AD1835AS Analog Devices Inc, AD1835AS Datasheet

IC CODEC 2ADC/8DAC 24 BIT 52MQFP

AD1835AS

Manufacturer Part Number
AD1835AS
Description
IC CODEC 2ADC/8DAC 24 BIT 52MQFP
Manufacturer
Analog Devices Inc
Type
Stereo Audior
Datasheet

Specifications of AD1835AS

Rohs Status
RoHS non-compliant
Data Interface
Serial
Resolution (bits)
24 b
Number Of Adcs / Dacs
2 / 8
Sigma Delta
Yes
S/n Ratio, Adcs / Dacs (db) Typ
105 / 108
Dynamic Range, Adcs / Dacs (db) Typ
105 / 108
Voltage - Supply, Analog
4.5 V ~ 5.5 V
Voltage - Supply, Digital
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
52-BQFP
REV. B
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.
FEATURES
5 V Stereo Audio System with 3.3 V Tolerant
Supports up to 96 kHz Sample Rates
192 kHz Sample Rate Available on One 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
Dynamic Range
2
S Compatible, and DSP Serial Port Modes
DSDATA1
DSDATA2
DSDATA3
DSDATA4
DLRCLK
ADCRN
DBCLK
ADCLN
ADCRP
ADCLP
®
f
S
, 512
SPORT
DVDD
AD1835
f
S
DVDD
ADC
ADC
, and 768
-
-
ODVDD
ALRCLK
DIGITAL
DIGITAL
FILTER
FILTER
f
S
FUNCTIONAL BLOCK DIAGRAM
SERIAL DATA
Master
I/O PORT
DGND
ABCLK
DGND
ASDATA
AGND
CCLK
CONTROL PORT
AGND
CLATCH
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 -
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 AD1835 also contains an on-chip reference with a nominal
value of 2.25 V.
The AD1835 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 AD1835 can be configured
in left-justified, right-justified, I
modes. Control of the AD1835 is achieved by means of an
SPI compatible serial port. While the AD1835 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 AD1835 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
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
AGND AGND
CIN
COUT
96 kHz, 24-Bit - Codec
CLOCK
MCLK
DIGITAL
DIGITAL
DIGITAL
DIGITAL
FILTER
FILTER
FILTER
FILTER
© 2003 Analog Devices, Inc. All rights reserved.
PD/RST M/S
V
DAC
DAC
DAC
DAC
REF
-
-
-
-
2
AVDD
S, or DSP compatible serial
AVDD
2 ADC, 8 DAC,
OUTLP1
OUTLN1
OUTRP1
OUTRN1
OUTLP2
OUTLN2
OUTRP2
OUTRN2
OUTLP3
OUTLN3
OUTRP3
OUTRN3
OUTLP4
OUTLN4
OUTRP4
OUTRN4
FILTD
FILTR
AD1835
www.analog.com

Related parts for AD1835AS

AD1835AS Summary of contents

Page 1

FEATURES 5 V Stereo Audio System with 3.3 V Tolerant Digital Interface Supports kHz Sample Rates 192 kHz Sample Rate Available on One DAC Supports 16-/20-/24-Bit Word Lengths Multibit - Modulators with Perfect Differential Linearity Restoration for ...

Page 2

AD1835–SPECIFICATIONS TEST CONDITIONS Supply Voltages (AVDD, DVDD) 5.0 V Ambient Temperature 25°C 12.288 MHz (256 × f Input Clock ADC Input Signal 1.0078125 kHz, –1 dBFS (Full Scale) DAC Input Signal 1.0078125 kHz, 0 dBFS (Full Scale) Input Sample Rate ...

Page 3

Parameter ADC DECIMATION FILTER, 96 kHz* Pass Band Pass-Band Ripple Stop Band Stop-Band Attenuation Group Delay DAC INTERPOLATION FILTER, 48 kHz* Pass Band Pass-Band Ripple Stop Band Stop-Band Attenuation Group Delay DAC INTERPOLATION FILTER, 96 kHz* Pass Band Pass-Band Ripple ...

Page 4

AD1835 TIMING SPECIFICATIONS Parameter MASTER CLOCK AND RESET t MCLK High MH t MCLK Low ML PD/RST Low t PDR SPI PORT t CCLK High CCH t CCLK Low CCL t CCLK Period CCP t CDATA Setup CDS t CDATA ...

Page 5

Parameter TDM256 MODE (Master) t BCLK Delay TBD t FSTDM Delay FSD t ASDATA Delay TABDD t DSDATA1 Setup TDDS t DSDATA1 Hold TDDH TDM256 MODE (Slave) f BCLK Frequency AB t BCLK High TBCH t BCLK Low TBCL t ...

Page 6

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Model AD1835AS AD1835AS-REEL EVAL-AD1835EB CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD1835 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 7

DVDD CLATCH CIN PD/RST AGND OUTLN1 OUTLP1 OUTRN1 OUTRP1 AGND AVDD OUTLN2 OUTLP2 Pin No. Mnemonic 1, 39 DVDD 2 CLATCH 3 CIN PD/RST 4 5, 10, 16, 24, 30, 35 AGND 6, 12, 25, 31 OUTLNx 7, 13, 26, ...

