CS5342
105 dB, 192 kHz, Multi-bit Audio A/D Converter
Features
General Description
The CS5342 is a complete analog-to-digital converter for
digital audio systems. It performs sampling, analog-todigital conversion and anti-alias filtering, generating
24-bit values for both left and right inputs in serial form at
sample rates up to 200 kHz per channel.
Advanced Multi-bit Delta-Sigma Architecture
24-bit Conversion
Supports all audio sample rates including
192 kHz.
105 dB Dynamic Range at 5 V
The CS5342 uses a 5th-order, multi-bit Delta-Sigma
modulator followed by digital filtering and decimation,
which removes the need for an external anti-alias filter.
-98 dB THD+N
High-pass Filter to Remove DC Offsets
Low-latency Digital Filter
The CS5342 is ideal for audio systems requiring wide dynamic range, negligible distortion and low noise, such as
set-top boxes, DVD-karaoke players, DVD recorders,
A/V receivers, and automotive applications.
Automatic Mode Selection
ORDERING INFORMATION
Analog/Digital Core Supplies From 3.3 V to 5 V
Supports logic levels between 2.5 V and 5 V.
CS5342-CZZ Lead-free
CS5342-DZZ Lead-free
CDB5342
Supports 384x MCLK/LRCK Ratios.
VQ
FILT+
VL
2.5V - 5.0V SCLK LRCK SDOUT
REFGND
-10° to 70° C
-40° to 85° C
MCLK
RST
Serial Output Interface
Voltage Reference
16-pin TSSOP
16-pin TSSOP
Evaluation Board
M0
M1
+
AINL
LP Filter
Q
S/H
Digital
Decimation
Filter
High
Pass
Filter
Digital
Decimation
Filter
High
Pass
Filter
DAC
+
AINR
LP Filter
Q
S/H
DAC
VA
3.3V - 5.0V
GND
VD
3.3V - 5.0V
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
www.cirrus.com
Copyright © Cirrus Logic, Inc. 2004
(All Rights Reserved)
AUG ‘04
DS608PP2
CS5342
TABLE OF CONTENTS
1 CHARACTERISTICS AND SPECIFICATIONS ......................................................................... 4
SPECIFIED OPERATING CONDITIONS ................................................................................. 4
ABSOLUTE MAXIMUM RATINGS ........................................................................................... 4
ANALOG CHARACTERISTICS (CS5342-CZZ) ....................................................................... 5
DIGITAL FILTER CHARACTERISTICS.................................................................................... 7
DC ELECTRICAL CHARACTERISTICS................................................................................. 10
DIGITAL CHARACTERISTICS ............................................................................................... 10
THERMAL CHARACTERISTICS............................................................................................ 10
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT ................................................. 11
2 PIN DESCRIPTION ................................................................................................................. 13
3 TYPICAL CONNECTION DIAGRAM ....................................................................................... 14
4 APPLICATIONS ....................................................................................................................... 15
4.1 Single, Double, and Quad Speed Modes ......................................................................... 15
4.2 Operation as Either a Clock Master or Slave ................................................................... 15
4.2.1 Operation as a Clock Master ............................................................................... 16
4.2.2 Operation as a Clock Slave ................................................................................. 16
4.2.3 Master Clock ....................................................................................................... 17
4.3 Serial Audio Interface ....................................................................................................... 17
4.4 Power-up Sequence ........................................................................................................ 18
4.5 Analog Connections ......................................................................................................... 18
4.6 Grounding and Power Supply Decoupling ....................................................................... 18
4.7 Synchronization of Multiple Devices ................................................................................ 19
4.8 Capacitor Size on the Reference Pin (FILT+) .................................................................. 19
5 PARAMETER DEFINITIONS ................................................................................................... 20
6 PACKAGE DIMENSIONS ....................................................................................................... 21
7. REVISION HISTORY .............................................................................................................. 22
Contacting Cirrus Logic Support
For all product questions and inquiries contact a Cirrus Logic Sales Representative.
To find one nearest you go to www.cirrus.com/
IMPORTANT NOTICE
LEGAL NOTICE
"Preliminary" product information describes products that are in production, but for which full characterization data is not yet available. 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, patent infringement, 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 AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, LIFE
SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS (INCLUDING MEDICAL DEVICES, AIRCRAFT SYSTEMS OR COMPONENTS AND
PERSONAL OR AUTOMOTIVE SAFETY OR SECURITY DEVICES). 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.
