CIRRUS CS4397

CS4397
24-Bit, Multi-Standard D/A Converter for Digital Audio
Features
Description
l 24
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.
Bit Conversion
l Up to 192 kHz Sample Rates
l 120 dB Dynamic Range
l -100 dB THD+N
l Supports PCM, DSD and External
Interpolation filters
l Advanced Dynamic-Element Matching
l Low Clock Jitter Sensitivity
l Digital De-emphasis for 32 kHz, 44.1 kHz and
48 kHz
l External Reference Input
ORDERING INFORMATION
CS4397-KS -10° to 70° C 28-pin Plastic SOIC
CDB4397
Evaluation Board
I
SCLK
SERIAL INTERFACE
AND FORMAT SELECT
LRCK
DE-EMPHASIS
FILTER
SOFT MUTE
SDATA
MCLK
MULTI-BIT
∆Σ
MODULATOR
DYNAMIC
ELEMENT
MATCHING
LOGIC
SWITCHED
CAPACITOR-DAC
AND FILTER
AOUTL+
INTERPOLATION
FILTER
INTERPOLATION
FILTER
MULTI-BIT
∆Σ
MODULATOR
DYNAMIC
ELEMENT
MATCHING
LOGIC
SWITCHED
CAPACITOR-DAC
AND FILTER
AOUTR+
AOUTL-
CLOCK
DIVIDER
HARDWARE MODE CONTROL
(CONTROL PORT)
M4
M3
M2
M1
(AD0/CS) (AD1/CDIN) (SCL/CCLK)
Advance Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
AOUTR-
VOLTAGE REFERENCE
M0
RESET
(SDA/CDOUT)
MUTEC MUTE
FILT+
VREF
FILT-
CMOUT
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright  Cirrus Logic, Inc. 1999
(All Rights Reserved)
JUL ‘99
DS333PP1
1
CS4397
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
I2C® 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
8.2 I2C Mode ........................................................................................................... 26
8.2 Memory Address Pointer (MAP) ....................................................................... 26
9.0 PARAMETER DEFINITIONS ...................................................................................... 33
10.0 REFERENCES .......................................................................................................... 33
11.0 PACKAGE DIMENSIONS ......................................................................................... 34
2
DS333PP1
CS4397
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, I2C Mode ................................................................. 27
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, I2S .......................................................................................... 32
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
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 describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts 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 other 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 publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or
otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no
part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, 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 this 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 service 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.cirrus.com.
DS333PP1
3
CS4397
1.0 CHARACTERISTICS/SPECIFICATIONS
ANALOG CHARACTERISTICS (TA = 25 °C; Logic "1" = VD = 5 V; VA = 5V; Logic "0" = DGND;
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 RL = 1 kΩ, CL = 10 pF)
Parameter
Symbol
Min
Dynamic Performance - Single Speed Mode - Fs equal to 48 kHz
Dynamic Range
(Note 1)
TBD
24-Bit
unweighted
TBD
A-Weighted
16-Bit
unweighted
(Note 2)
A-Weighted
Total Harmonic Distortion + Noise
(Note 1) THD+N
24-Bit
0 dB
-20 dB
-60 dB
16-Bit
0 dB
(Note 2)
-20 dB
-60 dB
Dynamic Performance - Double Speed Mode - Fs equal to 96 kHz
Dynamic Range
(Note 1)
TBD
24-Bit
unweighted
TBD
A-Weighted
TBD
40 kHz bandwidth unweighted
16-Bit
unweighted
(Note 2)
A-Weighted
Total Harmonic Distortion + Noise
(Note 1) THD+N
24-Bit
0 dB
-20 dB
-60 dB
16-Bit
0 dB
(Note 2)
-20 dB
-60 dB
Dynamic Performance - Quad-Speed Mode - Fs equal to 192 kHz
Dynamic Range
(Note 1)
TBD
24-Bit
unweighted
TBD
A-Weighted
TBD
40 kHz bandwidth unweighted
16-Bit
unweighted
(Note 2)
A-Weighted
Total Harmonic Distortion + Noise
(Note 1) THD+N
24-Bit
0 dB
-20 dB
-60 dB
16-Bit
0 dB
(Note 2)
-20 dB
-60 dB
Typ
Max
Unit
117
120
95
98
-
dB
dB
dB
dB
-100
-97
-57
-95
-75
-35
TBD
TBD
TBD
-
dB
dB
dB
dB
dB
dB
117
120
114
92
98
-
dB
dB
dB
dB
dB
-100
-97
-57
-95
-75
-35
TBD
TBD
TBD
-
dB
dB
dB
dB
dB
dB
117
120
114
92
98
-
dB
dB
dB
dB
dB
-100
-97
-57
-95
-75
-35
TBD
TBD
TBD
-
dB
dB
dB
dB
dB
dB
Notes: 1. Triangular PDF dithered data.
2. Performance limited by 16-bit quantization noise.
4
DS333PP1
CS4397
ANALOG CHARACTERISTICS (Continued)
Parameter
Power Supplies
Supply Current
VA = 5 V
Symbol
normal operation
normal operation
power-down state
Power Dissipation
VA = 5 V
IA
ID
ID + IA
normal operation
power-down
Power Supply Rejection Ratio (1 kHz)
(Note 3)
(120 Hz)
Parameter
Analog Output
Full Scale Differential Output Voltage
Common Mode Voltage
Interchannel Gain Mismatch
Gain Drift
Differential DC Offset
AC-Load Resistance
Load Capacitance
Interchannel Isolation
PSRR
Symbol
RL
CL
(1 kHz)
VD = 3 V
Unit
VD = 5 V
Min
Typ
Max Min
Typ
Max
-
20
TBD
60
TBD
TBD
-
-
20
TBD
30
TBD
TBD
-
mA
mA
µA
-
TBD
0.3
TBD
-
-
TBD
0.3
TBD
-
mW
mW
-
60
40
-
-
60
40
-
dB
dB
Min
Typ
Max
Unit
TBD
1.4VREF
TBD
Vpp
-
0.5VREF
-
VDC
-
0.1
-
dB
-
100
-
ppm/°C
-
2.0
TBD
mV
1
-
-
kΩ
-
-
100
pF
-
90
-
dB
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.
