CDB4385
Evaluation Board for CS4385
Features
Description
Demonstrates recommended layout and
grounding arrangements
CS8416 receives S/PDIF, & EIAJ-340
compatible digital audio
Headers for external audio input for either PCM
or DSD®
Requires only a digital signal source and power
supplies for a complete digital-to-analog
converter system
The CDB4385 evaluation board is an excellent means
for quickly evaluating the CS4385 24-bit, 48-pin, 8channel D/A converter. Evaluation requires an analog
signal analyzer, a digital signal source, a PC for controlling the CS4385 (only required for control port mode),
and a power supply. Analog line-level outputs are provided via RCA phono jacks.
The CS8416 digital audio receiver IC provides the system timing necessary to operate the digital-to-analog
converter and will accept S/PDIF and EIAJ-340-compatible audio data. The evaluation board may also be
configured to accept external timing and data signals for
operation in a user application during system
development.
ORDERING INFORMATION
CDB4385
Evaluation Board
Hardware or
Software Board
Control
Inputs for PCM
Clocks and Data
CS8416
Digital Audio
Interface
CS4385
Analog Outputs
and Filtering
Inputs for DSD
Clocks and Data
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
MAY '08
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CDB4385
TABLE OF CONTENTS
1. CS4385 DIGITAL-TO-ANALOG CONVERTER ..................................................................................... 4
2. CS8416 DIGITAL AUDIO RECEIVER .................................................................................................... 4
3. INPUT FOR CLOCKS AND DATA ......................................................................................................... 4
4. INPUT FOR CONTROL DATA ............................................................................................................... 4
5. POWER SUPPLY CIRCUITRY ............................................................................................................... 5
6. GROUNDING AND POWER SUPPLY DECOUPLING .......................................................................... 5
7. ANALOG OUTPUT FILTERING ............................................................................................................. 5
8. PERFORMANCE PLOTS ....................................................................................................................... 7
9. SCHEMATICS ..................................................................................................................................... 17
10. ERRATA ............................................................................................................................................. 31
11. REVISION HISTORY ......................................................................................................................... 31
LIST OF FIGURES
Figure 1.FFT (48 kHz, 0 dB) ....................................................................................................................... 7
Figure 2.FFT (48 kHz, -60 dB) .................................................................................................................... 7
Figure 3.FFT (48 kHz, No Input) ................................................................................................................. 7
Figure 4.FFT (48 kHz Out-of-Band, No Input) ............................................................................................. 7
Figure 5.FFT (48 kHz, -60 dB Wideband) ................................................................................................... 8
Figure 6.FFT (IMD 48 kHz) ......................................................................................................................... 8
Figure 7.48 kHz, THD+N vs. Input Freq ...................................................................................................... 8
Figure 8.48 kHz, THD+N vs. Level ............................................................................................................. 8
Figure 9.48 kHz, Fade-to-Noise Linearity ................................................................................................... 8
Figure 10.48 kHz, Frequency Response ..................................................................................................... 8
Figure 11.48 kHz, Crosstalk ........................................................................................................................ 9
Figure 12.48 kHz, Impulse Response ......................................................................................................... 9
Figure 13.48 kHz, Impulse Prefilter ............................................................................................................. 9
Figure 14.Dynamic Range 48 kHz ............................................................................................................ 10
Figure 15.FFT (96 kHz, 0 dB) ................................................................................................................... 10
Figure 16.FFT (96 kHz, -60 dB) ................................................................................................................ 10
Figure 17.FFT (96 kHz, No Input) ............................................................................................................. 11
Figure 18.FFT (96 kHz Out-of-Band, No Input) ......................................................................................... 11
Figure 19.FFT (96 kHz, -60 dB Wideband) ............................................................................................... 11
Figure 20.FFT (IMD 96 kHz) ..................................................................................................................... 11
Figure 21.96 kHz, THD+N vs. Input Freq .................................................................................................. 11
Figure 22.96 kHz, THD+N vs. Level ......................................................................................................... 11
Figure 23.96 kHz, Fade-to-Noise Linearity ............................................................................................... 12
Figure 24.96 kHz, Frequency Response ................................................................................................... 12