Page 8

AD1835–Typical Performance Characteristics 0 –50 –100 –150 0 5 FREQUENCY (Normalized to TPC 1. ADC Composite Filter Response 5 0 –5 –10 –15 –20 –25 – FREQUENCY (Hz) TPC 2. ADC High-Pass Filter Response –50 ...

Page 9

FREQUENCY (kHz) TPC 7. DAC Composite Filter Response, f 0.10 0.05 0 –0.05 –0. FREQUENCY (kHz) TPC 8. DAC Composite Filter Response, f (Pass-Band Section) REV. B 0.2 0.1 0 ...

Page 10

AD1835 TERMINOLOGY Dynamic Range The ratio of a full-scale input signal to the integrated input noise in the pass band ( kHz), expressed in decibels (dB). Dynamic range is measured with a –60 dB input signal and ...

Page 11

FUNCTIONAL OVERVIEW ADCs There are two ADC channels in the AD1835, configured as a stereo pair. Each ADC has fully differential inputs. The ADC section can operate at a sample rate kHz. The ADCs include on-board ...

Page 12

AD1835 To maintain the highest performance possible recommended that the clock jitter of the master clock signal be limited to less than 300 ps rms, measured using the edge-to-edge technique. Even at these levels, extra noise or tones ...

Page 13

CLS t CLATCH CCP CCLK CIN D15 D14 t COE COUT LRCLK LEFT CHANNEL BCLK SDATA MSB LEFT CHANNEL LRCLK BCLK MSB SDATA LEFT CHANNEL LRCLK BCLK MSB SDATA LRCLK BCLK SDATA MSB NOTES 1. DSP MODE DOES NOT ...

Page 14

AD1835 t ABH ABCLK t ABL t ALS ALRCLK ASDATA LEFT-JUSTIFIED MSB MODE ASDATA MODE ASDATA RIGHT-JUSTIFIED MODE t DBH DBCLK t DBL t DLS DLRCLK t DDS DSDATA LEFT-JUSTIFIED MSB MODE t DDH DSDATA 2 I ...

Page 15

LRCLK BCLK ADC DATA LRCLK BCLK DAC DATA t t ABH ABP ABCLK t ABL t ALS ALRCLK t ALH t ADS ASDATA MSB t ADH Figure 9. ADC Packed Mode Timing REV. B 256 BCLKs 32 BCLKs SLOT 1 ...

Page 16

AD1835 2 Pin Name I 2 ASDATA ( DSDATA1 ( DSDATA2 (I)/AAUXDATA1 ( DSDATA3 (I)/AAUXDATA2 ( DSDATA4 (I)/AAUXDATA3 (I) I ALRCLK (O) LRCLK for ADC ABCLK (O) BCLK for ADC DLRCLK (I)/AUXLRCLK(I/O) ...

Page 17

LRCLK BCLK ADC 1 SLAVE DATA MCLK LRCLK BCLK ADC 1 SLAVE DATA MCLK LRCLK BCLK ADC 2 SLAVE DATA MCLK Figure 12. Aux Mode Connection to SHARC (Master Mode) LRCLK BCLK ADC 1 MASTER DATA MCLK LRCLK BCLK ADC ...

Page 18

AD1835 CONTROL/STATUS REGISTERS The AD1835 has 15 control registers which are used to set the operating mode of the part. The other two registers, ADC Peak 0 and ADC Peak 1, are read-only and should not be programmed. ...

Page 19

Register Register Address Name 0000 DACCTRL1 0001 DACCTRL2 0010 DACVOL1 0011 DACVOL2 0100 DACVOL3 0101 DACVOL4 0110 DACVOL5 0111 DACVOL6 1000 DACVOL7 1001 DACVOL8 1010 ADCPeak0 1011 ADCPeak1 1100 ADCCTRL1 1101 ADCCTRL2 1110 ADCCTRL3 1111 Reserved Address R/W RES De-Emphasis ...

Page 20

AD1835 Table VI. DAC Volume Control Address R/W RES DAC Volume 15, 14, 13 0010 = DACL1 0 0 0000000000 = 1/1024 0011 = DACR1 0000000001 = ...

Page 21

F 600Z 5.76k 5.76k AUDIO + INPUT 120pF NPO 100pF NPO OP275 V REF 5.76k 5.76k 750k OP275 V REF Figure 14. Typical ADC Input Filter Circuit REV. B 237 OUTLNx ADCxN 1nF NPO 100pF NPO OUTLPx 1nF NPO ...

Page 22

AD1835 SEATING PLANE VIEW A OUTLINE DIMENSIONS 52-Lead Metric Quad Flat Package [MQFP] (S-52) Dimensions shown in millimeters 13.45 1.03 13.20 SQ 2.45 0.88 12.95 MAX 0. 7.80 TOP VIEW REF (PINS DOWN) PIN 0.23 ...

Page 23

Revision History Location 7/03—Data Sheet changed from REV REV. B. Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 24

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