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96 kHz, 24-Bit Sigma-Delta Codec
AD1839A
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 1 DAC
Supports 16-/20-/24-bit word lengths
Multibit
Σ-∆
modulators with perfect differential linearity
restoration for reduced idle tones and noise floor
Data-directed scrambling DACs—least sensitive to jitter
Single-ended output
ADCs: −95 dB THD + N, 105 dB SNR and dynamic range
DACs: −92 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 × f
S
, 512 × f
S
, and 768 × f
S
master mode clocks
Power-down mode and soft power-down mode
Flexible serial data port with right-justified, left-justified,
I
2
S compatible, and DSP serial modes
TDM interface mode supports 8-in/8-out operation using a
single SHARC® SPORT
52-lead MQFP plastic package
GENERAL DESCRIPTION
The AD1839A is a high performance single-chip codec that
features three stereo DACs and one stereo ADC. Each DAC
comprises a high performance digital interpolation filter, a
multibit Σ-∆ 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 Σ-∆ modulators and decimation filters.
The AD1839A also contains an on-chip reference with a
nominal value of 2.25 V.
The AD1839A contains a flexible serial interface that allows
glueless connection to a variety of DSP chips, AES/EBU
receivers, and sample rate converters. The AD1839A can be
configured in left-justified, right-justified, I
2
S, or DSP compati-
ble serial modes. Control of the AD1839A is achieved by means
of an SPI® compatible serial port. While the AD1839A 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
AD1839A is available in a 52-lead MQFP package and is
specified for the −40°C to +85°C industrial temperature range.
APPLICATIONS
DVD video and audio players
Home theater systems
Automotive audio systems
Audio/visual receivers
Digital audio effects process
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
Σ-∆
ADC
Σ-∆
ADC
CONTROL PORT
VOLUME
SERIAL DATA
I/O PORT
VOLUME
VOLUME
VOLUME
DIGITAL
FILTER
DIGITAL
FILTER
VOLUME
VOLUME
CLOCK
DIGITAL
FILTER
DIGITAL
FILTER
DIGITAL
FILTER
Σ-∆
DAC
Σ-∆
DAC
Σ-∆
DAC
OUTL1
OUTR1
OUTL2
OUTR2
OUTL3
OUTR3
FILTD
FILTR
03627-B-001
AD1839A
V
REF
DGND DGND AGND AGND AGND AGND
Figure 1.
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.
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
© 2004 Analog Devices, Inc. All rights reserved.
AD1839A
TABLE OF CONTENTS
Specifications..................................................................................... 3
Test Conditions............................................................................. 3
Timing Specifications....................................................................... 5
Absolute Maximum Ratings............................................................ 7
Temperature Range ...................................................................... 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 11
Functional Overview...................................................................... 12
ADCs............................................................................................ 12
DACs ............................................................................................ 12
DAC and ADC Coding.............................................................. 12
AD1839A Clocking Scheme ..................................................... 12
RESET and Power-Down .......................................................... 13
Power Supply and Voltage Reference....................................... 13
Serial Control Port ..................................................................... 13
Serial Data Ports—Data Format............................................... 14
Packed Modes ............................................................................. 14
Auxiliary Time Division Multiplexing (TDM) Mode ........... 14
Control/Status Registers ............................................................ 19
Cascade Mode............................................................................. 22
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 24
REVISION HISTORY
5/04—Data Sheet Changed from Rev. A to Rev. B
Updated FormatUniversal
Changes to Data Sheet Title1
2/04—Data Sheet Changed from Rev. 0 to Rev. A
Changes to Ordering Guide ............................................................. 6
Deleted Clock Signals Section ....................................................... 11
Added AD1835A Clocking Scheme Section................................ 11
Added Table II and Table III and renumbered following tables 11
Changes to Auxiliary (TDM Mode) Section................................ 13
Changes to Figure 5......................................................................... 14
Changes to Figure 6......................................................................... 14
Added Figures 7a and 8a................................................................. 15
Renamed Figure 7 and Figure 8 to Figure 7b and Figure 8b ..... 15
Changes to Figure 9......................................................................... 15
Changes to Table VIII ..................................................................... 21
Updated Outline Dimensions ........................................................ 24
Rev. B | Page 2 of 24
AD1839A
SPECIFICATIONS
TEST CONDITIONS
Supply Voltages
Ambient Temperature
Input Clock
DAC Input Signal
ADC Input Signal
Input Sample Rate (f
S
)
Measurement Bandwidth
Word Width
Load Capacitance
Load Impedance
5.0 V (AVDD, DVDD)
25°C
12.288 MHz (256 × f
S
mode)
1.0078125 kHz, 0 dBFS
1.0078125 kHz,
−1
dBFS
48 kHz
0 Hz to 20 kHz
24 bits
100 pF
47 kΩ
Performance of all channels is identical (except for the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications).