DS333PP1
5
CS4397
ANALOG CHARACTERISTICS
Parameter
(Continued)
Symbol
Min
Typ
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
Passband Ripple
StopBand
.5465
StopBand Attenuation
(Note 5)
102
Group Delay
(Note 6)
tgd
37/Fs
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
0
to -3 dB corner
0
Frequency Response 10 Hz to 20 kHz
-0.017
Passband Ripple
StopBand
.570
StopBand Attenuation
(Note 5)
82
Group Delay
tgd
20/Fs
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
Passband Ripple
StopBand
0.635
StopBand Attenuation
(Note 5)
83
Group Delay
tgd
11/Fs
Max
Unit
0.470
0.492
Fs
Fs
+0.015
dB
±0.0001
dB
-
Fs
-
dB
-
s
±0.10
±0.10
±0.13
dB
dB
dB
0.448
0.486
Fs
Fs
0.035
dB
±0.0008
dB
-
Fs
-
dB
-
s
0.385
0.472
Fs
Fs
+0.015
dB
±0.00065
dB
-
Fs
-
dB
-
s
Notes: 4. Response is clock dependent and will scale with Fs. Note that the response plots (Figures 9-28) have
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
DS333PP1
CS4397
ANALOG CHARACTERISTICS - DSD MODE (TA = 25 °C; Logic "1" = VD = 5 V; VA = 5V;
Logic "0" = AGND; Full-Scale Output Sine Wave, 997 Hz; Measurement Bandwidth 10 Hz to 20 kHz, unless otherwise specified. Test load RL = 1 kΩ, CL = 10 pF)
Parameter
Dynamic Performance - DSD Mode
Dynamic Range
Total Harmonic Distortion + Noise
Symbol
(Note 1)
unweighted
A-Weighted
(Note 1) THD+N
0 dB
-20 dB
-60 dB
Min
Typ
Max
Unit
TBD
TBD
117
120
-
dB
dB
-
-100
-94
-54
TBD
TBD
TBD
dB
dB
dB
1.2VREF
TBD
Vpp
0.5VREF
-
VDC
0.1
-
dB
100
-
ppm/°C
2.0
TBD
mV
-
0.95
2.70
Fs
Fs
-
0
dB
0.2/Fs
-
s
Analog Output - DSD Mode
Full Scale Differential Output Voltage
(Note 8)
TBD
Common Mode Voltage
Interchannel Gain Mismatch
Gain Drift
Differential DC Offset
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
Group Delay
tgd
Notes: 8. Assumes a DSD modulation index of 0.7.
DS333PP1
7
CS4397
ANALOG CHARACTERISTICS - 8X INTERPOLATOR MODE (TA = 25 °C; Logic "1" =
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 RL = 1 kΩ, CL =
10 pF)
Parameter
Dynamic Performance Mode
Dynamic Range
Total Harmonic Distortion + Noise
Symbol
(Note 1)
unweighted
A-Weighted
(Note 1) THD+N
0 dB
-20 dB
-60 dB
Min
Typ
Max
Unit
TBD
TBD
117
120
-
dB
dB
-
-100
-97
-57
TBD
TBD
TBD
dB
dB
dB
Analog Output
Full Scale Differential Output Voltage
TBD
0.7VREF
Common Mode Voltage
0.5VREF
Interchannel Gain Mismatch
0.1
Gain Drift
100
Differential DC Offset
2.0
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
Passband Ripple
StopBand
6.08
StopBand Attenuation
(Note 9)
56
Group Delay
tgd
0.9/Fs
TBD
Vpp
-
VDC
-
dB
-
ppm/°C
TBD
mV
2.10
3.52
Fs
Fs
0
dB
0
dB
-
Fs
-
dB
-
s
Notes: 9. Measurement Bandwidth is 6.08 to 9.6 Fs
8
DS333PP1
CS4397
DIGITAL CHARACTERISTICS (TA = 25°C; VD =
3.0V - 5.25V)
Parameters
High-Level Input Voltage
Low-Level Input Voltage
Input Leakage Current
Input Capacitance
Maximum MUTEC Drive Current
VD = 5 V
VD = 3 V
VD = 5 V
VD = 3 V
Symbol
VIH
VIL
Iin
Min
2.0
2.0
-
Typ
8
3
Max
0.8
0.8
±10
-
Units
V
V
V
V
µA
pF
mA
ABSOLUTE MAXIMUM RATINGS (AGND = 0 V, all voltages with respect to ground.)
