Cirrus Logic CS4397 User Manual
CS4397
24-Bit, Multi-Standard D/A Converter for Digital Audio
Features
24 Bit Conversion
Up to 192 kHz Sample Rates
120 dB Dynamic Range
-100 dB THD+N
Supports PCM, DSD and External
Interpolation filters
Advanced Dynamic-Element Matching
Low Clock Jitter Sensitivity
Digital De-emphasis for 32 kHz, 44.1 kHz and
48 kHz
External Reference Input
I
SCLK
LRCK
SDATA
SERIAL INTERFACE
AND FORMAT SELECT
Description
The CS4397 is a complete high performance 24-bit
48/96/192 kHz stereo digital-to-analog conversion system. The device includes a digital interpolation filter
followed by a oversampled multi-bit delta-sigma modulator which drives dynamic-element-matching (DEM)
selection logic. The output from the DEM block controls
the input to a multi-element switched capacitor DAC/lowpass filter, with fully-differential outputs. This multi-bit architecture features significantly lower out-of-band noise
and jitter sensitivity than traditional 1-bit designs, and the
advanced DEM guarantees low noise and distortion at
all signal levels.
ORDERING INFORMATION
CS4397-KS -10° to 70° C 28-pin Plastic SOIC
CS4397-KSZ -10° to 70° C 28-pin Plastic SOIC Lead free
CDB4397 Evaluation Board
SOFT MUTE
DE-EMPHASIS
FILTER
MCLK
DIVIDER
M4
(AD0/CS)
CLOCK
http://www.cirrus.com
INTERPOLATION
INTERPOLATION
HARDWARE MODE CONTROL
M3 M2
(AD1/CDIN) (SCL/CCLK)
FILTER
FILTER
(CONTROL PORT)
M1
(SDA/CDOUT)
MULTI-BIT
∆Σ
MODULATOR
MULTI-BIT
∆Σ
MODULATOR
M0
Copyright © Cirrus Logic, Inc. 2004
RESET MUTEC MUTE
(All Rights Reserved)
DYNAMIC
ELEMENT
MATCHING
DYNAMIC
ELEMENT
MATCHING
LOGIC
LOGIC
CAPACITOR-DAC
CAPACITOR-DAC
VOLTAGE REFERENCE
VREF CMOUTFILT-
FILT+
SWITCHED
AND FILTER
SWITCHED
AND FILTER
AOUTL+
AOUTL-
AOUTR+
AOUTR-
SEP ‘04
DS333F1
1
TABLE OF CONTENTS
1.0 CHARACTERISTICS/SPECIFICATIONS ..................................................................... 4
ANALOG CHARACTERISTICS................................................................................... 4
Dynamic Performance - Single Speed Mode - Fs equal to 48 kHz ...................... 4
Dynamic Performance - Double Speed Mode - Fs equal to 96 kHz .................... 4
Dynamic Performance - Quad-Speed Mode - Fs equal to 192 kHz ..................... 4
ANALOG CHARACTERISTICS................................................................................... 5
Power Supplies .................................................................................................... 5
Analog Output ...................................................................................................... 5
Combined Digital and On-chip Analog Filter Response - Single Speed Mode .... 6
Combined Digital and On-chip Analog Filter Response - Double Speed Mode ... 6
Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode ..... 6
ANALOG CHARACTERISTICS - DSD MODE ............................................................ 7
Dynamic Performance - DSD Mode ..................................................................... 7
Analog Output - DSD Mode ................................................................................. 7
Combined Digital and On-chip Analog Filter Response - DSD Mode .................. 7
ANALOG CHARACTERISTICS - 8X INTERPOLATOR MODE .................................. 8
Dynamic Performance Mode ................................................................................ 8
Analog Output ...................................................................................................... 8
Combined Digital and On-chip Analog Filter Response - 8x Interpolator Mode ... 8
DIGITAL CHARACTERISTICS.................................................................................... 9
ABSOLUTE MAXIMUM RATINGS.............................................................................. 9
RECOMMENDED OPERATING CONDITIONS.......................................................... 9
SWITCHING CHARACTERISTICS ........................................................................... 10
DSD - SWITCHING CHARACTERISTICS ................................................................ 11
8X INTERPOLATOR - SWITCHING CHARACTERISTICS....................................... 12
SWITCHING CHARACTERISTICS - CONTROL PORT ........................................... 13
2
I
C® Mode ......................................................................................................... 13
SPI Mode ........................................................................................................... 14
2.0 TYPICAL CONNECTION DIAGRAM .......................................................................... 15
3.0 REGISTER DESCRIPTION ........................................................................................ 16
3.1 Differential DC offset calibration ........................................................................ 16
3.2 Soft Mute ........................................................................................................... 16
3.3 Mode Select ....................................................................................................... 17
3.4 Power DowN ...................................................................................................... 17
4.0 PIN DESCRIPTION - PCM MODE .............................................................................. 18
5.0 PIN DESCRIPTION - DSD MODE .............................................................................. 23
6.0 PIN DESCRIPTION - 8X INTERPOLATOR MODE .................................................... 24
7.0 APPLICATIONS .......................................................................................................... 25
7.1 Recommended Power-up Sequence ................................................................. 25
