Data Sheet
FEATURES
16-Channel High Performance
Differential Output, 192 kHz, 24-Bit DAC
ADAU1966
GENERAL DESCRIPTION
The
ADAU1966
is a high performance, single-chip DAC that
provides 16 digital-to-analog converters (DACs) with differen-
tial output using the Analog Devices, Inc., patented multibit
sigma-delta (Σ-Δ) architecture. An SPI/I
2
C port is included,
allowing a microcontroller to adjust volume and many other
parameters. The
ADAU1966
operates from 2.5 V digital, 5 V
analog and 3.3 V or 5 V input/output supplies. A linear regulator
is included to generate the digital supply voltage from the analog
supply voltage. The
ADAU1966
is available in an 80-lead LQFP
package.
The
ADAU1966
is designed for low EMI. This consideration is
apparent in both the system and circuit design architectures.
By using the on-board PLL to derive the internal master clock
from an external LRCLK, the
ADAU1966
can eliminate the
need for a separate high frequency master clock and can be
used with or without a bit clock. The DACs are designed using
the latest Analog Devices continuous time architectures to
further minimize EMI. By using 2.5 V digital supplies, power
consumption is minimized, and the digital waveforms are a
smaller amplitude, further reducing emissions.
118 dB DAC dynamic range and SNR
−98 dB THD + N
Differential voltage DAC output
2.5 V digital, 5 V analog and 3.3 V or 5 V I/O supplies
521 mW total (32.6 mW/channel) quiescent power
PLL generated or direct MCLK master clock
Low EMI design
Linear regulator driver to generate digital supply
Supports 24-bit and 32 kHz to 192 kHz sample rates
Low propagation 192 kHz sample rate mode
Log volume control with autoramp function
Temperature sensor with digital readout ±3°C accuracy
SPI and I
2
C controllable for flexibility
Software-controllable clickless mute
Software power-down
Right-justified, left-justified, I
2
S, and TDM modes
Master and slave modes with up to 16-channel input/output
80-lead LQFP package
Qualified for automotive applications
APPLICATIONS
Automotive audio systems
Home theater systems
Digital audio effects processors
FUNCTIONAL BLOCK DIAGRAM
DIGITAL AUDIO
INPUT
ADAU1966
DAC
DAC
DAC
DIFFERENTIAL
ANALOG
AUDIO
OUTPUTS
DAC
DAC
DAC
DAC
DAC
PRECISION
VOLTAGE
REFERENCE
CONTROL PORT
SPI/I
2
C
DIGITAL
FILTER
AND
VOLUME
CONTROL
SDATA
IN
SDATA
IN
CLOCKS
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
DIGITAL
FILTER
AND
VOLUME
CONTROL
SERIAL DATA PORT
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
INTERNAL
TEMP
SENSOR
09434-001
DIFFERENTIAL
ANALOG
AUDIO
OUTPUTS
CONTROL DATA
INPUT/OUTPUT
Figure 1.
Rev. E
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ADAU1966* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
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DESIGN RESOURCES
•
ADAU1966 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
EVALUATION KITS
•
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•
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DISCUSSIONS
DOCUMENTATION
Data Sheet
•
ADAU1966: 16-Channel High Performance Differential
Output, 192 kHz, 24-Bit DAC Data Sheet
User Guides
•
UG-416: Evaluating the ADAU1966 High Performance,
Low Power, Multibit Sigma-Delta DAC
View all ADAU1966 EngineerZone Discussions.
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TOOLS AND SIMULATIONS
•
ADAU1966 IBIS Model
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ADAU1966
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Analog Performance Specifications ........................................... 4
Crystal Oscillator Specifications................................................. 5
Digital Input/Output Specifications........................................... 5
Power Supply Specifications........................................................ 6
Digital Filters ................................................................................. 6
Timing Specifications .................................................................. 7
Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution .................................................................................. 9
Pin Configuration and Function Descriptions ........................... 10
Typical Performance Characteristics ........................................... 13
Application Circuits ....................................................................... 14
Theory of Operation ...................................................................... 15
Digital-to-Analog Converters (DACs) .................................... 15
Clock Signals ............................................................................... 15
Power-Up and RST ..................................................................... 16
Standalone Mode ........................................................................ 17
I
2
C Control Port .......................................................................... 17
Serial Control Port: SPI Control Mode ................................... 19
Power Supply and Voltage Reference ....................................... 20
Serial Data Ports—Data Format ............................................... 20
Time-Division Multiplexed (TDM) Modes ............................ 20
Temperature Sensor ................................................................... 20
Additional Modes ....................................................................... 22
Register Summary .......................................................................... 24
Register Details ............................................................................... 25
PLL and Clock Control 0 Register ........................................... 25
PLL and Clock Control 1 Register ........................................... 26
Data Sheet
Block Power-Down and Thermal Sensor Control 1 Register27
Power-Down Control 2 Register .............................................. 28
Power-Down Control 3 Register .............................................. 29
Thermal Sensor Temperature Readout Register .................... 30
DAC Control 0 Register ............................................................ 31
DAC Control 1 Register ............................................................ 32
DAC Control 2 Register ............................................................ 33
DAC Individual Channel Mutes 1 Register ............................ 34
DAC Individual Channel Mutes 2 Register ............................ 35
Master Volume Control Register.............................................. 36
DAC 1 Volume Control Register .............................................. 36