Parameter
DC Power Supply: Positive Analog
Positive Digital
Reference Voltage
Input Current, Any Pin Except Supplies
Digital Input Voltage
Ambient Operating Temperature (power applied)
Storage Temperature
Symbol
VA
VD
VREF
Iin
VIND
TA
Tstg
Min
-0.3
-0.3
-0.3
-0.3
-55
-65
Max
6.0
6.0
VA
±10
(VD)+0.4
125
150
Unit
V
V
V
mA
V
°C
°C
WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation
is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS (DGND = 0V; all voltages with respect to ground)
Parameter
DC Power Supply: Positive Digital
Positive Analog
Reference Voltage
Specified Temperature Range
DS333PP1
Symbol
VD
VA
VREF
TA
Min
3.0
4.75
TBD
-10
Typ
3.3
5.0
5.0
-
Max
5.25
5.25
VA
70
Unit
V
V
V
°C
9
CS4397
SWITCHING CHARACTERISTICS (TA= -10 to 70°C; Logic 0 = AGND = DGND; Logic
1 = VD = 5.25 to 3.0 Volts; CL = 20 pF)
Parameter
Input Sample Rate
(Single-speed mode)
(Double-speed mode)
(Quad-speed mode)
LRCK Duty Cycle
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
MCLK Duty Cycle
SCLK Frequency
(Single-speed mode)
(Double-speed mode)
(Quad-speed mode)
SCLK rising to LRCK edge delay
SCLK rising to LRCK edge setup time
SDATA valid to SCLK rising setup time
SCLK rising to SDATA hold time
Symbol
Fs
Fs
Fs
tslrd
tslrs
tsdlrs
tsdh
Min
16
50
100
45
Typ
50
Max
50
100
200
55
Unit
kHz
kHz
kHz
%
4.096
-
12.8
MHz
6.144
-
19.2
MHz
8.192
-
25.6
MHz
12.288
-
38.4
MHz
40
20
20
20
20
50
-
60
256×Fs
128×Fs
64×Fs
-
%
Hz
Hz
Hz
ns
ns
ns
ns
LRCK
t slrs
t slrd
SCLK
t sdlrs
t sdh
SDATA
Figure 1. Serial Audio Input Timing
10
DS333PP1
CS4397
DSD - SWITCHING CHARACTERISTICS (TA= -10 to 70°C; Logic 0 = AGND = DGND; Logic
1 = VD = 5.25 to 3.0 Volts; CL = 20 pF)
Parameter
Input Bit Rate per Channel
Master Clock Frequency
MCLK Duty Cycle
DSD_SCLK Pulse Width Low
DSD_SCLK Pulse Width High
DSD_SCLK Frequency
Symbol
(64x Oversampled)
(128x Oversampled)
(CLKMODE = 0)
(CLKMODE = 1)
(All DSD modes)
tsclkl
tsclkh
(64x Oversampled)
(128x Oversampled)
DSD_LI_R valid to DSD_SCLK rising setup time
DSD_SCLK rising to DSD_L or DSD_R hold time
tsdlrs
tsdh
Min
1.024
2.048
4.096
6.144
40
20
20
1.024
2.048
20
20
Typ
-
Max
3.2
6.4
12.8
19.2
60
3.2
6.4
-
Unit
Mb/s
Mb/s
MHz
MHz
%
ns
ns
MHz
MHz
ns
ns
t sclkh
t sclkl
DSD_SCLK
t sdlrs
t sdh
DSD_L, DSD_R
Figure 2. Direct Stream Digital - Serial Audio Input Timing
DS333PP1
11
CS4397
8X INTERPOLATOR - SWITCHING CHARACTERISTICS (TA= -10 to 70°C;
Logic 0 = AGND = DGND; Logic 1 = VD = 5.25 to 3.0 Volts; CL = 20 pF)
Parameter
Input Sample Rate
MCLK Frequency
(Note 10)
(MCLK = 32×Fs)
(MCLK = 48×Fs)
(MCLK = 64×Fs)
(MCLK = 96×Fs)
MCLK Duty Cycle
WCKI Duty Cycle
BCKI Frequency
BCKI rising to WCKI edge delay
BCKI rising to WCKI edge setup time
SDATA valid to BCKI rising setup time
BCKI rising to DIL/DIR hold time
Symbol
Fs
Min
128
4.096
6.144
8.192
12.288
40
25
Typ
-
tslrd
tslrs
tsdlrs
tsdh
20
20
20
20
-
Max
400
12.8
19.2
25.6
28.4
50
75
32xFs
-
Unit
kHz
MHz
MHz
MHz
MHz
%
%
MHz
ns
ns
ns
ns
Notes: 10. Fs refers to the input sample rate to the Digital-to-Analog converter, i.e. Fs = 44.1 kHz × 8 = 352.8 kHz.
WCKI
t sclkh
t slrs
t slrd
t sclkl
BCKI
t sdlrs
t sdh
DIL/DIR
Figure 3. Serial Audio Input Timing
12
DS333PP1
CS4397
SWITCHING CHARACTERISTICS - CONTROL PORT
(TA = 25 °C; VD = 5.25 V to 3.0 Volts; Inputs: logic 0 = AGND, logic 1 = VD, CL = 30 pF)
Parameter
Symbol
Min
Max
Unit
Mode
SCL Clock Frequency
fscl
-
100
KHz
RST Rising Edge to Start
tirs
500
-
ns
Bus Free Time Between Transmissions
tbuf
4.7
-
µs
Start Condition Hold Time (prior to first clock pulse)
thdst
4.0
-
µs
Clock Low time
tlow
4.7
-
µs
Clock High Time
thigh
4.0
-
µs
Setup Time for Repeated Start Condition
tsust
4.7
-
µs
thdd
0
-
µs
tsud
250
-
ns
Rise Time of Both SDA and SCL Lines
tr
-
1
µs
Fall Time of Both SDA and SCL Lines
tf
-
300
ns
tsusp
4.7
-
µs
I2C®
SDA Hold Time from SCL Falling
(Note 11)
SDA Setup time to SCL Rising
Setup Time for Stop Condition
Notes: 11. Data must be held for sufficient time to bridge the 300 ns transition time of SCL.
RST
t irs
Stop
Repeated
Start
Start
Stop
SDA
t buf
t
t high
t hdst
tf
hdst
t susp
SCL
t
low
t
hdd
t sud
t sust
tr
Figure 4. I2C Control Port Timing
DS333PP1
13
CS4397
SWITCHING CHARACTERISTICS - CONTROL PORT
(TA = 25 °C; VD = 5.25 V to 3.0 Volts; Inputs: logic 0 = AGND, logic 1 = VD, CL = 30 pF)
Parameter
Symbol
Min
Max
Unit
SPI Mode
CCLK Clock Frequency
fsclk
-
6
MHz
RST Rising Edge to CS Falling
tsrs
500
-
ns
tspi
500
-
ns
CS High Time Between Transmissions
tcsh
1.0
-
µs
CS Falling to CCLK Edge
tcss
20
-
ns
CCLK Low Time
tscl
66
-
ns
CCLK High Time
tsch
66
-
ns
CDIN to CCLK Rising Setup Time
tdsu
40
-
ns
CCLK Edge to CS Falling
(Note 12)
CCLK Rising to DATA Hold Time
(Note 13)
tdh
15
-
ns
Rise Time of CCLK and CDIN
(Note 14)
tr2
-
100
ns
Fall Time of CCLK and CDIN
(Note 14)
tf2
-
100
ns
tov
45
CCLK Falling to CDOUT valid
ns
Notes: 12. tspi only needed before first falling edge of CS after RST rising edge. tspi = 0 at all other times.