8.0 CONTROL PORT INTERFACE .................................................................................. 26
8.1 SPI Mode ........................................................................................................... 26
2
8.2 I
C Mode ........................................................................................................... 26
8.2 Memory Address Pointer (MAP) ....................................................................... 26
9.0 PARAMETER DEFINITIONS ...................................................................................... 33
10.0 REFERENCES .......................................................................................................... 33
11.0 PACKAGE DIMENSIONS ......................................................................................... 34
CS4397
2 DS333F1
TABLE OF FIGURES
Figure 1. Serial Audio Input Timing ......................................................................... 10
Figure 2. Direct Stream Digital - Serial Audio Input Timing ..................................... 11
Figure 3. Serial Audio Input Timing ......................................................................... 12
Figure 4. I2C Control Port Timing ............................................................................ 13
Figure 5. SPI Control Port Timing ........................................................................... 14
Figure 6. Typical Connection Diagram - Hardware Mode (Control Port Mode) ....... 15
Figure 7. Control Port Timing, I
Figure 8. Control Port Timing, SPI mode ................................................................ 27
Figure 9. Single-speed Transition Band .................................................................. 29
Figure 10.Single-speed Stopband Rejection ............................................................ 29
Figure 11.Single-speed Transition Band .................................................................. 29
Figure 12.Single-speed Frequency Response ......................................................... 29
Figure 13.Double-speed Stopband .......................................................................... 29
Figure 14.Double-speed Transition Band ................................................................. 29
Figure 15.Double-speed Transition Band ................................................................. 29
Figure 16.Double-speed Frequency Response ........................................................ 29
Figure 17.Quad-speed Stopband Rejection ............................................................. 30
Figure 18.Quad-speed Transition Band ................................................................... 30
Figure 19.Quad-speed Transition Band ................................................................... 30
Figure 20.Quad-speed Frequency Response .......................................................... 30
Figure 21.8x Interpolator Stop Band ........................................................................ 30
Figure 22.8x Interpolator Transition Band ................................................................ 30
Figure 23.8x Interpolator Transition Band ................................................................ 30
Figure 24.8x Interpolator Frequency Response ....................................................... 30
Figure 25.DSD Frequency Response ...................................................................... 31
Figure 26.DSD Transition Band ............................................................................... 31
Figure 27.DSD Transition Band ............................................................................... 31
Figure 28.De-Emphasis Curve ................................................................................. 31
Figure 29.Format 0, Left Justified ............................................................................. 32
Figure 30.Format 1, I
Figure 31.Format 2, Right Justified, 16-Bit Data ...................................................... 32
Figure 32.Format 3, Right Justified, 24-Bit Data ...................................................... 32
Figure 33.Format 4, 8x Interpolator Mode ................................................................ 32
2
C Mode ................................................................. 27
2
S ........................................................................................... 32
CS4397
Contacting Cirrus Logic Support
For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:
http://www.cirrus.com/corporate/contacts/
“The I2C-Bus Specification: Version 2.0” Philips Semiconductors, December 1998.
http://www.semiconductors.philips.com
Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information descr ibes products which are in development and subj ect to development changes . Cirrus Logic, Inc. has made best eff orts to ensure 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). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or ot her rights
of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of
this publicati on may be copied, reproduced, stored i n a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photograp hic, or
otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or di sk may be printed for use by the user. However, no
part of the printout or electronic files may be copied, reproduced, sto red in a retrieval syst em, or t ransmitted, in any form or by any means (electronic, mechanical,
photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of thi s publication may be used as a basis for manufacture
or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing
in this document may be trademarks or ser vice marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirr us.com.