2
DS608PP2
CS5342
LIST OF FIGURES
Figure 1. Single Speed Stopband Rejection .................................................................................. 8
Figure 2. Single Speed Stopband Rejection (detail) ...................................................................... 8
Figure 3. Single Speed Transition Band (detail) ............................................................................ 8
Figure 4. Single Speed Passband Ripple ...................................................................................... 8
Figure 5. Double Speed Stopband Rejection ................................................................................. 8
Figure 6. Double Speed Stopband Rejection (detail) ..................................................................... 8
Figure 7. Double Speed Transition Band (detail) ........................................................................... 9
Figure 8. Double Speed Passband Ripple ..................................................................................... 9
Figure 9. Quad Speed Stopband Rejection ................................................................................... 9
Figure 10. Quad Speed Stopband Rejection (detail) ..................................................................... 9
Figure 11. Quad Speed Transition Band (detail) ............................................................................ 9
Figure 12. Quad Speed Passband Ripple ...................................................................................... 9
Figure 13. Master Mode, Left Justified SAI .................................................................................. 12
Figure 14. Slave Mode, Left Justified SAI .................................................................................... 12
Figure 15. Master Mode, I2S SAI ................................................................................................. 12
Figure 16. Slave Mode, I2S SAI ................................................................................................... 12
Figure 17. Typical Connection Diagram ....................................................................................... 14
Figure 18. CS5342 Master Mode Clocking .................................................................................. 16
Figure 19. Left-Justified Serial Audio Interface ............................................................................ 17
Figure 20. I2S Serial Audio Interface ............................................................................................ 17
Figure 21. CS5342 Recommended Analog Input Buffer .............................................................. 18
Figure 22. CS5342 THD+N versus Frequency ............................................................................ 19
LIST OF TABLES
Table 1. Speed Modes and the Associated Output Sample Rates (Fs)........................................ 15
Table 2. CS5342 Mode Control..................................................................................................... 15
Table 3. Master Clock (MCLK) Ratios........................................................................................... 17
Table 4. Master Clock (MCLK) Frequencies for Standard Audio Sample Rates .......................... 17
Table 5. Revision History .............................................................................................................. 22
DS608PP2
3
CS5342
1
CHARACTERISTICS AND SPECIFICATIONS
(All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical
performance characteristics and specifications are derived from measurements taken at typical supply voltages
and TA = 25°C.)
SPECIFIED OPERATING CONDITIONS
(GND = 0 V, all voltages with respect to 0 V.)
Parameter
Symbol
Min
Typ
Max
Unit
Analog
Digital
Logic
VA
VD
VL
3.14
3.14
2.38
(Note 1)
3.3
3.3
5.25
5.25
5.25
V
V
V
Commercial (-CZZ)
TAC
-10
-
70
°C
Power Supplies (Notes 2, 3)
Ambient Operating Temperature
Notes: 1. This part is specified at typical analog voltages of 3.3 V and 5.0 V. See Analog Characteristics (CS5342CZZ) below for details.
2. In Quad-Speed Slave Mode, the CS5342 is only specified for operation with VA and VD at 5 V, ±5%.
ABSOLUTE MAXIMUM RATINGS
(GND = 0 V, All voltages with respect to ground.) (Note 3)
Parameter
Symbol
Min
Max
Units
Analog
Logic
Digital
VA
VL
VD
-0.3
-0.3
-0.3
+6.0
+6.0
+6.0
V
V
V
Input Current
(Note 4)
Iin
-
±10
mA
Analog Input Voltage
(Note 5)
VIN
GND-0.7
VA+0.7
V
Digital Input Voltage
(Note 5)
DC Power Supplies:
VIND
-0.7
VL+0.7
V
Ambient Operating Temperature (Power Applied)
TA
-50
+95
°C
Storage Temperature
Tstg
-65
+150
°C
Notes: 3. Operation beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
4. Any pin except supplies. Transient currents of up to ±100 mA on the analog input pins will not cause SRC
latch-up.
