PRELIMINARYTECHNICAL DATA
2 ADC, 8 DAC,
a
Preliminary Technical Data
96 kHz, 24-Bit ꢀ-ꢁ Codec
AD1835
FEATURES
Supports 256 ꢂ fS, 512 ꢂ fS, and 768 ꢂ fS Master
Mode Clocks
5 V Stereo Audio System with 3.3 V Tolerant Digital
Interface
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
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
52-Lead MQFP Plastic Package
APPLICATIONS
DVD Video and Audio Players
Home Theater Systems
Automotive Audio Systems
Audio/Visual Receivers
Digital Audio Effects Processors
PRODUCT OVERVIEW
On-Chip Volume Controls per Channel with
1024-Step Linear Scale
DAC and ADC Software Controllable Clickless Mutes
Digital De-Emphasis Processing
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 )
FUNCTIONAL BLOCK DIAGRAM
DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH CIN COUT MCLK
AVDD AVDD
PD/RST M/S
DLRCLK
DBCLK
CONTROL PORT
CLOCK
OUTLP1
OUTLN1
OUTRP1
OUTRN1
OUTLP2
OUTLN2
OUTRP2
OUTRN2
OUTLP3
OUTLN3
OUTRP3
OUTRN3
OUTLP4
OUTLN4
OUTRP4
OUTRN4
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
ꢀ-ꢁ
DAC
DSDATA1
DSDATA2
DSDATA3
DSDATA4
DIGITAL
FILTER
SERIAL DATA
I/O PORT
ꢀ-ꢁ
DAC
DIGITAL
FILTER
ADCLP
ADCLN
ꢀ-ꢁ
ADC
DIGITAL
FILTER
DIGITAL
FILTER
ꢀ-ꢁ
DAC
DIGITAL
FILTER
ꢀ-ꢁ
DAC
ADCRP
ADCRN
ꢀ-ꢁ
ADC
DIGITAL
FILTER
FILTD
FILTR
V
REF
DGND DGND AGND AGND AGND AGND
SHARC is a registered trademark of Analog Devices, Inc.
REV. PrA
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
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may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002