Figure 25.96 kHz, Crosstalk ...................................................................................................................... 12
Figure 26.96 kHz, Impulse Response ....................................................................................................... 12
Figure 27.96 kHz, Impulse Prefilter ........................................................................................................... 12
Figure 28.Dynamic Range 96 kHz ............................................................................................................ 13
Figure 29.FFT (192 kHz, 0 dB) ................................................................................................................. 13
Figure 30.FFT (192 kHz, -60 dB) .............................................................................................................. 13
Figure 31.FFT (192 kHz, No Input) ........................................................................................................... 14
Figure 32.FFT (192 kHz Out-of-Band, No Input) ....................................................................................... 14
Figure 33.FFT (192 kHz, -60 dB Wideband) ............................................................................................. 14
Figure 34.FFT (IMD 192 kHz) ................................................................................................................... 14
Figure 35.192 kHz, THD+N vs. Input Freq ................................................................................................ 14
Figure 36.192 kHz, THD+N vs. Level ....................................................................................................... 14
Figure 37.192 kHz, Fade-to-Noise Linearity ............................................................................................. 15
Figure 38.192 kHz, Frequency Response ................................................................................................. 15
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CDB4385
Figure 39.192 kHz, Crosstalk .................................................................................................................... 15
Figure 40.192 kHz, Impulse Response ..................................................................................................... 15
Figure 41.192 kHz, Impulse Prefilter ......................................................................................................... 15
Figure 42.Dynamic Range 192 kHz .......................................................................................................... 16
Figure 43.System Block Diagram and Signal Flow ................................................................................... 17
Figure 44.CS4385 ..................................................................................................................................... 18
Figure 45.Analog Outputs A1 - B1 ............................................................................................................ 19
Figure 46.Analog Outputs A2 - B2 ............................................................................................................ 20
Figure 47.Analog Outputs A3 - B3 ............................................................................................................ 21
Figure 48.Analog Outputs A4 - B4 ............................................................................................................ 22
Figure 49.CS8416 S/PDIF Input ............................................................................................................... 23
Figure 50.PCM Input Header and Muxing ................................................................................................. 24
Figure 51.DSD Input Header ..................................................................................................................... 25
Figure 52.Control Input ............................................................................................................................. 26
Figure 53.Power Inputs ............................................................................................................................. 27
Figure 54.Silkscreen Top .......................................................................................................................... 28
Figure 55.Top Side .................................................................................................................................... 29
Figure 56.Bottom Side .............................................................................................................................. 30
LIST OF TABLES
Table 1. System Connections .................................................................................................................... 5
Table 2. CDB4385 Jumper Settings ............................................................................................................ 6
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CDB4385
CDB4385 SYSTEM OVERVIEW
The CDB4385 evaluation board is an excellent means of quickly evaluating the CS4385. The CS8416 digital audio
interface receiver provides an easy interface to digital audio signal sources including the majority of digital audio test
equipment. The evaluation board also allows the user to supply external PCM or DSD clocks and data through PCB
headers for system development.
The CDB4385 schematic has been partitioned into 10 schematics shown in Figures 44 through 53. Each partitioned
schematic is represented in the system diagram shown in Figure 43. Notice that the system diagram also includes
the interconnections between the partitioned schematics.
1. CS4385 DIGITAL-TO-ANALOG CONVERTER
A description of the CS4385 is included in the CS4385 datasheet.
2. CS8416 DIGITAL AUDIO RECEIVER
The system receives and decodes the standard S/PDIF data format using a CS8416 digital audio receiver
(Figure 49). The outputs of the CS8416 include a serial bit clock, serial data, left-right clock, and a 128/256 Fs mas2
ter clock. The CS8416 data format is fixed to I S. The operation of the CS8416 and a discussion of the digital audio
interface are included in the CS8416 datasheet.
The evaluation board has been designed such that the input can be either optical or coaxial, see Figure 49. However, both inputs cannot be driven simultaneously.