5. The maximum over/under voltage is limited by the input current.
4
DS608PP2
CS5342
ANALOG CHARACTERISTICS (CS5342-CZZ) Test conditions (unless otherwise specified):
Input test signal is a 1 kHz sine wave; measurement bandwidth is 10 Hz to 20 kHz.
Parameter
VA = 3.3 V
Single Speed Mode
Fs = 48 kHz
Dynamic Range
A-weighted
unweighted
Total Harmonic Distortion + Noise
(Note 6)
-1 dB
-20 dB
-60 dB
Double Speed Mode
Fs = 96 kHz
Dynamic Range
A-weighted
unweighted
40 kHz bandwidth unweighted
Total Harmonic Distortion + Noise
(Note 6)
-1 dB
-20 dB
-60 dB
40 kHz bandwidth
-1 dB
Quad Speed Mode (Note 2)
Fs = 192 kHz
Dynamic Range
A-weighted
unweighted
40 kHz bandwidth unweighted
Total Harmonic Distortion + Noise
(Note 6)
-1 dB
-20 dB
-60 dB
40 kHz bandwidth
-1 dB
VA = 5.0 V
Single Speed Mode
Fs = 48 kHz
Dynamic Range
A-weighted
unweighted
Total Harmonic Distortion + Noise
(Note 6)
-1 dB
-20 dB
-60 dB
Double Speed Mode
Fs = 96 kHz
Dynamic Range
A-weighted
unweighted
40 kHz bandwidth unweighted
Total Harmonic Distortion + Noise
40 kHz bandwidth
DS608PP2
(Note 6)
-1 dB
-20 dB
-60 dB
-1 dB
Symbol
Min
Typ
Max
Unit
96
93
102
99
-
dB
dB
-
-95
-79
-39
-89
-
dB
dB
dB
96
93
-
102
99
96
-
dB
dB
dB
-
-95
-79
-39
-87
-89
-
dB
dB
dB
dB
96
93
-
102
99
96
-
dB
dB
dB
-
-95
-79
-39
-87
-89
-
dB
dB
dB
dB
99
96
105
102
-
dB
dB
-
-98
-82
-42
-92
-
dB
dB
dB
99
96
-
105
102
99
-
dB
dB
dB
-
-98
-82
-42
-95
-92
-
dB
dB
dB
dB
THD+N
THD+N
THD+N
THD+N
THD+N
5
CS5342
Quad Speed Mode (Note 2)
Dynamic Range
Fs = 192 kHz
A-weighted
unweighted
40 kHz bandwidth unweighted
Total Harmonic Distortion + Noise
(Note 6)
-1 dB
-20 dB
-60 dB
40 kHz bandwidth
-1 dB
Dynamic Performance for All Modes
Interchannel Isolation
DC Accuracy
Interchannel Gain Mismatch
Gain Error
Input Impedance
6
105
102
99
-
dB
dB
dB
-
-98
-82
-42
-95
-92
-
dB
dB
dB
dB
-
90
-
dB
-3
0.1
-
-
dB
%
-
THD+N
Gain Drift
Analog Input Characteristics
Full-scale Input Voltage
Note:
99
96
-
±100
3
-
ppm/°C
0.54*VA
0.56*VA
0.58*VA
Vpp
18
-
-
kΩ
6. Referred to the typical full-scale input voltage
DS608PP2
CS5342
DIGITAL FILTER CHARACTERISTICS
Parameter (Note 7)
Symbol
Min
Typ
Max
Unit
0
-
0.4896
Fs
-0.1
-
0.035
dB
0.5688
-
-
Fs
Single Speed Mode
Passband
(-0.1 dB)
Passband Ripple
Stopband
Stopband Attenuation
Total Group Delay (Fs = Output Sample Rate)
tgd
70
-
-
dB
-
12/Fs
-
s
0
-
0.4896
Fs
Double Speed Mode
Passband
(-0.1 dB)
Passband Ripple
Stopband
Stopband Attenuation
Total Group Delay (Fs = Output Sample Rate)
tgd
-0.1
-
0.058
dB
0.5604
-
-
Fs
69
-
-
dB
-
9/Fs
-
s
0
-
0.2604
Fs
-0.1
-
0.058
dB
0.5000
-
-
Fs
Quad Speed Mode (Note 2)
Passband
(-0.1 dB)
Passband Ripple
Stopband
Stopband Attenuation
Total Group Delay (Fs = Output Sample Rate)
tgd
60
-
-
dB
-
5/Fs
-
s
-
1
20
-
Hz
Hz
-
10
-
Deg
-
-
0
dB
High Pass Filter Characteristics
Frequency Response
Phase Deviation
Passband Ripple
Filter Settling Time
Note:
-3.0 dB
-0.13 dB
(Note 7)
@ 20 Hz
(Note 7)
105/Fs
s
7. Response is clock dependent and will scale with Fs. Note that the response plots (Figures 1 to 12) are
normalized to Fs and can be de-normalized by multiplying the X-axis scale by Fs.
