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AD1838_15 Datasheet, PDF (1/24 Pages) Analog Devices – 2 ADC, 6 DAC, 96 kHz, 24-Bit Codec | |||
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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 âº-⬠Modulators with
Perfect Differential Linearity Restoration for
Reduced Idle Tones and Noise Floor
Data Directed Scrambling DACsâLeast
Sensitive to Jitter
Differential Output for Optimum Performance
ADCs: â95 dB THD + N, 105 dB SNR and
Dynamic Range
DACs: â95 dB THD + N, 108 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 Ø fS, 512 Ø fS, and 768 Ø fS Master
Mode Clocks
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
52-Lead MQFP Plastic Package
2 ADC, 6 DAC,
96 kHz, 24-Bit âº-⬠Codec
AD1838
APPLICATIONS
DVD Video and Audio Players
Home Theater Systems
Automotive Audio Systems
Audio/Visual Receivers
Digital Audio Effects Processors
PRODUCT OVERVIEW
The AD1838 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 âº-â¬
modulator featuring Analog Devicesâ 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
âº-⬠modulators and decimation filters.
The AD1838 also contains an on-chip reference with a nominal
value of 2.25 V.
The AD1838 contains a flexible serial interface that allows for
glueless connection to a variety of DSP chips, AES/EBU receiv-
ers, and sample rate converters. The AD1838 can be configured
in left-justified, right-justified, I2S, or DSP compatible serial
modes. Control of the AD1838 is achieved by means of an SPI®
compatible serial port. While the AD1838 can be operated from
a single 5 V supply, it also features a separate supply pin for its
digital interface that allows the device to be interfaced to other
devices using 3.3 V power supplies.
The AD1838 is available in a 52-lead MQFP package and is
specified for the industrial temperature range of â40ºC to +85ºC.
FUNCTIONAL BLOCK DIAGRAM
DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH CIN COUT MCLK PD/RST M/S AVDD AVDD
AAUXDATA3
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
DAUXDATA
ADCLP
ADCLN
ADCRP
ADCRN
âº-â¬
ADC
âº-â¬
ADC
SERIAL DATA
I/O PORT
DIGITAL
FILTER
DIGITAL
FILTER
CONTROL PORT
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
CLOCK
DIGITAL
FILTER
DIGITAL
FILTER
DIGITAL
FILTER
AD1838
âº-â¬
DAC
âº-â¬
DAC
âº-â¬
DAC
VREF
OUTLP1
OUTLN1
OUTRP1
OUTRN1
OUTLP2
OUTLN2
OUTRP2
OUTRN2
OUTLP3
OUTLN3
OUTRP3
OUTRN3
FI LTD
FI LTR
REV. A
DGND DGND AGND AGND AGND AGND
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 companies.
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 © 2003 Analog Devices, Inc. All rights reserved.
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