Switch position 7 of S1 sets the output MCLK-to-LRCK ratio of the CS8416. This switch should be set to 256 (closed)
for inputs Fs≤96 kHz and 128 (open) for Fs≥64 kHz. The 8416 must be manually reset using ‘HW RST’ (S2) or
through the software when this switch is changed.
3. INPUT FOR CLOCKS AND DATA
The evaluation board has been designed to allow interfacing to external systems via headers J11 and J7. Header
J11 allows the evaluation board to accept externally generated PCM clocks and data. The schematic for the
clock/data input is shown in Figure 50. Switch position 6 of S1 selects the source as either CS8416 (open) or header
J11 (closed).
Header J7 allows the evaluation board to accept externally generated DSD data and clocks. The schematic for the
clock/data input is shown in Figure 50. A synchronous MCLK must still be provided via Header J11. Switch position
8 of S1 selects either PCM (open) or DSD (closed).
Please see the CS4385 datasheet for more information.
4. INPUT FOR CONTROL DATA
The evaluation board can be run in either a stand-alone mode or with a PC. Stand-alone mode uses the CS4385 in
hardware mode and the mode pins are configured using switch positions 1 through 5 of S1. PC mode uses software
to setup the CS4385 through I²C® using the PC’s serial or USB ports. PC mode is automatically selected when the
serial or USB port is attached and the CDB4385 software is running.
Header J15 offers the option for external input of RST and SPI™/I²C clocks and data. The board is setup from the
factory to use the on-board microcontroller in conjunction with the supplied software. To use an external control
source, remove the shunts on J15 and place a ribbon cable so the signal lines are on the center row and the grounds
2
are on the right side. R116 and R119 should be populated with 2-kΩ resistors when using an external I C source
which does not already provide pull-ups.
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CDB4385
5. POWER SUPPLY CIRCUITRY
Power is supplied to the evaluation board by four binding posts (GND, +5V, +12V, and -12V), see Figure 53. The
‘+5V’ terminal supplies VA and the rest of the +5-V circuitry on the board. The +3.3-V circuitry is powered from a
regulator. The +2.5 volts required for VD is also provided from an on-board regulator. The +5-V supply should be
set within the recommended values for VA stated in the CS4385 datasheet.
WARNING: Refer to the CS4385 datasheet for maximum allowable voltage levels. Operation outside of this range
can cause permanent damage to the device.
6. GROUNDING AND POWER SUPPLY DECOUPLING
As with any high-performance converter, the CS4385 requires careful attention to power supply and grounding arrangements to optimize performance. Figure 44 details the connections to the CS4385 and Figures 54, 55, and 56
show the component placement and top and bottom layout. The decoupling capacitors are located as close to the
CS4385 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions in radiated
noise.
7. ANALOG OUTPUT FILTERING
The analog output on the CDB4385 has been designed according to the CS4385 datasheet. This output circuit includes an active 2-pole, 50-kHz filter which utilizes the multiple-feedback topology.
CONNECTOR
INPUT/OUTPUT
SIGNAL PRESENT
+5V
Input
+ 5 V power
GND
Input
Ground connection from power supply
+12V
Input
+12 V positive supply for the on-board filtering
-12V
Input
-12 V negative supply for the on-board filtering
S/PDIF IN - J9
Input
Digital audio interface input via coax
S/PDIF IN - OPT1
Input
Digital audio interface input via optical
PCM INPUT - J11
Input
Input for master, serial, left/right clocks and serial data
DSD INPUT - J7
Input
Input for DSD serial clock and DSD data
OUTA1-B4
Output
RCA line level analog outputs
Table 1. System Connections
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5
CDB4385
JUMPER /
SWITCH
PURPOSE
POSITION
FUNCTION SELECTED
Selects source of control data
*shunts on Left
shunts removed
*Control from PC and on-board microcontroller
External control input using center and right columns
J16
JTAG micro programming
-
S2
Resets CS8416 and CS4385
J15
S1
Reserved for factory use only
The CS8416 must be reset if switch S1 is changed
CS4385 mode settings M0-M4
1-5
Default: M0, M4 open (HI)
M1, M2, M3 closed (LO)
Sets clock source
6
Sets clock source for CS4385
*open = RX(CS8416), closed = EXT(J11)
Sets MCLK ratio of CS8416
7
Selects 128x (open) or 256x (*closed) MCLK/LRCK ratio
output for CS8416
Selects PCM or DSD mode
8
For PCM input set to *Open, for DSD set to Closed
*Default Factory Settings
Table 2. CDB4385 Jumper Settings
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CDB4385
8. PERFORMANCE PLOTS
The plots in the following section were acheived using an Audio Precision System 2700 and a randomly chosen production CDB4385. In some cases the performance may be limited by the CDB4385. All measurements were taken
at room temp using the standard AP filter options (20 Hz to 22 kHz) with default board settings and nominal
datasheet voltages applied unless otherwise noted.