DS608PP2
7
0
0
-10
-2 0
-10
-2 0
-3 0
-4 0
-3 0
-4 0
Amplitude (dB)
Amplitude (dB)
CS5342
- 50
-6 0
- 70
-8 0
-9 0
- 10 0
- 110
- 12 0
- 13 0
- 50
-6 0
- 70
-8 0
-9 0
- 10 0
- 110
- 12 0
- 13 0
- 14 0
0 .0
0 .1
0 .2
0 .3
0 .4
0 .5
0 .6
0 .7
0 .8
0 .9
- 14 0
0 .4 0
1.0
0 .4 2
Fr e qu e n cy (no r m aliz e d to Fs )
0 .10
0 .0 8
-2
0 .0 6
Amplitude (dB)
Amplitude (dB)
0
-3
-4
-5
-6
0 .52
0 .54
0 .56
0 .58
0 .6 0
-7
0 .0 2
0 .0 0
-0 .0 2
-0 .0 4
-8
-0 .0 6
-9
-0 .0 8
-0 .10
0 .4 6
0 .4 7
0 .4 8
0 .4 9
0 .5
0 .51
0 .52
0 .53
0 .54
0
0 .55
0 .0 5
0 .2
0 .3
0 .4
0 .5
0 .6
0 .7
0 .8
0 .15
0 .2
0 .2 5
0 .3
0 .3 5
0 .4
0 .4 5
0 .5
Figure 4. Single Speed Passband Ripple
Amplitude (dB)
0
-10
-2 0
-3 0
-4 0
-50
-6 0
-70
-8 0
-9 0
-10 0
-110
-12 0
-13 0
-14 0
0 .1
0 .1
Fr e qu e n cy (n or m aliz e d to Fs )
Figure 3. Single Speed Transition Band (detail)
Amplitude (dB)
0 .50
0 .0 4
Fr e qu e n cy (n or m aliz e d to Fs )
0 .9
1.0
Fr e qu e n cy (no r m aliz e d to Fs )
Figure 5. Double Speed Stopband Rejection
8
0 .4 8
Figure 2. Single Speed Stopband Rejection (detail)
-1
0 .0
0 .4 6
Fr e q ue n cy (no r m aliz e d to Fs )
Figure 1. Single Speed Stopband Rejection
-10
0 .4 5
0 .4 4
0
-10
-2 0
-3 0
-4 0
-50
-6 0
-70
-8 0
-9 0
-10 0
-110
-12 0
-13 0
-14 0
0 .4 0
0 .4 2
0 .4 4
0 .4 6
0 .4 8
0 .50
0 .52
0 .54
0 .56
0 .58
0 .6 0
Fr e q ue n cy (no r m aliz e d to Fs )
Figure 6. Double Speed Stopband Rejection (detail)
DS608PP2
0
0 .10
-1
0 .0 8
-2
0 .0 6
Amplitude (dB)
Amplitude (dB)
CS5342
-3
-4
-5
-6
-7
0 .0 4
0 .0 2
0 .0 0
-0 .0 2
-0 .0 4
-8
-0 .0 6
-9
-0 .0 8
-10
0 .4 6
0 .4 7
0 .4 8
0 .4 9
0 .50
0 .51
-0 .10
0 .0 0
0 .52
Fr e qu e n cy (n or m aliz e d to Fs )
0 .2
0 .3
0 .4
0 .5
0 .6
0 .7
0 .8
0 .15
0 .2 0
0 .2 5
0 .3 0
0 .3 5 0 .4 0
0 .4 5
0 .50
Figure 8. Double Speed Passband Ripple
Amplitude (dB)
Amplitude (dB)
0
-10
-2 0
-3 0
-4 0
-50
-6 0
-70
-8 0
-9 0
-10 0
-110
-12 0
-13 0
-14 0
0 .1
0 .10
