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Электронный компонент: AD1836AASRL

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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 - 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 f
S
, 512 f
S
, or 768 f
S
master clock
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 (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 - 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
-
DAC
DAC1L
DAC1R
CLOCK
MCLK
COUT
V
REF
CONTROL PORT
CCLK
CDATA CLATCH
SERIAL
DATA
I/O
PORT
DIGITAL
FILTER
-
ADC1L
48kHz/96kHz
PGA
-
ADC2L
48kHz
DIGITAL
FILTER
48kHz
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
ALRCLK
ABCLK
ASDATA1
ASDATA2
CAPL1
CAPL2
CAPR1
CAPR2
PD/RST
AVDD
AGND
DVDD
DGND
2
4
3
2
MUX
PGA
-
ADC2R
48kHz
DIGITAL
FILTER
48kHz
DIGITAL
FILTER
-
DAC
DAC2L
DAC2R
VOLUME
DIGITAL
FILTER
-
DAC
DAC3L
DAC3R
FILTR
ADC1L
ADC1R
ADC2L1
ADC2L2
ADC2R1
ADC2R2
MUX
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
FILTD
48kHz/96kHz
DIGITAL
FILTER
-
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
TABLE OF CONTENTS
AD1836A--Specifications ............................................................... 3
Absolute Maximum Ratings............................................................ 8
Pin Configuration And Pin Functional Descriptions.................. 9
Functional Overview...................................................................... 11
ADCs............................................................................................ 11
DACs ............................................................................................ 11
Clock Signals ............................................................................... 11
Reset and Power-Down ............................................................. 12
Serial Control Port ..................................................................... 12
Power Supply and Voltage Reference....................................... 13
Serial Data Ports--Data Format............................................... 13
SPI Control Registers................................................................. 19
Outline Dimensions ....................................................................... 23
ESD Caution................................................................................ 23
Ordering Guide .......................................................................... 23
REVISION HISTORY
Revision 0: Initial Version
Rev. 0 | Page 2 of 24
AD1836A
AD1836A--SPECIFICATIONS
Table 1. Test conditions, unless otherwise noted. Performance of all channels is identical (exclusive of the Interchannel Gain
Mismatch and Interchannel Phase Deviation specifications).
Parameter Rating
Supply Voltages (AVDD, DVDD)
5 V
Ambient Temperature
25C
Master Clock
12.288 MHz (48 kHz f
S
, 256 f
S
Mode)
Input Signal
1.000 kHz, 0 dBFS (Full Scale)
Input Sample Rate
48 kHz
Measurement Bandwidth
20 Hz to 20 kHz
Word Width
24 Bits
Load Capacitance (Digital Output)
100 pF
Load Impedance (Digital Output)
2.5 k
Input Voltage HI
2.4 V
Input Voltage LO
0.8 V
Rev. 0 | Page 3 of 24
AD1836A
Rev. 0 | Page 4 of 24
Table 2. Analog Performance
Parameter
Min Typ
Max Unit
ADC Resolution (all ADCs)
24
Bits
Dynamic Range (20 Hz to 20 kHz, 60 dB Input)