Table 1.
Parameter
ANALOG-TO-DIGITAL CONVERTERS
ADC Resolution
Dynamic Range (20 Hz to 20 kHz, –60 dB Input)
No Filter
A-Weighted (48 kHz and 96 kHz)
Total Harmonic Distortion + Noise (THD + N)
48 kHz
96 kHz
Interchannel Isolation
Interchannel Gain Mismatch
Analog Inputs
Differential Input Range (±Full Scale)
Common-Mode Input Voltage
Input Impedance
Input Capacitance
V
REF
DC Accuracy
Gain Error
Gain Drift
DIGITAL-TO-ANALOG CONVERTERS
DAC Resolution
Dynamic Range (20 Hz to 20 kHz, –60 dBFS Input)
No Filter
A-Weighted Filter (48 kHz and 96 kHz)
Total Harmonic Distortion + Noise (48 kHz and 96 kHz)
Interchannel Isolation
DC Accuracy
Gain Error
Interchannel Gain Mismatch
Gain Drift
Interchannel Phase Deviation
Volume Control Step Size (1023 Linear Steps)
Volume Control Range (Maximum Attenuation)
Mute Attenuation
De-emphasis Gain Error
Full-Scale Output Voltage at Each Pin (Single-Ended)
Output Resistance at Each Pin
Common-Mode Output Voltage
Min
Typ
24
103
105
–95
–95
100
0.025
–2.828
2.25
4
15
2.25
±5
35
24
103
105
105
108
–92
110
±4
0.025
200
±0.1
0.098
60
–100
±0.1
1.0 (2.8)
180
2.25
–88.5
–87.5
Max
Unit
Bits
dB
dB
dB
dB
dB
dB
V
V
kΩ
pF
V
%
ppm/°C
Bits
dB
dB
dB
dB
%
dB
ppm/°C
Degrees
%
dB
dB
dB
V rms (V p-p)
Ω
V
100
+2.828
–90
Rev. B | Page 3 of 24
AD1839A
Parameter
ADC DECIMATION FILTER, 48 kHz
1
Pass Band
Pass-Band Ripple
Stop Band
Stop-Band Attenuation
Group Delay
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
Stop Band
Stop-Band Attenuation
Group Delay
DAC INTERPOLATION FILTER, 192 kHz
Pass Band
Pass-Band Ripple
Stop Band
Stop-Band Attenuation
Group Delay
DIGITAL I/O
Input Voltage High
Input Voltage Low
Output Voltage High
Output Voltage Low
Leakage Current
POWER SUPPLIES
Supply Voltage (AVDD and DVDD)
Supply Voltage (ODVDD)
Supply Current I
ANALOG
Supply Current I
ANALOG
, Power-Down
Supply Current I
DIGITAL
Supply Current I
DIGITAL
, Power-Down
Dissipation
Operation, Both Supplies
Operation, Analog Supply
Operation, Digital Supply
Power-Down, Both Supplies
Power Supply Rejection Ratio
1 kHz, 300 mV p-p Signal at Analog Supply Pins
20 kHz, 300 mV p-p Signal at Analog Supply Pins
1
1
1
1
Min
Typ
21.77
±0.01
26.23
120
910
43.54
±0.01
52.46
120
460
Max
Unit
kHz
dB
kHz
dB
µs
kHz
dB
kHz
dB
µs
21.77
±0.01
28
55
340
43.54
±0.01
52
55
160
81.2
±0.06
97
80
110
2.4
0.8
ODVDD – 0.4
0.4
±10
4.5
3.0
5.0
84
55
64
1
740
420
320
280
–70
–75
5.5
DVDD
95
67
74
4.5
kHz
dB
kHz
dB
µs
kHz
dB
kHz
dB
µs
kHz
dB
kHz
dB
µs
V
V
V
V
µA
V
V
mA
mA
mA
mA
mW
mW
mW
mW
dB
dB
1
Guaranteed by design.
Rev. B | Page 4 of 24