Fr e qu e n cy (n or m aliz e d to Fs )
Figure 7. Double Speed Transition Band (detail)
0 .0
0 .0 5
0 .9
0
-10
-2 0
-3 0
-4 0
-50
-6 0
-70
-8 0
-9 0
-10 0
-110
-12 0
-13 0
-14 0
1.0
0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85
Fr e qu e n cy (no r m aliz e d to Fs )
Fr e qu e n cy (no r m aliz e d to Fs )
Figure 9. Quad Speed Stopband Rejection
Figure 10. Quad Speed Stopband Rejection (detail)
0 .10
-2
0 .0 8
-3
0 .0 6
Amplitude (dB)
Amplitude (dB)
0
-1
-4
-5
-6
-7
-8
-9
-10
0 .10
0 .0 2
0 .0 0
-0 .0 2
-0 .0 4
-0 .0 6
-0 .0 8
0 .15
0 .2 0
0 .2 5
0 .3 0
0 .3 5
0 .4 0
0 .4 5
0 .50
Fr e qu e n cy (n or m aliz e d to Fs )
Figure 11. Quad Speed Transition Band (detail)
DS608PP2
0 .0 4
-0 .10
0 .0 0 0 .0 3 0 .0 5 0 .0 8 0 .10
0 .13
0 .15 0 .18 0 .2 0 0 .2 3 0 .2 5 0 .2 8
Fr e qu e ncy (n or m aliz e d to Fs )
Figure 12. Quad Speed Passband Ripple
9
CS5342
DC ELECTRICAL CHARACTERISTICS (GND = 0 V, all voltages with respect to 0 V.
MCLK=18.432 MHz; Master Mode; refer to Note 2)
Parameter
Symbol
Min
Typ
Max
Unit
Positive Analog
Positive Digital
Positive Logic
VA
VD
VL
3.14
3.14
2.38
-
5.25
5.25
5.25
V
V
V
VA = 5 V
VA = 3.3 V
VL,VD = 5 V
VL,VD = 3.3 V
IA
IA
ID
ID
-
21
18.2
15
9
23.1
20
16.5
10
mA
mA
mA
mA
VA = 5 V
VL,VD=5 V
IA
ID
-
1.5
0.4
-
mA
mA
VL, VD, VA = 5 V
VL, VD, VA = 3.3 V
(Power-Down Mode)
-
-
180
90
9.5
198
100
-
mW
mW
mW
PSRR
-
65
-
dB
VQ Nominal Voltage
Output Impedance
-
VA÷2
25
-
kΩ
Filt+ Nominal Voltage
Output Impedance
Maximum allowable DC current source/sink
-
VA
36
0.01
-
DC Power Supplies:
Power Supply Current
(Normal Operation)
Power Supply Current
(Power-down Mode) (Note 8)
Power Consumption
(Normal Operation)
Power Supply Rejection Ratio
(1 kHz)
(Note 9)
V
V
kΩ
mA
Notes: 8. Power-down Mode is defined as RST = Low with all clocks and data lines held static.
9. Valid with the recommended capacitor values on FILT+ and VQ as shown in the “Typical Connection
Diagram”.