13. Data must be held for sufficient time to bridge the transition time of CCLK.
14. For FSCK < 1 MHz
RST
t srs
CS
t spi t css
t scl
t sch
t csh
CCLK
t r2
t f2
CDIN
t dsu
t dh
CDOUT
t ov
Figure 5. SPI Control Port Timing
14
DS333PP1
CS4397
2.0 TYPICAL CONNECTION DIAGRAM
+5 to +3 V
Digital
+ 1 µF
0.1 µF
5
Mode
Select
(Control Port)
14
4
3
2
16
12
11
Audio
Data
Processor
0.1 µf +1.0 µF
7
8
VD
VD
M0 (SDA/CDOUT)
22
VA
VREF
FILT+
0.1 µf
27
M3 (AD1/CDIN)
FILT- 26
M4 (AD0/CS)
C/H
CMOUT
CS4397
LRCK
AOUTL-
+5V
Analog
28
M1 (GND)
M2 (SCL/CCLK)
+5V
Analog
0.1 µf
+ 100 µf
0.1 µf
5.6 µf
25
+
24
Analog
Conditioning
SCLK
AOUTL+ 23
13
15
1
10
SDATA
MUTE
MUTEC 17
AOUTR-
19
Analog
Conditioning
RST
MCLK
DGND
9
6
AOUTR+ 20
AGND
21
18
External Clock
Figure 6. Typical Connection Diagram - Hardware Mode (Control Port Mode)
DS333PP1
15
CS4397
3.0 REGISTER DESCRIPTION
3.1 DIFFERENTIAL DC OFFSET CALIBRATION
Mode Control Register (address 01h)
7
CAL
6
MUTE
5
M4
4
M3
3
M2
2
M1
1
M0
0
PDN
Access:
R/W in I2C and SPI.
Default:
0 - Disabled
Function:
Enabling this function will initiate a calibration to minimize the differential DC offset. This function will be
automatically reset following completion of the calibration sequence.
CAL
0
1
MODE
Disabled : CAL complete
Enabled : CAL initiated
Table 1.
3.2 SOFT MUTE
Mode Control Register (address 01h)
7
6
5
4
3
2
1
0
CAL
MUTE
M4
M3
M2
M1
M0
PDN
Access:
R/W in I2C and SPI.
Default:
0 - Enabled
Function:
The analog outputs will ramp to a muted state when enabled. The ramp requires 1152 left/right clock cycles in Single Speed, 2304 cycles in Double Speed and 4608 cycles in Quad Speed mode. The bias voltage on the outputs will be retained and MUTEC will go low at the completion of the ramp period.
The analog outputs will ramp to a normal state when this function transitions from the enabled to disabled
state. The ramp requires 1152 left/right clock cycles in Single Speed, 2304 cycles in Double Speed and
4608 cycles in Quad Speed mode. The MUTEC will go high immediately on disabling of MUTE.
MUTE
0
1
MODE
Enabled
Disabled
Table 2.
16
DS333PP1
CS4397
3.3 MODE SELECT
Mode Control Register (address 01h)
7
CAL
6
MUTE
5
M4
4
M3
3
M2
2
M1
1
M0
0
PDN
Access:
R/W in I2C and SPI.
Default:
00000
Function:
The Mode Select pins determine the operational mode of the device as detailed in Tables 9-14. The options include:
Selection of the Digital Interface Format which determines the required relationship between the
Left/Right clock, serial clock and serial data as detailed in Figures 29-33
Selection of the standard 15 µs/50 µs digital de-emphasis filter response, Figure 28, which requires reconfiguration of the digital filter to maintain the proper filter response for 32, 44.1 or 48 kHz sample rates.
Selection of the appropriate clocking mode to match the input sample rates.
Access to the Direct Stream Digital Mode
Access to the 8x Interpolation Input Mode
3.4 POWER DOWN
Mode Control Register (address 01h)
7
CAL
6
MUTE
5
M4
4
M3
3
M2
2
M1
1
M0
0
PDN
Access:
R/W in I2C and SPI.
Default:
1 - Powered Down
Function:
The analog and digital sections will be placed into a power-down mode when this function is enabled. This
bit must be cleared to resume normal operation.
PDN
0
1
MODE
Disabled
Enabled
Table 3.
DS333PP1
17
CS4397
4.0 PIN DESCRIPTION - PCM MODE
Reset
RST
See Description
M4(AD0/CS)
See Description
M3(AD1/CDIN)
See Description
M2(SCL/CCLK)
See Description M0(SDA/CDOUT)
Digital Ground
DGND
Digital Power
VD
Digital Power
VD
Digital Ground
DGND
Master Clock
MCLK
Serial Clock
SCLK
Left/Right Clock
LRCK
Serial Data
SDATA
See Description
M1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREF
FILT+
FILTCMOUT
AOUTLAOUTL+
VA
AGND
AOUTR+
AOUTRAGND
MUTEC
C/H
MUTE
Voltage Reference
Reference Filter
Reference Ground
Common ModeS Voltage
Differential Output
Differential Output
Analog Power
Analog Ground
Differential Output
Differential Output
Analog Ground
Mute Control
Control port/Hardware select
Soft Mute
Reset - RST
Pin 1, Input
Function:
The device enters a low power mode and all internal state machines registers are reset when low. When
high, the device will be in a normal operation mode .
RST
0
1
DESCRIPTION
Enabled
Normal operation mode
Digital Ground - DGND
Pins 6 and 9, Inputs
Function:
Digital ground reference.
Digital Power - VD
Pins 7 and 8, Input
Function:
Digital power supply. Typically 5.0 to 3.0 VDC.
Master Clock - MCLK
Pin 10, Input
Function:
The master clock frequency must be either 256x, 384x, 512x or 768x the input sample rate in Single
Speed Mode; either 128x, 192x 256x or 384x the input sample rate in Double Speed Mode; or 64x, 96x
128x or 192x the input sample rate in Quad Speed Mode. Tables 4-6 illustrate the standard audio sample
rates and the required master clock frequencies.