DS333F1 3
1.0 CHARACTERISTICS/SPECIFICATIONS
CS4397
ANALOG CHARACTERISTICS (T
Full-Scale Output Sine Wave, 997 Hz; MCLK = 12.288 MHz; SCLK = 3.072 MHz, Measurement Bandwidth 10 Hz
to 20 kHz, unless otherwise specified. Test load R
Parameter Symbol Min Typ Max Unit
= 25 °C; Logic "1" = VD = 5 V; VA = 5V; Logic "0" = DGND;
A
= 1 kΩ, CL = 10 pF)
L
Dynamic Performance - Single Speed Mode - Fs equal to 48 kHz
Dynamic Range (Note 1)
24-Bit unweighted
A-Weighted
16-Bit unweighted
(Note 2) A-Weighted
Total Harmonic Distortion + Noise (Note 1)
24-Bit 0 dB
-20 dB
-60 dB
16-Bit 0 dB
(Note 2) -20 dB
-60 dB
THD+N
TBD
TBD
-
-
-
-
-
-
-
-
117
120
95
98
-100
-97
-57
-95
-75
-35
-
-
-
-
TBD
TBD
TBD
-
-
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Dynamic Performance - Double Speed Mode - Fs equal to 96 kHz
Dynamic Range (Note 1)
24-Bit unweighted
A-Weighted
40 kHz bandwidth unweighted
16-Bit unweighted
(Note 2) A-Weighted
Total Harmonic Distortion + Noise (Note 1)
24-Bit 0 dB
-20 dB
-60 dB
16-Bit 0 dB
(Note 2) -20 dB
-60 dB
THD+N
TBD
TBD
TBD
-
-
-
-
-
-
-
-
117
120
114
92
98
-100
-97
-57
-95
-75
-35
-
-
-
-
-
TBD
TBD
TBD
-
-
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Dynamic Performance - Quad-Speed Mode - Fs equal to 192 kHz
Dynamic Range (Note 1)
24-Bit unweighted
A-Weighted
40 kHz bandwidth unweighted
16-Bit unweighted
(Note 2) A-Weighted
Total Harmonic Distortion + Noise (Note 1)
24-Bit 0 dB
-20 dB
-60 dB
16-Bit 0 dB
(Note 2) -20 dB
-60 dB
THD+N
TBD
TBD
TBD
-
-
-
-
-
-
-
-
117
120
114
92
98
-100
-97
-57
-95
-75
-35
-
-
-
-
-
TBD
TBD
TBD
-
-
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Notes: 1. Triangular PDF dithered data.
2. Performance limited by 16-bit quantization noise.
4 DS333F1
ANALOG CHARACTERISTICS (Continued)
CS4397
Parameter Symbol VD = 3 V VD = 5 V
Power Supplies
Supply Current normal operation
VA = 5 V normal operation
power-down state
Power Dissipation normal operation
VA = 5 V power-down
Power Supply Rejection Ratio (1 kHz) (Note 3)
(120 Hz)
Parameter Symbol Min
Min Typ Max Min Typ Max
I
A
I
D
ID + I
A
PSRR -
-
20
-
TBD
-
60
--TBD
0.3
60
-
40
TBD
TBD
TBD---TBD
-
20
-
TBD
-
-
30
0.3
-
-
60
-
-
40
Typ M ax
TBD
TBD
-
TBD-mW
-
-
Unit
mA
mA
µA
mW
dB
dB
Unit
Analog Output
Full Scale Differential Output Voltage TBD 1.4VREF TBD Vpp
Common Mode Voltage - 0.5VREF - VDC
Interchannel Gain Mismatch - 0.1 - dB
Gain Drift - 100 - ppm/°C
Differential DC Offset - 2.0 TBD mV
AC-Load Resistance R
Load Capacitance C
Interchannel Isolation (1 kHz) - 90 - dB
L
L
1--kΩ
- - 100 pF
Notes: 3. Valid with the recommended capacitor values on FILT+ and CMOUT as shown in Figure 1. Increasing
the capacitance will also increase the PSRR.
DS333F1 5
CS4397
ANALOG CHARACTERISTICS (Continued)
Parameter Symbol Min Typ Max Unit
Combined Digital and On-chip Analog Filter Response - Single Speed Mode
Passband (Note 4)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz -.020 - +0.015 dB
Passband Ripple - - ±0.0001 dB
StopBand .5465 - - Fs
StopBand Attenuation (Note 5) 102 - - dB
Group Delay (Note 6) tgd - 37/Fs - s
De-emphasis Error (Note 7)
Fs = 32 kHz
(Relative to 1 kHz) Fs = 44.1 kHz
Fs = 48 kHz
Combined Digital and On-chip Analog Filter Response - Double Speed Mode
Passband (Note 4)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz -0.017 - 0.035 dB
Passband Ripple - - ±0.0008 dB
StopBand .570 - - Fs
StopBand Attenuation (Note 5) 82 - - dB
Group Delay tgd - 20/Fs - s
Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode
Passband (Note 4)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz 0 - +0.015 dB
Passband Ripple - - ±0.00065 dB
StopBand 0.635 - - Fs
StopBand Attenuation (Note 5) 83 - - dB
Group Delay tgd - 11/Fs - s
-
-
-
-
-
0
0
-
-
-
-
-
-
-
-
-
-
-
0.470
0.492
±0.10
±0.10
±0.13
0.448
0.486
0.385
0.472
dB
dB
dB
Fs
Fs
Fs
Fs
Fs
Fs
Notes: 4. Response is clock dependent and will scale with Fs. Note that the response plots (
been normalized to Fs and can be de-normalized by multiplying the X-axis scale by Fs.
