REV. PrA
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
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.
a
AD1835
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002
2 ADC, 8 DAC,
96 kHz, 24-Bit H9018-H9004 Codec
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 One DAC
Supports 16-/20-/24-Bit Word Lengths
Multibit Sigma-Delta 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: –92 dB THD + N, 100 dB SNR,
and Dynamic Range
DACs: –95 dB THD + N, 110 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 H11547 f
S
, 512 H11547 f
S,
and 768 H11547 f
S
Master
Mode Clocks
Power-Down Mode Plus Soft Power-Down Mode
Flexible Serial Data Port with Right-Justified, Left-
Justified, I
2
S-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
FUNCTIONAL BLOCK DIAGRAM
OUTLP1
OUTLN1
CONTROL PORT
CLOCK
FILTD
FILTR
ADCLP
ADCLN
ADCRP
ADCRN
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
DSDATA4
MCLKASDATAABCLKALRCLKODVDDDVDD AVDDAVDDDVDD
AGND AGNDAGNDAGNDDGNDDGND
CINCLATCHCCLK COUT
DIGITAL
FILTER
PD/RST M/S
H9018-H9004
ADC
V
REF
VOLUME
SERIAL DATA
I/O PORT
DIGITAL
FILTER
OUTRP1
OUTRN1VOLUME
OUTLP2
OUTLN2
VOLUME
DIGITAL
FILTER OUTRP2
OUTRN2
VOLUME
OUTLP3
OUTLN3
VOLUME
DIGITAL
FILTER
OUTRP3
OUTRN3
VOLUME
OUTLP4
OUTLN4
VOLUME
DIGITAL
FILTER
OUTRP4
OUTRN4
VOLUME
DIGITAL
FILTER
H9018-H9004
ADC
H9018-H9004
DAC
H9018-H9004
DAC
H9018-H9004
DAC
H9018-H9004
DAC
PRODUCT OVERVIEW
The AD1835 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,
(Continued on Page 11 )
SHARC is a registered trademark of Analog Devices, Inc.