18
DS333PP1
CS4397
Sample Rate
(kHz)
32
44.1
48
256x
8.1920
11.2896
12.2880
MCLK (MHz)
384x
512x
12.2880
16.3840
16.9344
22.5792
18.4320
24.5760
768x
24.5760
33.8688
36.8640
Table 4. Single Speed (16 to 50 kHz sample rates) Common Clock Frequencies
Sample Rate
(kHz)
64
88.2
96
128x
8.1920
11.2896
12.2880
MCLK (MHz)
192x
256x
12.2880
16.3840
16.9344
22.5792
18.4320
24.5760
384x
24.5760
33.8688
36.8640
Table 5. Double Speed (50 to 100 kHz sample rates) Common Clock Frequencies
Sample Rate
(kHz)
176.4
192
MCLK (MHz)
64x
11.2896
12.2880
96x
16.9344
18.4320
128x
22.5792
24.5760
192x
33.8688
36.8640
Table 6. Quad Speed (100 to 200 kHz sample rates) Common Clock Frequencies
Serial Clock - SCLK
Pin 11, Input
Function:
Clocks individual bits of serial data into the SDATA pin. The required relationship between the Left/Right
clock, serial clock and serial data is defined by either the Mode Control Byte in Control Port Mode or the
M0 - M4 pins in Hardware Mode. The options are detailed in Figures 29-33
Left/Right Clock - LRCK
Pin 12, Input
Function:
The Left/Right clock determines which channel is currently being input on the serial audio data input,
SDATA. The frequency of the Left/Right clock must be at the input sample rate. Audio samples in
Left/Right sample pairs will be simultaneously output from the digital-to-analog converter whereas
Right/Left pairs will exhibit a one sample period difference. The required relationship between the
Left/Right clock, serial clock and serial data is defined by the Mode Control Byte and the options are detailed in Figures 29-33
Serial Audio Data - SDATA
Pin 13, Input
Function:
Two’s complement MSB-first serial data is input on this pin. The data is clocked into SDATA via the serial
clock and the channel is determined by the Left/Right clock. The required relationship between the
Left/Right clock, serial clock and serial data is defined by the Mode Control Byte and the options are detailed inin Figures 29-33
Soft Mute - MUTE
Pin 15, Input
Function:
The analog outputs will ramp to a muted state when enabled. The ramp requires 1152 left/right clock cy-
DS333PP1
19
CS4397
cles in Single Speed, 2304 cycles in Double Speed and 4608 cycles in Quad Speed mode. The bias voltage on the outputs will be retained and MUTEC will go active at the completion of the ramp period.
The analog outputs will ramp to a normal state when this function transitions from the enabled to disabled
state. The ramp requires 1152 left/right clock cycles in Single Speed, 2304 cycles in Double Speed and
4608 cycles in Quad Speed mode. The MUTEC will release immediately on setting MUTE = 1.
The converter analog outputs will mute when enabled. The bias voltage on the outputs will be retained
and MUTEC will go active during the mute period.
Mute
0
1
DESCRIPTION
Enabled
Normal operation mode
Control Port / Hardware Mode Select - C/H
Pin 16, Input
Function:
Determines if the device will operate in either the Hardware Mode or Control Port Mode.
C/H
0
1
DESCRIPTION
Hardware Mode Enabled
Control Port Mode Enabled
Mute Control - MUTEC
Pin 17, Output
Function:
The Mute Control pin goes low during power-up initialization, reset, muting, master clock to left/right clock
frequency ratio is incorrect or power-down. This pin is intended to be used as a control for an external mute
circuit to prevent the clicks and pops that can occur in any single supply system. Use of Mute Control is not
mandatory but recommended for designs requiring the absolute minimum in extraneous clicks and pops.
Analog Ground - AGND
Pins 18 and 21, Inputs
Function:
Analog ground reference.
Differential Analog Outpus - AOUTR- , AOUTR+ and AOUTL- , AOUTL+
Pins 19, 20, 23 and 24, Outputs
Function:
The full scale differential analog output level is specified in the Analog Characteristics specifications table.
Analog Power - VA
Pin 22, Input
Function:
Power for the analog and reference circuits. Typically 5VDC.
20
DS333PP1
CS4397
Common Mode Voltage - CMOUT
Pin 25, Output
Function:
Filter connection for internal bias voltage, typically 50% of VREF. Capacitors must be connected from
CMOUT to analog ground, as shown in Figure 6. CMOUT has a typical source impedence of 25 kΩ and
any current drawn from this pin will alter device performance
Reference Ground - FILT-
Pin 26, Input
Function:
Ground reference for the internal sampling circuits. Must be connected to analog ground.
Reference Filter - FILT+
Pin 27, Output
Function:
Positive reference for internal sampling circuits. External capacitors are required from FILT+ to analog
ground, as shown in Figure 6. The recommended values will typically provide 60 dB of PSRR at 1 kHz
and 40 dB of PSRR at 120 Hz. FILT+ is not intended to supply external current.
Voltage Reference Input- VREF
Pin 28, Input
Function:
Analog voltage reference. Typically 5VDC.
HARDWARE MODE
Mode Select - M0, M1, M2, M3, M4
Pins 2, 3, 4, 5 and 14, Inputs
Function:
The Mode Select pins determine the operational mode of the device as detailed in Tables 9-14. The options include;
Selection of the Digital Interface Format which determines the required relationship between the
Left/Right clock, serial clock and serial data as detailed in Figures 29-33
Selection of the standard 15 µs/50 µs digital de-emphasis filter response, Figure 28, which requires reconfiguration of the digital filter to maintain the proper filter response for 32, 44.1 or 48 kHz sample rates.
Selection of the appropriate clocking mode to match the input sample rates.
Access to the Direct Stream Digital Mode
Access to the 8x Interpolation Input Mode
CONTROL PORT MODE
Address Bit 0 / Chip Select - AD0 / CS
Pin 2, Input
Function:
In I2C mode, AD0 is a chip address bit. CS is used to enable the control port interface in SPI mode. The
device will enter the SPI mode at anytime a high to low transition is detected on this pin. Once the device
has entered the SPI mode, it will remain until either the part is reset or undergoes a power-down cycle.
DS333PP1
21
CS4397
Address Bit 1 / Control Data Input - AD1/CDIN
Pin 3, Input
Function:
In I2C mode, AD1 is a chip address bit. CDIN is the control data input line for the control port interface in
SPI mode.