5. For Single-Speed Mode, the Measurement Bandwidth is 0.5465 Fs to 1.4 Fs.
For Double-Speed Mode, the Measurement Bandwidth is 0.570 Fs to 1.4 Fs.
For Quad-Speed Mode, the Measurement Bandwidth is 0.635 Fs to 1.3 Fs.
6. Group Delay for Fs=48 kHz 37/48 kHz=770 µs
7. De-emphasis is available only in Single Speed Mode.
6 DS333F1
Figures 9-28
) have
CS4397
ANALOG CHARACTERISTICS - DSD MODE (T
Logic "0" = AGND; Full-Scale Output Sine Wave, 997 Hz; Measurement Bandwidth 10 Hz to 20 kHz, unless otherwise specified. Test load R
Parameter Symbol Min Typ Max Unit
= 1 kΩ, CL = 10 pF)
L
= 25 °C; Logic "1" = VD = 5 V; VA = 5V;
A
Dynamic Performance - DSD Mode
Dynamic Range (Note 1)
unweighted
A-Weighted
Total Harmonic Distortion + Noise (Note 1)
0 dB
-20 dB
-60 dB
THD+N
TBD
TBD
-
-
-
117
120
-100
-94
-54
-
-
TBD
TBD
TBD
dB
dB
dB
dB
dB
Analog Output - DSD Mode
Full Scale Differential Output Voltage (Note 8) TBD 1.2VREF TBD Vpp
Common Mode Voltage - 0.5VREF - VDC
Interchannel Gain Mismatch - 0.1 - dB
Gain Drift - 100 - ppm/°C
Differential DC Offset - 2.0 TBD mV
Combined Digital and On-chip Analog Filter Response - DSD Mode
Passband (Note 4)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz -0.013 - 0 dB
Group Delay tgd - 0.2/Fs - s
-
-
-
-
0.95
2.70
Fs
Fs
Notes: 8. Assumes a DSD modulation index of 0.7.
DS333F1 7
CS4397
ANALOG CHARACTERISTICS - 8X INTERPOLATOR MODE (T
VD = 5 V; VA = 5V; Logic "0" = AGND; Full-Scale Output Sine Wave, 997 Hz; Base Band Fs = 48 kHz, SCLK =
6.144 MHz, Measurement Bandwidth 10 Hz to 20 kHz, unless otherwise specified. Test load R
10 pF)
Parameter Symbol Min Typ Max Unit
= 25 °C; Logic "1" =
A
= 1 kΩ, CL =
L
Dynamic Performance Mode
Dynamic Range (Note 1)
unweighted
A-Weighted
Total Harmonic Distortion + Noise (Note 1)
0 dB
-20 dB
-60 dB
THD+N
TBD
TBD
-
-
-
117
120
-100
-97
-57
-
-
TBD
TBD
TBD
dB
dB
dB
dB
dB
Analog Output
Full Scale Differential Output Voltage TBD 0.7VREF TBD Vpp
Common Mode Voltage - 0.5VREF - VDC
Interchannel Gain Mismatch - 0.1 - dB
Gain Drift - 100 - ppm/°C
Differential DC Offset - 2.0 TBD mV
Combined Digital and On-chip Analog Filter Response - 8x Interpolator Mode
Passband (Note 4)
to -0.1 dB corner
to -3 dB corner
Frequency Response 10 Hz to 20 kHz -0.0008 - 0 dB
Passband Ripple - - 0 dB
StopBand 6.08 - - Fs
StopBand Attenuation (Note 9) 56 - - dB
Group Delay tgd - 0.9/Fs - s
-
-
-
-
2.10
3.52
Fs
Fs
Notes: 9. Measurement Bandwidth is 6.08 to 9.6 Fs
8 DS333F1
CS4397
DIGITAL CHARACTERISTICS (T
Parameters Symbol Min Typ Max Units
High-Level Input Voltage VD = 5 V
Low-Level Input Voltage VD = 5 V
Input Leakage Current I
Input Capacitance - 8 - pF
Maximum MUTEC Drive Current - 3 - mA
= 25°C; VD = 3.0V - 5.25V)
A
V
VD = 3 V
VD = 3 V
IH
V
IL
in
2.0
2.0
-
-
--±10µA
-
-
-
-
-
-
0.8
0.8
V
V
V
V
ABSOLUTE MAXIMUM RATINGS (AGND = 0 V, all voltages with respect to ground.)