The impulse response plots were taken both pre-and post filtering as the off-chip filter was degrading the performance at higher sample rates. The pre-filter impulse response plots were taken directly at the output pins of the
DAC (with the analog filter still connected) to show the effect of the CDB’s analog filtering on the impulse response
(as the analog filtering adds its own signature to the impulse response of the DAC, and in the case of the higher
sampling rates it was band-limiting it).
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
-60
d
B
r
d
B
r
-70
-70
-80
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
20
50
100
200
500
1k
2k
5k
10k
20k
-150
20
50
100
200
Figure 1. FFT (48 kHz, 0 dB)
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
2k
5k
10k
20k
-60
d
B
r
-70
-80
A
1k
Figure 2. FFT (48 kHz, -60 dB)
-60
d
B
r
500
Hz
Hz
-70
-80
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
20
50
100
200
500
1k
2k
5k
Hz
Figure 3. FFT (48 kHz, No Input)
DS671DB4
10k
20k
-150
20k
40k
60k
80k
100k
120k
Hz
Figure 4. FFT (48 kHz Out-of-Band, No Input)
7
CDB4385
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
d
B
r
-60
d
B
r
-70
-80
-70
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
20
50
100
200
500
1k
2k
5k
10k
-150
20k
2k
4k
6k
8k
10k
Hz
Figure 5. FFT (48 kHz, -60 dB Wideband)
d
B
r
A
12k
14k
16k
18k
20k
Hz
Figure 6. FFT (IMD 48 kHz)
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
d
B
r
-60
A
-70
-50
-60
-70
-80
-80
-90
-90
-100
-100
-110
-110
-120
20
50
100
200
500
1k
2k
5k
10k
-120
-120
20k
-100
-80
-60
-40
-20
+0
dBFS
Hz
Figure 7. 48 kHz, THD+N vs. Input Freq
Figure 8. 48 kHz, THD+N vs. Level
+5
+40
+35
+4
+30
+25
+3
+20
+2
+15
+10
+1
d
B
r
+5
+0
d
B
r
A
-5
A
+0
-1
-10
-15
-2
-20
-3
-25
-30
-4
-35
-40
-140
-120
-100
-80
-60
-40
-20
dBFS
Figure 9. 48 kHz, Fade-to-Noise Linearity
8
+0
-5
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Figure 10. 48 kHz, Frequency Response
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CDB4385
+0
3
-10
2.5
-20
2
-30
-40
1.5
-50
1
-60
500m
-70
d
B
V
-80
-90
0
-500m
-100
-1
-110
-1.5
-120
-2
-130
-140
-2.5
-150
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
-3
0
500u
1m
1.5m
2m
2.5m
3m
sec
Figure 11. 48 kHz, Crosstalk
Figure 12. 48 kHz, Impulse Response
3
2.5
2
1.5
1
500m
V
0
-500m
-1
-1.5
-2
-2.5
-3
0
500u
1m
1.5m
2m
2.5m
3m
sec
Figure 13. 48 kHz, Impulse Prefilter
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9
CDB4385
Figure 14. Dynamic Range 48 kHz
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
d
B
r
-60
d
B
r
-70
-80
A
-80
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
20
50
100
200
500
1k
2k
Hz
Figure 15. FFT (96 kHz, 0 dB)
10
-70
5k
10k
20k
-150
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Figure 16. FFT (96 kHz, -60 dB)
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CDB4385
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
d
B
r
-60
d
B
r
-70
-70
-80
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
-150
20
50
100
200
500
1k
2k
5k
10k
20k
20k
40k
60k
Figure 17. FFT (96 kHz, No Input)