Serial Control Interface Clock - SCL/CCLK
Pin 4, Input
Function:
In I2C mode, SCL clocks the serial control data into or from SDA/CDOUT.
In SPI mode, CCLK clocks the serial data into AD1/CDIN and out of SDA/CDOUT.
Serial Control Data I/O - SDA/CDOUT
Pin 5, Input/Output
Function:
In I2C mode, SDA is a data input/output. CDOUT is the control data output for the control port interface in
SPI mode.
M1 - Mode Select
Pin 14, Input
Function:
This pin is not used in Control Port Mode and must be terminated to ground.
22
DS333PP1
CS4397
5.0 PIN DESCRIPTION - DSD MODE
Refer to PCM mode
RST
Refer to PCM mode
M4(ADO/CS)
Refer to PCM mode M3(AD1/CDIN)
Refer to PCM mode M2(SCL/CCLK)
Refer to PCM mode M0(SDA/CDOUT)
Refer to PCM mode
DGND
Refer to PCM mode
VD
Refer to PCM mode
VD
Refer to PCM mode
DGND
Master Clock
MCLK
DSD Serial Clock
DSD_SCLK
Master Clock Mode
CLKMODE
Left Channel Data
DSD_L
Right Channel Data
DSD_R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREF
FILT+
FILTCMOUT
AOUTLAOUTL+
VA
AGND
AOUTR+
AOUTRAGND
MUTEC
C/H
MUTE
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Master Clock - MCLK
Pin 10, Input
Function:
The master clock frequency must be either 4x or 6x the DSD data rate for 64x oversampled DSD data
and 2x or 3x the DSD data rate for 128x oversampled DSD data, refer to Table 7.
CLKMODE
Pin 12, Input
Function:
This pin determines the allowable Master Clock to DSD data ratio as defined in Table 7.
CLKMODE
DSD OverSampling Ratio
64x
128x
0
4x
2x
1
6x
3x
Table 7. MCLK to DSD Data Rate Clock Ratios
DSD Serial Clock - DSD_SCLK
Pin 11, Input
Function:
Clocks the individual bits of the DSD audio data into the DSD_L and DSD_R pins.
Audio Data - DSD_L and DSD_R
Pins 13 and 14, Inputs
Function:
Direct Stream Digital audio data is clocked into DSD_L and DSD_R via the DSD serial clock.
DS333PP1
23
CS4397
6.0 PIN DESCRIPTION - 8X INTERPOLATOR MODE
Refer to PCM mode
RST
Refer to PCM mode
M4(AD0/CS)
Refer to PCM mode
M3(AD1/CDIN)
Refer to PCM mode
M2(SCL/CCLK)
Refer to PCM mode M0(SDA/CDOUT)
Refer to PCM mode
DGND
Refer to PCM mode
VD
Refer to PCM mode
VD
Refer to PCM mode
DGND
Master Clock
MCLK
Bit Clock
BCKI
Word Clock
WCKI
Left Channel Data
DIL
Right Channel Data
DIR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VREF
FILT+
FILTCMOUT
AOUTLAOUTL+
VA
AGND
AOUTR+
AOUTRAGND
MUTEC
C/H
MUTE
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Refer to PCM mode
Master Clock - MCLK
Pin 10, Input
Function:
The master clock frequency must be either 32x, 48x, 64x or 96x the input sample rate. Table 8 illustrates
the standard audio sample rates and the required master clock frequencies.
Sample Rate
(kHz)
32 x 8
44.1 x 8
48 x 8
32x
8.1920
11.2896
12.2880
MCLK (MHz)
48x
64x
12.2880
16.384
16.9344
22.579
18.4320
24.576
96x
24.576
33.869
36.864
Table 8. Common Clock Frequencies
Bit Clock - BCKI
Pin 11, Input
Function:
Clocks the individual serial data bits into the DIL and DIR pins. Refer to Figure 33
Word Clock - WCKI
Pin 12, Input
Function:
The word clock determines which channel is currently being input on the serial audio data input, SDATA.
The frequency of the word clock must be at 8x the baseband sample rate. Refer to Figure 33.
Serial Audio Data - DIR and DIL
Pins 12 and 13, Inputs
Function:
Two’s complement MSB-first serial data is input on these pins. The data is clocked into DIL and DIR via
the bit clock. Refer to Figure 33.
24
DS333PP1
CS4397
7.0 APPLICATIONS
7.1 Recommended Power-up Sequence
1. Hold RST low until the power supplies, master, and left/right clocks are stable.
2. Bring RST high.
DS333PP1
25
CS4397
8.0 CONTROL PORT INTERFACE
The control port is used to load all the internal settings of the CS4397. The operation of the control port
may be completely asynchronous to the audio sample rate. However, to avoid potential interference problems, the control port pins should remain static if no operation is required.
The control port has 2 modes: SPI and I2C, with the CS4397 operating as a slave device in both modes. If
I2C operation is desired, AD0/CS should be tied to VD or DGND. If the CS4397 ever detects a high to low
transition on AD0/CS after power-up, SPI mode will be selected.
8.1 SPI Mode
In SPI mode, CS is the CS4397 chip select signal, CCLK is the control port bit clock, CDIN is the input
data line from the microcontroller, CDOUT is the data output and the chip address is 0010000. The data
is clocked on the rising edge of CCLK.
Figure 7 shows the operation of the control port in SPI mode. To write to a register, bring CS low. The first
7 bits on CDIN form the chip address, and must be 0010000. The eighth bit is a read/write indicator (R/W).
The next 8 bits form the Memory Address Pointer (MAP), which is set to 01h. The next 8 bits are the data
which will be placed into the register designated by the MAP.
8.2 I2C Mode
In I2C mode, SDA is a bi-directional data line. Data is clocked into and out of the part by the clock, SCL,
with the clock to data relationship as shown in Figure 3. There is no CS pin. Pins AD0 and AD1 form the
partial chip address and should be tied to VD or DGND as required. The 7-bit address field, which is the
first byte sent to the CS4397, must be 00100(AD1)(AD0) where (AD1) and (AD0) match the setting of the
AD0 and AD1 pins. The eighth bit of the address byte is the R/W bit (high for a read, low for a write). If
the operation is a write, the next byte is the Memory Address Pointer, MAP, which selects the register to
be read or written. The MAP is then followed by the data to be written. If the operation is a read, then the
contents of the register pointed to by the MAP will be output after the chip address.
