ANALOG

SUPPLY

DE-EMPHASIS

MUTE

RESET

2

SERIAL

MODE

DIGITAL

DATA INPUT

AD1853

MULTIBIT SIGMA-

DELTA MODULATOR

ATTEN/

MUTE

IDAC

MULTIBIT SIGMA-

DELTA MODULATOR

8

INTERPOLATOR

ATTEN/

MUTE

VOLTAGE

REFERENCE

IDAC

INT2

INT4

APPLICATIONS

Hi End: DVD, CD, Home Theater Systems, Automotive

Audio Systems, Sampling Musical Keyboards, Digital

Mixing Consoles, Digital Audio Effects Processors

*Patents Pending.