1, 2
No Filter (RMS), AD1836AAS
97
102
dB
With A-Weighted Filter (RMS), AD1836AAS
100
105
dB
No Filter (RMS), AD1836ACS
94
99
dB
With A-Weighted Filter (RMS), AD1836ACS
97
102
dB
Total Harmonic Distortion + Noise (1 dBFS)
1
92
83
dB
Full-Scale Input Voltage (Differential)
2.18 (6.16)
V rms (V pp)
Gain Error
5.0
+5.0
%
Interchannel Gain Mismatch
0.1
+0.1
dB
Offset Error
10
0
+10
mV
Gain Drift
100
ppm/C
Interchannel Isolation
110
dB
Programmable Input Gain
12
dB
Gain Step Size
3
dB
CMRR, Direct Input, 100 mV RMS, 1 kHz
77
63
dB
CMRR, Direct Input, 100 mV RMS, 20 kHz
72
60
dB
CMRR, PGA Differential Input, 100 mV RMS, 1 kHz
57
39
dB
CMRR, PGA Differential Input, 100 mV RMS, 20 kHz
57
39
dB
Input Resistance
10
k
Input Capacitance
15
pF
ANALOG-TO-DIGITAL CONVERTERS
Common-Mode Input Volts
2.25
V
Dynamic Range (20 Hz to 20 kHz, 60 dB Input)
1, 2
No Filter (RMS), AD1836AAS
102
105
dB
With A-Weighted Filter (RMS), AD1836AAS
105
108
dB
No Filter (RMS), AD1836ACS
99
102
dB
With A-Weighted Filter (RMS), AD1836ACS
102
105
dB
Total Harmonic Distortion + Noise (0 dBFS)
1
95
85
dB
Full-Scale Output Voltage (Differential)
2.0 (5.6)
V rms (V pp)
Gain Error
6.0
+6.0
%
Interchannel Gain Mismatch
0.3
+0.3
dB
Offset Error
15
55
95
mV
Gain Drift
150
ppm/C
Interchannel Isolation
110
dB
Interchannel Phase Deviation
0.1
Degrees
Volume Control Step Size (1023 Linear Steps)
0.098
%
Volume Control Range (Max Attenuation)
60
dB
Max Attenuation
100
dB
De-emphasis Gain Error
0.1
dB
Output Resistance at Each Pin
115
DIGITAL-TO-ANALOG CONVERTERS
V
REF
(FILTR), Common-Mode Output
2.2
2.25
2.3
V
1
Total harmonic distortion + noise and dynamic range typical specifications are for two channels active, max/min are all channels active.
2
Measured with Audio Precision System Two Cascade in rms mode. Averaging mode will show approximately 2 dB better performance.
AD1836A
Table 3. Digital I/O
Parameter Min
Typ
Max
Unit
Input Voltage HI (V
IH
) 2.2
V
Input Voltage LO (V
IL
)
0.8
V
Input Leakage (I
IH
@ V
IH
= 2.4 V)
10
A
Input Leakage (I
IL
@ V
IL
= 0.8 V)
10
A
High Level Output Voltage (V
OH
) I
OH
= 2 mA
ODVDD 0.4
V
Low Level Output Voltage (V
OL
) I
OL
= 2 mA
0.5
V
Input Capacitance
20
pF
Table 4. Power Supplies
Parameter
Min Typ Max Unit
Voltage, DVDD and AVDD
4.75
5
5.25
V
Voltage, ODVDD
3.0
3.3/5
5.25
V
Analog Current
108
mA
Analog Current--Power-Down
47
mA
Digital Current
78
mA
Supplies
Digital Current--Power-Down
1.5
mA
Operation--Both Supplies
930
mW
Operation--Analog Supplies
540
mW
Operation--Digital Supplies
390
mW
Dissipation
Power-Down--Both Supplies
243
mW
1 kHz 300 mV p-p Signal at Analog Supply Pins
60
dB
Power Supply Rejection Ratio
20 kHz 300 mV p-p Signal at Analog Supply Pins
50
dB
Table 5. Temperature Range
Parameter Min
Typ
Max
Unit
Specifications Guaranteed
25
C
40
+85
C
Ambient
Functionality Guaranteed
40
+110 C
Case
Storage 65
+150
C
Table 6. Digital Filter @ 44.1 kHz
Parameter
Min Typ
Max Unit
Pass Band
20
kHz
Pass-Band Ripple
0.0001
dB
Transition Band
22
kHz
Stop Band
24
kHz
Stop-Band Attenuation
120
dB
ADC DECIMATION FILTER
Group Delay
990.20
s
Pass Band
20
kHz
Pass-Band Ripple
0.01
dB
Transition Band
22
kHz
Stop Band
24
kHz
Stop-Band Attenuation
70
dB
DAC INTERPOLATION FILTER
Group Delay
446.35
s
Rev. 0 | Page 5 of 24