For more information on I2C, please see “The I2C-Bus Specification: Version 2.0”, listed in the References
section.
Memory Address Pointer (MAP)
7
INCR
0
6
Reserved
0
5
Reserved
0
INCR (Auto MAP Increment Enable)
Default = ‘0’
0 - Disabled
1 - Enabled
26
4
Reserved
0
3
Reserved
0
2
MAP2
0
1
MAP1
0
0
MAP0
1
MAP0-2 (Memory Address Pointer)
Default = ‘001’
DS333PP1
CS4397
CS
CCLK
CHIP
ADDRESS
CDIN
0010000
MAP
R/W
DATA
LSB
MSB
byte 1
byte n
MAP = Memory Address Pointer = 0
Figure 7. Control Port Timing, SPI mode
Note 1
SDA
001000
ADDR
AD0
R/W
ACK
DATA
1-8
ACK
DATA
1-8
ACK
SCL
Start
Stop
Note: If operation is a write, this byte contains the Memory Address Pointer, MAP.
Figure 8. Control Port Timing, I2C Mode
DS333PP1
27
CS4397
M4
0
0
0
0
M1
(DIF1)
0
0
1
1
M0
(DIF0)
0
1
0
1
DESCRIPTION
FORMAT
FIGURE
0
1
2
3
29
30
31
33
Left Justified, up to 24-bit data
I2S, up to 24-bit data
Right Justified, 16-bit Data
Right Justified, 24-bit Data
Table 9. Single Speed (16 to 50 kHz) Digital Interface Format Options
M4
0
0
0
0
M3
(DEM1)
0
0
1
1
M2
(DEM0)
0
1
0
1
DESCRIPTION
32 kHz De-Emphasis
44.1 kHz De-Emphasis
48 kHz De-Emphasis
De-Emphasis Disabled
FIGURE
28
28
28
-
Table 10. Single Speed (16 to 50 kHz) De-Emphasis Options
M4
1
1
1
1
M3
1
1
1
1
M2
1
1
1
1
M1
0
0
1
1
M0
0
1
0
1
DESCRIPTION
Left Justified up to 24-bit data, Format 0
I2S up to 24-bit data, Format 1
Right Justified 16-bit data, Format 2
Right Justified 24-bit data, Format 3
Table 11. Double Speed (50 to 100 kHz) Sample Rate Mode Options
M4
1
1
1
1
M3
1
1
1
1
M2
0
0
0
0
M1
0
0
1
1
M0
0
1
0
1
DESCRIPTION
Left Justified up to 24-bit data, Format 0
I2S up to 24-bit data, Format 1
Right Justified 16-bit data, Format 2
Right Justified 24-bit data, Format 3
Table 12. Quad (100 to 200 kHz) Sample Rate Mode Options
M4
1
M3
0
M2
0
1
0
0
M1
0
(DIR)
0
(DIR)
M0
0
1
DESCRIPTION
Right Justified 20-bit data
Right Justified 24-bit data
Table 13. 8x Interpolated Input Mode Options
M4
1
M3
0
M2
1
1
0
1
M1
0
(DSD_R)
0
(DSD_R)
M0
0
1
DESCRIPTION
64x Oversampled DSD
128x Oversampled DSD
Table 14. Direct Stream Digital Options
28
DS333PP1
0
0
-20
-20
-40
-40
Amplitude dB
Amplitude dB
CS4397
-60
-80
-100
-60
-80
-100
-120
-120
-140
-140
-160
0.460.47 0.48
0.480.49 0.50.50
0.56
0.580.59 0.6
0.6
0.45 0.46
0.51 0.520.52
0.53 0.540.54
0.55 0.56
0.57 0.58
-160
0.45
0.5
0.55
0.6
0
0.1
-1
0.08
-2
0.06
-3
0.04
-4
-5
-6
-7
0.8
0.85
0.9
0.95
1
0
-0.02
-0.04
-8
-0.06
-9
-0.08
-0.1
0.46
0.47
0.48
0.49
0.5
0.51
0.52
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Frequency (normalized to Fs)
Figure 11. Single-speed Transition Band
Figure 12. Single-speed Frequency Response
0
0
-20
-20
-40
-40
Amplitude dB
Amplitude dB
0.75
0.02
Frequency (normalized to Fs)
-60
-80
-60
-80
-100
-100
-120
-120
-140
-140
0.4
0.45
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
0.4
1
0.45
Figure 13. Double-speed Stopband
0.1
0.08
-2
0.06
-3
0.04
Amplitude dB
0
-4
-5
-6
-7
0.6
0.02
0
-0.02
-0.04
-8
-0.06
-9
-0.08
-0.1
0.43
0.44
0.45
0.46
0.47
0.48
0.49
0.5
Frequency (normalized to Fs)
Figure 15. Double-speed Transition Band
DS333PP1
0.55
Figure 14. Double-speed Transition Band
-1
-10
0.42
0.5
Frequency (normalized to Fs)
Frequency (normalized to Fs)
Amplitude dB
0.7
Figure 10. Single-speed Stopband Rejection
Amplitude dB
Amplitude dB
Figure 9. Single-speed Transition Band
-10
0.45
0.65
Frequency (normalized to Fs)
Frequency (normalized to Fs)
0.51
0.52
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Frequency (normalized to Fs)
Figure 16. Double-speed Frequency Response
29
0
0
-20
-20
-40
-40
Amplitude dB
Amplitude dB
CS4397
-60
-80
-100
-60
-80
-100
-120
-120
-140
-140
-160
-160
0.4
0.45
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
0.5
0.52
0.54
0.56
Frequency (normalized to Fs)
0
0.1
-1
0.08
-2
0.06
-3
0.04
-4
-5
-6
-7
0.66
0.68
0.7
0
-0.04
-8
-0.06
-9
-0.08
-0.1
0.37
0.39
0.41
0.43
0.45
0.47
0.49
0.51
0.53
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Frequency (normalized to Fs)
Figure 20. Quad-speed Frequency Response
20
0
-20
0
-40
-20
Amplitude dB
Amplitude dB
0.64
-0.02
Figure 19. Quad-speed Transition Band
-60
-80
-40
-60
-100
-80
-120
-100
-120
-140
.3
0.6
0.7
.4
0.8
0.9
.5
1
1.1
.6
1.2
1.3
.7
1.4
1.5
.8
1.6
1.7
.9
1.8
1.9
1.0
2
.3
2.4
0.6
2.8
0.7
.43.2
0.8
0.93.6
.5
.6 4.8 1.35.2