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-60
d
B
r
-70
-80
-70
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
50
100
200
500
1k
2k
5k
10k
20k
-150
40k
2k
4k
6k
Hz
A
8k
10k
12k
14k
16k
18k
20k
Hz
Figure 19. FFT (96 kHz, -60 dB Wideband)
d
B
r
120k
-50
-60
-150
20
100k
Figure 18. FFT (96 kHz Out-of-Band, No Input)
-50
d
B
r
80k
Hz
Hz
Figure 20. FFT (IMD 96 kHz)
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-60
d
B
r
-70
A
-80
-50
-60
-70
-80
-90
-90
-100
-100
-110
-110
-120
20
50
100
200
500
1k
2k
5k
Hz
Figure 21. 96 kHz, THD+N vs. Input Freq
DS671DB4
10k
20k
-120
-120
-100
-80
-60
-40
-20
+0
dBFS
Figure 22. 96 kHz, THD+N vs. Level
11
CDB4385
+5
+40
+35
+4
+30
+25
+3
+20
+2
+15
+10
+1
d
B
r
+5
+0
d
B
r
A
-5
A
+0
-1
-10
-15
-2
-20
-3
-25
-30
-4
-35
-40
-140
-120
-100
-80
-60
-40
-20
-5
20
+0
50
100
200
500
1k
2k
5k
10k
20k
Hz
dBFS
Figure 23. 96 kHz, Fade-to-Noise Linearity
Figure 24. 96 kHz, Frequency Response
+0
3
-10
2.5
-20
2
-30
1.5
-40
-50
1
-60
d
B
500m
-70
V
0
-80
-500m
-90
-100
-1
-110
-1.5
-120
-2
-130
-2.5
-140
-150
20
50
100
200
500
1k
2k
5k
10k
20k
-3
0
250u
500u
750u
1m
1.25m
1.5m
sec
Hz
Figure 25. 96 kHz, Crosstalk
Figure 26. 96 kHz, Impulse Response
3
2.5
2
1.5
1
500m
V
0
-500m
-1
-1.5
-2
-2.5
-3
0
250u
500u
750u
1m
1.25m
1.5m
sec
Figure 27. 96 kHz, Impulse Prefilter
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CDB4385
Figure 28. Dynamic Range 96 kHz
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
d
B
r
-60
d
B
r
-70
-80
A
-70
-80
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
20
50
100
200
500
1k
2k
Hz
Figure 29. FFT (192 kHz, 0 dB)
DS671DB4
5k
10k
20k
-150
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Figure 30. FFT (192 kHz, -60 dB)
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CDB4385
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
-60
d
B
r
d
B
r
-70
-70
-80
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
-150
-150
20
50
100
200
500
1k
2k
5k
10k
20k
20k
40k
60k
Figure 31. FFT (192 kHz, No Input)
+0
+0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-80
-70
-80
A
A
-90
-90
-100
-100
-110
-110
-120
-120
-130
-130
-140
-140
50
100
200
500
1k
2k
5k
10k
20k
50k
-150
90k
2k
4k
6k
Hz
A
+0
+0
-10
-20
-20
-30
-30
-40
-40
-50
-60
d
B
r
-70
A
-80
12k
14k
16k
18k
20k
-50
-60
-70
-80
-90
-90
-100
-100
-110
-110
50
100
200
500
1k
2k
5k
10k
Hz
Figure 35. 192 kHz, THD+N vs. Input Freq
14
10k
Figure 34. FFT (IMD 192 kHz)
-10
-120
20
8k
Hz
Figure 33. FFT (192 kHz, -60 dB Wideband)
d
B
r
120k
-60
d
B
r
-70
-150
20
100k
Figure 32. FFT (192 kHz Out-of-Band, No Input)
-60
d
B
r
80k
Hz
Hz
20k
-120
-120
-100
-80
-60
-40
-20
+0
dBFS
Figure 36. 192 kHz, THD+N vs. Level
DS671DB4
CDB4385
+5
+40
+35
+4
+30
+25
+3
+20
+2
+15
+10
+1
d
B
r
+5
+0
d
B
r
A
-5
A
-10
-15
+0
-1
-2
-20
-3
-25
-30
-4
-35
-40
-140
-120
-100
-80
-60
-40
-20
-5
20
+0
50
100
dBFS
200
500
1k
2k
5k
10k
20k
Hz
Figure 37. 192 kHz, Fade-to-Noise Linearity
Figure 38. 192 kHz, Frequency Response
+0
3
-10
2.5
-20
2
-30
1.5
-40
-50
1
-60
d
B
500m
-70
V
0
-80
-500m
-90
-100
-1
-110
-1.5
-120
-2
-130
-2.5
-140
-150
20
50
100
200
500
1k
2k
5k
10k