DIGITAL CHARACTERISTICS
Parameter
Symbol
Min
Typ
Max
Units
High-level Input Voltage
(% of VL)
VIH
70%
-
-
V
Low-level Input Voltage
(% of VL)
VIL
-
-
30%
V
High-level Output Voltage at Io = 100 µA
(% of VL)
VOH
70%
-
-
V
Low-level Output Voltage at Io =100 µA
(% of VL)
VOL
-
-
15%
V
Iin
-
-
±10
µA
Typ
Max
Unit
-
-
135
°C
-
75
-
°C/W
Input Leakage Current
THERMAL CHARACTERISTICS
Parameter
Symbol
Allowable Junction Temperature
Junction-to-ambient Thermal Impedance
10
θJA
Min
DS608PP2
CS5342
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT (Logic "0" = GND = 0 V;
Logic "1" = VL, C L = 20 pF)
Parameter
Symbol
Min
Typ
Max
Unit
tclkw
26
-
31
ns
MCLK Specifications
MCLK Period
52
-
1303
ns
40
-
60
%
tmslr
-20
-
20
ns
tsdo
-
-
32
ns
-
50
50
33
-
%
%
%
MCLK Pulse Duty Cycle
Master Mode
SCLK falling to LRCK
SCLK falling to SDOUT valid
SCLK Duty Cycle
Single-Speed
Double-Speed
Quad-Speed
Slave Mode
Single Speed*
LRCK Duty Cycle
SCLK Period
tsclkw
SCLK Duty Cycle
SDOUT valid before SCLK rising
tstp
40
-
60
%
290
-
-
ns
45
-
55
%
10
-
-
ns
SDOUT valid after SCLK rising
thld
5
-
-
ns
SCLK falling to LRCK edge
tslrd
-20
-
20
ns
40
-
60
%
193
-
-
ns
45
-
55
%
Double Speed*
LRCK Duty Cycle
SCLK Period (Note 9)
tsclkw
SCLK Duty Cycle
SDOUT valid before SCLK rising
tstp
10
-
-
ns
SDOUT valid after SCLK rising
thld
5
-
-
ns
SCLK falling to LRCK edge
tslrd
-20
-
20
ns
40
-
60
%
tsclkw
104
-
-
ns
40
-
50
%
SDOUT valid before SCLK rising
tstp
10
-
-
ns
SDOUT valid after SCLK rising
thld
5
-
-
ns
SCLK falling to LRCK edge
tslrd
-8
-
8
ns
Quad Speed* (Note 2)
LRCK Duty Cycle
SCLK Period (Note 9)
SCLK Duty Cycle
* For a description of Speed Modes, please refer to Table 1 on page 15
Notes: 9. SCLK must be derived synchronously from MCLK and the ratio of SCLK/LRCK must be equal to 48.
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11
CS5342
LRCK output
LRCK input
t sclkw
t slrd
tmslr
SCLK input
SCLK output
t stp thld
tsdo
SDOUT
MSB-1
MSB
Figure 13. Master Mode, Left Justified SAI
SDOUT
MSB
MSB-1
Figure 14. Slave Mode, Left Justified SAI
LRCK input
LRCK output
t slrd
tmslr
tsclkw
SCLK input
SCLK output
t stp thld
t sdo
SDOUT
MSB
Figure 15. Master Mode, I2S SAI
12
MSB-1
SDOUT
MSB
Figure 16. Slave Mode, I2S SAI
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CS5342
2
PIN DESCRIPTION
M0
MCLK
VL
SDOUT
GND
VD
SCLK
LRCK
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
M1
FILT+
REFGND
VA
AINR
VQ
AINL
RST
Pin Name
#
Pin Description
M0
M1
1
16
Mode Selection (Input) - Determines the operational mode of the device.
MCLK
2
Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
VL
3
Logic Power (Input) - Positive power for the digital input/output.
SDOUT
4
Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
GND
5
Ground (Input) - Ground reference. Must be connected to analog ground.
VD
6
Digital Power (Input) - Positive power supply for the digital section.
SCLK
7
Serial Clock (Input/Output) - Serial clock for the serial audio interface.
LRCK
8
Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently
active on the serial audio data line.
RST
9
Reset (Input) - The device enters a low power mode when low.
AINL
AINR
10
12
Analog Input (Input) - The full scale analog input level is specified in the Analog Characteristics specification table.
VQ
11
Quiescent Voltage (Output) - Filter connection for the internal quiescent
reference voltage.
VA
13
Analog Power (Input) - Positive power supply for the analog section.
REFGND
14
Reference Ground (Output) - Ground reference for the internal sampling circuits.
FILT+
15
Positive Voltage Reference (Output) - Positive reference voltage for the internal
sampling circuits.
