Multichannel 96 kHz Codec
AD1836A
FEATURES
5 V multichannel audio system
Accepts 16-/18-/20-/24-bit data
Supports 24-bit and 96 kHz sample rate
Multibit Σ-∆ modulators with data directed
scrambling
Differential output for optimum performance
ADCs: –92 dB THD + N, 105 dB SNR and dynamic range
DACs: –95 dB THD + N, 108 dB SNR and dynamic range
On-chip volume control with "auto-ramp" function
Programmable gain amplifier for ADC input
Hardware and software controllable clickless mute
Digital de-emphasis processing
Supports 256 × fS, 512 × fS, or 768 × fS master clock
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 (PQFP) plastic package
APPLICATIONS
Home theater systems
Automotive audio systems
DVD recorders
Set-top boxes
Digital audio effects processors
PRODUCT OVERVIEW
The AD1836A is a high performance, single-chip codec that
provides three stereo DACs and two stereo ADCs using ADI’s
patented multibit Σ-∆ architecture. An SPI® port is included,
allowing a microcontroller to adjust volume and many other
parameters. The AD1836A operates from a 5 V supply, with
provision for a separate output supply to interface with low
voltage external circuitry. The AD1836A is available in a 52-lead
MQFP (PQFP) package.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL
FILTER
Σ-∆
DAC
DAC1L
DAC1R
CLOCK
MCLK
COUT
V
REF
CONTROL PORT
CCLK CDATA CLATCH
SERIAL
DATA
I/O
PORT
DIGITAL
FILTER
Σ-∆
ADC1L
48kHz/96kHz
PGA
Σ-∆
ADC2L
48kHz
DIGITAL
FILTER
48kHz
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
ALRCLK
ABCLK
ASDATA1
ASDATA2
CAPL1
CAPL2
CAPR1
CAPR2
PD/RST AVDD AGND DVDD DGND
2432
MUX
PGA
Σ-∆
ADC2R
48kHz
DIGITAL
FILTER
48kHz
DIGITAL
FILTER
Σ-∆
DAC
DAC2L
DAC2R
VOLUME
DIGITAL
FILTER
Σ-∆
DAC
DAC3L
DAC3R
FILTR
ADC1L
ADC1R
ADC2L1
ADC2L2
ADC2R1
ADC2R2
MUX
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
FILTD
48kHz/96kHz
DIGITAL
FILTER
Σ-∆
ADC1R
48kHz/96kHz 48kHz/96kHz
Figure 1.
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.
Specifications subject to change without notice. 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 owners.
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.
Rev. 0
AD1836A
Rev. 0 | Page 22 of 24
AD1836A
ADC2L
C1
1nF
C2
1nF
LEFT
INPUT NO. 1
LEFT
INPUT NO. 2
CAP1L
INPUT SELECT
250Ω
PGA
–
+
–
+
VREF
250Ω
MUX
CAP2L
GAIN SELECT
POWER-DOWN
NOTE
ADC2 SINGLE-ENDED MUX PGA INPUT MODE––LEFT CHANNEL ONLY SHOWN.
CONTROL REGISTER 3 CONTENTS: 6 LSBs: SELECT INPUT NO. 1: 11 1010
SELECT INPUT NO. 2: 11 1111
VREF
Figure 13. Single-Ended MUX/PGA Mode
AD1836A
ADC2L
C1
1nF
C2
1nF
LEFT + VE
INPUT
LEFT – VE
INPUT
CAP1L
–
+
–
+
V
REF
PGA
GAIN SELECT
250Ω
250Ω
CAP2L
NOTE
ADC2 DIFFERENTIAL PGA INPUT MODE—LEFT CHANNEL ONLY SHOWN.
CONTROL REGISTER 3 CONTENTS: 6 LSBs: 00 1010
POWER-DOWN
Figure 14. Differential PGA Mode
AD1836A
Rev. 0 | Page 23 of 24
OUTLINE DIMENSIONS
SEATING
PLANE
V
IEW
A
0.23
0.11
2.45
MAX
1.03
0.88
0.73
TOP VIEW
(PINS DOWN)
1
39
40
13
14
27
26
52
PIN 1
0.65 BSC
13.45
13.20
12.95
10.20
10.00
9.80
SQ
7.80
REF S
Q
0.40
0.22
VIEW A
ROTATED 90° CCW
7°
0°
2.20
2.00
1.80 0.13 MIN
COPLANARITY
COMPLIANT TO JEDEC STANDARDS M-022-AC
Figure 15. 52-Lead Plastic Quad Flat Package [MQFP]
(S-52A)
Dimensions shown in millimeters
ESD 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 this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
ORDERING GUIDE
AD1836A Products Temperature Package Package Description Package Option
AD1836AAS –40°C to +85°C Ambient 52-Lead MQFP S-52A
AD1836AASRL –40°C to +85°C Ambient 52-Lead MQFP S-52A on 13" Reels
AD1836ACS –40°C to +85°C Ambient 52-Lead MQFP S-52A
AD1836ACSRL –40°C to +85°C Ambient 52-Lead MQFP S-52A on 13" Reels
EVAL-AD1836AEB Evaluation Board
AD1836A
Rev. 0 | Page 24 of 24
NOTES
© 2003 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C03800–0–8/03(0)