1 4.0 1.14.4 1.2
.75.6
1.4
6.0
1.5
.8
6.4
1.6
Frequency (normalized to Fs)
Frequency (normalized to Fs)
Figure 21. 8x Interpolator Stop Band
Figure 22. 8x Interpolator Transition Band
0
0.1
-1
0.08
-2
0.06
-3
0.04
Amplitude dB
Amplitude dB
0.62
0.02
Frequency (normalized to Fs)
-4
-5
-6
-7
0.02
0
-0.02
-0.04
-8
-0.06
-9
-0.08
-10
-0.1
2.25
0.5
.3
2.4
0.6
3.5
0.72.8
4.03.2
0.8
4.5
3.6
0.9
5.0
14.0
5.5
4.4
1.1
Frequency (normalized to Fs)
Figure 23. 8x Interpolator Transition Band
30
0.6
Figure 18. Quad-speed Transition Band
Amplitude dB
Amplitude dB
Figure 17. Quad-speed Stopband Rejection
-10
0.35
0.58
Frequency (normalized to Fs)
6.0
4.8
1.2
0
0
.05
0.1
.1
0.2
1.5
0.3
.2
0.4
.25
0.5
.3
0.6
Frequency (normalized to Fs)
Figure 24. 8x Interpolator Frequency Response
DS333PP1
0
0
-10
-10
-20
-20
-30
-30
Amplitude dB
Amplitude dB
CS4397
-40
-50
-60
-70
-80
-40
-50
-60
-70
-80
-90
-90
-100
-100
0
1
2
3
4
5
6
7
8
9
10
2.5
Frequency (normalized to Fs)
3
3.5
4
4.5
5
5.5
6
Frequency (normalized to Fs)
Figure 25. DSD Frequency Response
Figure 26. DSD Transition Band
Gain
dB
0
-1
Amplitude dB
-2
T1=50 µs
-3
0dB
-4
-5
-6
T2 = 15 µs
-7
-8
-10dB
-9
-10
0
0.5
1
1.5
2
2.5
3
Frequency (normalized to Fs)
Figure 27. DSD Transition Band
DS333PP1
3.5
4
F1
3.183 kHz
F2
Frequency
10.61 kHz
Figure 28. De-Emphasis Curve
31
CS4397
Left Channel
LRCK
Right Channel
SCLK
SDATA
MSB -1 -2 -3 -4 -5
+5 +4 +3 +2 +1 LSB
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4
Figure 29. Format 0, Left Justified
Left Channel
LRCK
Right Channel
SCLK
SDATA
MSB -1 -2 -3 -4 -5
+5 +4 +3 +2 +1 LSB
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4
Figure 30. Format 1, I2S
LRCK
Right Channel
Left Channel
SCLK
SDATA
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
32 clocks
Figure 31. Format 2, Right Justified, 16-Bit Data
LRCK
Right Channel
Left Channel
SCLK
SDATA
0
23 22 21 20 19 18
32 clocks
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
23 22 21 20 19 18
Figure 32. Format 3, Right Justified, 24-Bit Data
WCKI
BCKI
DIL/DIR
LSB
MSB 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1 LSB
Figure 33. Format 4, 8x Interpolator Mode
32
DS333PP1
CS4397
9.0 PARAMETER DEFINITIONS
Total Harmonic Distortion + Noise (THD+N)
The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified
bandwidth (typically 10Hz to 20kHz), including distortion components. Expressed in decibels.
Dynamic Range
The ratio of the full scale rms value of the signal to the rms sum of all other spectral components over the
specified bandwidth. Dynamic range is a signal-to-noise measurement over the specified bandwidth
made with a -60 dBFS signal. 60 dB is then added to the resulting measurement to refer the measurement
to full scale. This technique ensures that the distortion components are below the noise level and do not
effect the measurement. This measurement technique has been accepted by the Audio Engineering Society, AES17-1991, and the Electronic Industries Association of Japan, EIAJ CP-307.
Interchannel Isolation
A measure of crosstalk between the left and right channels. Measured for each channel at the converter’s
output with all zeros to the input under test and a full-scale signal applied to the other channel. Units in
decibels.
Interchannel Gain Mismatch
The gain difference between left and right channels. Units in decibels.
Gain Error
The deviation from the nominal full scale analog output for a full scale digital input.
Gain Drift
The change in gain value with temperature. Units in ppm/°C.
10.0 REFERENCES
1) "How to Achieve Optimum Performance from Delta-Sigma A/D & D/A Converters" by Steven Harris.
Paper presented at the 93rd Convention of the Audio Engineering Society, October 1992.
2) CDB4397 Evaluation Board Datasheet
3) “The I2C-Bus Specification: Version 2.0” Philips Semiconductors, December 1998.
http://www.semiconductors.philips.com
DS333PP1
33
CS4397
11.0 PACKAGE DIMENSIONS
28L SOIC (300 MIL BODY) PACKAGE DRAWING
E
H
1
b
c
∝
D
L
SEATING
PLANE
A
e
A1
DIM
A
A1
B
C
D
E
e
H
L
∝
INCHES
MIN
0.093
0.004
0.013
0.009
0.697
0.29G10
1
0.040
0.394
0.016
0°
MAX
0.104
0.012
0.020
0.013
0.713
0.299
MILLIMETERS
MIN
MAX
2.35
2.65
0.10
0.30
0.33
0.51
0.23
0.32
17.70
18.10
7.40
7.60
0.060
0.419
0.050
8°
1.02
10.00
0.40
0°
1.52
10.65
1.27
8°
JEDEC #: MS-013
34
DS333PP1
• Notes •