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13
CS5342
3
TYPICAL CONNECTION DIAGRAM
4
3.3V to 5V
+
1 µF
0.1 µF
+
0.1 µF
2.5V to 5V
1 µF
2
4
3.3V to 5V
+
1 µF
0.1 µF
5.1Ω
VA
0.1 µF
VL
VD
FILT+
3
1 µF
+
0.1 µF
REFGND
+
1 µF
0.1 µF
VQ
CS5342
RST
M0
M1
Power Down
and Mode
Settings
1
VL or GND
A/D CONVERTER
10 kΩ
A INL
Audio Data
Processor
SDOUT
Analog Input Buffer
Figure 15
AI NR
MCLK
Timing Logic
and Clock
LRCK
SCLK
1
Pull-up to VL for I2S
Pull-down to GND for LJ
GND
2
Resistor may only be
used if VD is derived from
VA. If used, do not drive any
other logic from VD
3
Capacitor value affects
low frequency distortion
performance as described
in Section 4.8
4
See Note 2 on page 4
Figure 17. Typical Connection Diagram
14
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CS5342
4 APPLICATIONS
4.1
Single, Double, and Quad Speed Modes
The CS5342 can support output sample rates from 2 kHz to 200 kHz. The proper speed mode can be determined
by the desired output sample rate and the external MCLK/LRCK ratio, as shown in Table 1.
Speed Mode
Single Speed Mode
Double Speed Mode
Quad Speed Mode
MCLK/LRCK
Ratio
Output Sample Rate Range (kHz)
768x
43 - 54
384x
2 - 54
384x
86 - 108
192x
50 - 108
192x
172 - 200
96x*
100 - 200
* Quad Speed Mode, 96x only available in Master Mode.
Table 1. Speed Modes and the Associated Output Sample Rates (Fs)
4.2
Operation as Either a Clock Master or Slave
The CS5342 supports operation as either a clock master or slave. As a clock master, the LRCK and SCLK pins are
outputs with the left/right and serial clocks synchronously generated on-chip. As a clock slave, the LRCK and SCLK
pins are inputs and require the left/right and serial clocks to be externally generated. The selection of clock master
or slave is made via the Mode pins as shown in Table 2.
M1 (Pin 16)
0
0
1
1
M0 (Pin 1)
0
1
0
1
Clock
Clock
Clock
Clock
MODE
Master, Single Speed Mode
Master, Double Speed Mode
Master, Quad Speed Mode
Slave, All Speed Modes
Table 2. CS5342 Mode Control
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15
CS5342
4.2.1
Operation as a Clock Master
As a clock master, LRCK and SCLK operate as outputs. The left/right and serial clocks are internally derived from
the master clock with the left/right clock equal to Fs and the serial clock equal to 64x Fs, as shown in Figure 18.
÷ 1.5
÷ 256
Single
Speed
00
÷ 128
Double
Speed
01
÷ 64
Quad
Speed
10
LRCK Output
(Equal to Fs)
0
MCLK
M[1:0]
÷3
1
Auto-Select
÷4
Single
Speed
00
÷2
Double
Speed
01
÷1
Quad
Speed
10
SCLK Output
Figure 18. CS5342 Master Mode Clocking
4.2.2
Operation as a Clock Slave
LRCK and SCLK operate as inputs in clock slave mode. It is recommended that the left/right clock be
synchronously derived from the master clock and must be equal to Fs. It is also recommended that the serial clock
be synchronously derived from the master clock and equal to 48x Fs or 64x Fs in Single-Speed Mode. In DoubleSpeed and Quad-Speed Modes the serial clock must be derived synchronously from the master clock and equal to
48x Fs. Additionally, Quad-Speed Slave Mode is only specified for operation with a VA and VD at 5 V, ±5%.
A unique feature of the CS5342 is the automatic selection of either Single, Double or Quad speed mode when operating as a clock slave. The auto-mode select feature negates the need to configure the Mode pins to correspond
to the desired mode. The auto-mode selection feature supports all standard audio sample rates from 2 to 200 kHz.
However, there are ranges of non-standard audio sample rates that are not supported when operating with a fast
MCLK (768x, 384x, and 192x for Single, Double, and Quad Speed Modes respectively). Please refer to Table 1 on
page 15 for supported sample rate ranges.