Parameter Symbol Min Max Unit
DC Power Supply: Positive Analog
Positive Digital
Reference Voltage
Input Current, Any Pin Except Supplies I
Digital Input Voltage V
Ambient Operating Temperature (power applied) T
Storage Temperature T
WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation
is not guaranteed at these extremes.
VA
VD
VREF
in
IND
A
stg
-0.3
-0.3
-0.3
-±10mA
-0.3 (VD)+0.4 V
-55 125 °C
-65 150 °C
6.0
6.0
VA
V
V
V
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Min Typ Max Unit
DC Power Supply: Positive Digital
Positive Analog
Reference Voltage
Specified Temperature Range T
VD
VA
VREF
(DGND = 0V; all voltages with respect to ground)
3.0
4.75
TBD
A
-10 - 70 °C
3.3
5.0
5.0
5.25
5.25
VA
V
V
V
DS333F1 9
CS4397
SWITCHING CHARACTERISTICS (T
1 = VD = 5.25 to 3.0 Volts; C
=20pF)
L
= -10 to 70°C; Logic 0 = AGND = DGND; Logic
A
Parameter Symbol Min Typ Max Unit
Input Sample Rate (Single-speed mode)
(Double-speed mode)
(Quad-speed mode)
Fs
Fs
Fs
16
50
100
-
-
-
50
100
200
kHz
kHz
kHz
LRCK Duty Cycle 45 50 55 %
MCLK Frequency (Single-speed 256 Fs,
Double speed 128 Fs or Quad-speed 64 Fs)
MCLK Frequency (Single-speed 384 Fs,
Double speed 192 Fs or Quad-speed, 96 Fs
MCLK Frequency (Single-speed 512 Fs,
Double speed 256 Fs or Quad-speed, 128 Fs
MCLK Frequency (Single-speed 768 Fs,
Double speed 384 Fs or Quad-speed, 192 Fs
4.096
6.144
8.192
12.288
- 12.8 MHz
- 19.2 MHz
- 25.6 MHz
- 38.4 MHz
MCLK Duty Cycle 40 50 60 %
SCLK Frequency (Single-speed mode)
(Double-speed mode)
(Quad-speed mode)
SCLK rising to LRCK edge delay t
SCLK rising to LRCK edge setup time t
SDATA valid to SCLK rising setup time t
SCLK rising to SDATA hold time t
slrd
slrs
sdlrs
sdh
-
-
-
-
-
-
256×Fs
128×Fs
64×Fs
20 --ns
20 --ns
20 --ns
20 --ns
Hz
Hz
Hz
LRCK
t
slrs
t
sdh
SCLK
SDATA
t
slrd
t
sdlrs
Figure 1. Serial Audio Input Timing
10 DS333F1
CS4397
DSD - SWITCHING CHARACTERISTICS (T
1 = VD = 5.25 to 3.0 Volts; C
Input Bit Rate per Channel (64x Oversampled)
Master Clock Frequency (CLKMODE = 0)
MCLK Duty Cycle (All DSD modes) 40 - 60 %
DSD_SCLK Pulse Width Low t
DSD_SCLK Pulse Width High t
DSD_SCLK Frequency (64x Oversampled)
DSD_LI_R valid to DSD_SCLK rising setup time t
DSD_SCLK rising to DSD_L or DSD_R hold time t
=20pF)
L
Parameter Symbol Min Typ Max Unit
(128x Oversampled)
(CLKMODE = 1)
(128x Oversampled)
= -10 to 70°C; Logic 0 = AGND = DGND; Logic
A
sclkl
sclkh
sdlrs
sdh
1.024
2.048
4.096
6.144
20 --ns
20 --ns
1.024
2.048
20 --ns
20 --ns
t
sclkh
t
sclkl
-
-
-
-
-
-
3.2
6.4
12.8
19.2
3.2
6.4
Mb/s
Mb/s
MHz
MHz
MHz
MHz
DSD_SCLK
DSD_L, DSD_R
Figure 2. Direct Stream Digital - Serial Audio Input Timing
sdlrstsdh
t
DS333F1 11
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