20k
-3
0
200u
400u
600u
sec
Hz
Figure 39. 192 kHz, Crosstalk
Figure 40. 192 kHz, Impulse Response
3
2.5
2
1.5
1
500m
V
0
-500m
-1
-1.5
-2
-2.5
-3
0
200u
400u
600u
sec
Figure 41. 192 kHz, Impulse Prefilter
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CDB4385
Figure 42. Dynamic Range 192 kHz
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9. SCHEMATICS
Power
Serial Control Port
I2C/SPI Header
Differential to Single-Ended
Analog Outputs
PCM HEADER
2
A1, B1
2
A2, B2
2
A3, B3
2
A4, B4
PCM Clocks/Data
PCM mux
PCM Clocks/Data
PCM Clocks/Data
CS4385
Hardware Control
Switches
DSD Clocks/
Data
DSD clk_enable
DSD input enable
M0 - M4 switches
(for stand-alone mode)
PCM source select
CS8416 clock setting
CS8416
S/PDIF
Input
DSD HEADER
CDB4385
17
Figure 43. System Block Diagram and Signal Flow
18
CDB4385
DS671DB4
Figure 44. CS4385
CDB4385
Figure 45. Analog Outputs A1 - B1
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19
20
CDB4385
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Figure 46. Analog Outputs A2 - B2
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CDB4385
21
Figure 47. Analog Outputs A3 - B3
22
CDB4385
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Figure 48. Analog Outputs A4 - B4
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CDB4385
23
Figure 49. CS8416 S/PDIF Input
24
CDB4385
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Figure 50. PCM Input Header and Muxing
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CDB4385
25
Figure 51. DSD Input Header
26
CDB4385
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Figure 52. Control Input
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27
CDB4385
Figure 53. Power Inputs
28
CDB4385
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Figure 54. Silkscreen Top
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CDB4385
29
Figure 55. Top Side
30
CDB4385
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Figure 56. Bottom Side
CDB4385
10.ERRATA
For the CDB4385 revision B, the silkscreen for S1 denotes default switch settings. This refers only to M0 - M4. See
Table 2 on page 6 for default settings for the other switch positions.
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CDB4385
11.REVISION HISTORY
Release
DB1
DB2
DB3
DB4
Changes
Initial Release
Updated for revision C of CDB
Added Performance Plots
Added USB support to Section 4. Input for Control Data
Contacting Cirrus Logic Support
For all product questions and inquiries, contact a Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com.
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE
IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND
CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR
CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO
FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks
or service marks of their respective owners.
DSD is a registered trademark of Sony Kabushiki Kaisha TA Sony Company.
I²C is a registered trademark of Philips Semiconductor.
SPI is a trademark of Motorola, Inc.
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DS671DB4