DAC 2 Volume Control Register .............................................. 37
DAC 3 Volume Control Register .............................................. 37
DAC 4 Volume Control Register .............................................. 38
DAC 5 Volume Control Register .............................................. 38
DAC 6 Volume Control Register .............................................. 39
DAC 7 Volume Control Register .............................................. 39
DAC 8 Volume Control Register .............................................. 40
DAC 9 Volume Control Register .............................................. 40
DAC 10 Volume Control Register............................................ 41
DAC 11 Volume Control Register............................................ 41
DAC 12 Volume Control Register............................................ 42
DAC 13 Volume Control Register............................................ 42
DAC 14 Volume Control Register............................................ 43
DAC 15 Volume Control Register............................................ 43
DAC 16 Volume Control Register............................................ 44
Common Mode and Pad Strength Register ............................ 44
DAC Power Adjust 1 Register ................................................... 45
DAC Power Adjust 2 Register ................................................... 46
DAC Power Adjust 3 Register ................................................... 47
DAC Power Adjust 4 Register ................................................... 48
Outline Dimensions ....................................................................... 52
Ordering Guide .......................................................................... 52
Automotive Products ................................................................. 52
Rev. E | Page 2 of 52
Data Sheet
REVISION HISTORY
3/16—Rev. D to Rev. E
Changes to Table 4 ............................................................................ 5
12/13—Rev. C to Rev. D
Changes to Features Section ............................................................ 1
Changes to General Description ..................................................... 1
Changes to Specifications Section................................................... 4
Deleted Table 3 and Table 4; Renumbered Sequentially .............. 5
Changes to Table 5 ............................................................................ 6
Changes to Theory of Operation Section ....................................15
Changes to Table 11 ........................................................................15
Changes to Table 13 ........................................................................17
Changes to Serial Control Port: SPI Control Mode Section......19
Added Figure 14, Figure 15, and Figure 16; Renumbered
Sequentially ......................................................................................19
Moved, Changes to Figure 17 ........................................................20
Changes to Power Supply and Voltage Reference Section and
Serial Data Ports—Data Format Section ......................................20
Changes to Figure 18 ......................................................................21
Change to Address 0x01C, Table 23 .............................................24
Changes to Table 52, Common Mode and Pad Strength
Register .............................................................................................44
ADAU1966
3/13—Rev. B to Rev. C
Changes to Table 2 and Table 3 ....................................................... 5
Changes to Table 4 ............................................................................ 6
Changes to I
2
C Control Port Section ............................................ 18
Changes to Figure 13, Table 19, Table 20, Table 21, and
Table 22 ............................................................................................. 19
Changes to Serial Control Port: SPI Control Mode Section ..... 20
8/12—Rev. A to Rev. B
Change to Table 10 .......................................................................... 10
7/12—Rev. 0 to Rev. A
Changed Output Resistance at Each Pin Parameter from 100 Ω
to 33 Ω ................................................................................................ 4
Changes to Figure 13 ...................................................................... 19
Added Figure 14 .............................................................................. 20
Updated Outline Dimensions........................................................ 52
9/11—Revision 0: Initial Version
Rev. E | Page 3 of 52
ADAU1966
SPECIFICATIONS
Data Sheet
Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase deviation specifications.
Master clock = 12.288 MHz (48 kHz f
S
, 256 × f
S
mode), input sample rate = 48 kHz, measurement bandwidth = 20 Hz to 20 kHz, word
width = 24 bits, load capacitance (digital output) = 20 pF, load current (digital output) = ±1 mA or 1.5 kΩ to ½ DVDD supply, input
voltage high = 2.0 V, input voltage low = 0.8 V, analog audio output resistive load = 3100 Ω per pin, unless otherwise noted.
ANALOG PERFORMANCE SPECIFICATIONS
Specifications guaranteed at AVDDx = 5 V and an ambient temperature of 25°C. Supply voltages = AVDDx = 5 V, DVDD = 2.5 V,
ambient temperature
1
(T
A
) = 25°C, unless otherwise noted.
Table 1.
Parameter
DIGITAL-TO-ANALOG CONVERTERS
Dynamic Range
No Filter (RMS)
With A-Weighted Filter (RMS)
Total Harmonic Distortion + Noise
Test Conditions/Comments
20 Hz to 20 kHz, −60 dB input
105
108
0 dBFS
Two channels running, −1 dBFS
16 channels running, −1 dBFS
−10
−25
−30
115.5
118
−90
−98
−98
3.00 (±8.49)
−6
100
0
0.375
95.25
±0.6
33
TS_REF pin
CM pin
CM pin
1.50
2.25
2.25
dB
dB
dB
dB
dB
V rms (V p-p)
%
mV
ppm/°C
dB
Degrees
dB
dB
dB
Ω
V
V
V
°C
°C
°C
Hz
V
V
Min
Typ
Max
Unit
−85
+10
+25
+30
Full-Scale Differential Output Voltage
Gain Error
Offset Error
Gain Drift
Interchannel Isolation
Interchannel Phase Deviation
Volume Control Step
Volume Control Range
De-emphasis Gain Error
Output Resistance at Each Pin
REFERENCE VOLTAGES
Temperature Sensor Reference Voltage
Common-Mode Reference Output
External Reference Voltage Source
TEMPERATURE SENSOR
Temperature Accuracy
Temperature Readout Range
Temperature Readout Step Size
Temperature Sample Rate
REGULATOR
Input Supply Voltage
Regulated Output Voltage
1
2.14
2.29
−3
−60
1
0.25
VSUPPLY pin
VSENSE pin
3.0
2.26
5
2.50
+3
+140
6
5.5
2.59
Functionally guaranteed at −40°C to +125°C case temperature.
Rev. E | Page 4 of 52
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