16
DS608PP2
CS5342
4.2.3
Master Clock
The CS5342 requires a Master clock (MCLK) which runs the internal sampling circuits and digital filters. There is also
an internal MCLK divider which is automatically activated based on the frequency of the MCLK. Table 3 shows a listing of the external MCLK/LRCK ratios that are required. Table 4 lists some common audio output sample rates and
the required MCLK frequency. Please note that not all of the listed sample rates are supported when operating with
a fast MCLK (768x, 384x, 192x for Single, Double, and Quad Speed Modes respectively).
Single Speed Mode
Double Speed Mode
Quad Speed Mode
384x, 768x
192x, 384x
96x*, 192x
MCLK/LRCK Ratio
* Quad Speed, 96x only available in Master Mode.
Table 3. Master Clock (MCLK) Ratios
SAMPLE RATE (kHz)
32
44.1
MCLK (MHz)
12.288
16.9344
33.8688
18.432
36.864
12.288
16.9344
33.8688
18.432
36.864
36.864
48
64
88.2
96
192
Table 4. Master Clock (MCLK) Frequencies for Standard Audio Sample Rates
4.3
Serial Audio Interface
The CS5342 supports both I2S and Left Justified serial audio formats. Upon start-up, the CS5342 will detect the logic
level on SDOUT (pin 4). A 10 kΩ pull-up resistor to VL is needed to select I2S format, and a 10 kΩ pull-down resistor
to GND is needed to select Left Justified format. Please see Figures 13 through 16 on page 12, for more information
on the required timing for the two serial audio interface formats.
LRCK
Left Channel
Right Channel
SCLK
SDATA
23 22
9
8
7
6
5
4
3
2 1
0
23 22
9
8
7
6
5
4
3
2
1
0
23 22
0
23 22
Figure 19. Left-Justified Serial Audio Interface
LRCK
Left Channel
Right Channel
SCLK
SDATA
23 22
9
8
7
6
5
4
3
2
1
0
23 22
9
8
7
6
5
4
3
2
1
Figure 20. I2S Serial Audio Interface
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CS5342
4.4
Power-up Sequence
Reliable power-up can be accomplished by keeping the device in reset until the power supplies, clocks and configuration pins are stable. It is also recommended that reset be enabled if the analog or digital supplies drop below the
minimum specified operating voltages to prevent power glitch related issues.
4.5
Analog Connections
The analog modulator samples the input at 6.144 MHz. The digital filter will reject signals within the stopband of the
filter. However, there is no rejection for input signals which are multiples of the input sampling frequency
(n × 6.144 MHz), where n=0,1,2,... Refer to Figure 15 which shows the suggested filter that will attenuate any noise
energy at 6.144 MHz, in addition to providing the optimum source impedance for the modulators. The use of capacitors which have a large voltage coefficient (such as general purpose ceramics) must be avoided since these can
degrade signal linearity.
634 Ω
VA
470 pF
COG
100 kΩ
4.7 uF
91 Ω
CS5342 AINL
AINL
100 kΩ
2200 pF
VA
4.7 uF
100 kΩ
91 Ω
AINL
CS5342 AINL
100 kΩ
COG
470 pF
2200 pF
634 Ω
Figure 21. CS5342 Recommended Analog Input Buffer
4.6
Grounding and Power Supply Decoupling
As with any high resolution converter, the CS5342 requires careful attention to power supply and grounding arrangements if its potential performance is to be realized. Figure 17 shows the recommended power arrangements, with
VA and VL connected to clean supplies. VD, which powers the digital filter, may be run from the system logic supply
or may be powered from the analog supply via a resistor. In this case, no additional devices should be powered from
VD. Decoupling capacitors should be as near to the ADC as possible, with the low value ceramic capacitor being
the nearest. All signals, especially clocks, should be kept away from the FILT+ and VQ pins in order to avoid unwanted coupling into the modulators. The FILT+ and VQ decoupling capacitors, particularly the 0.1 µF, must be positioned to minimize the electrical path from FILT+ and REF_GND. The CDB5342 evaluation board demonstrates
the optimum layout and power supply arrangements. To minimize digital noise, connect the ADC digital outputs only
to CMOS inputs.
18
DS608PP2
CS5342
4.7
Synchronization of Multiple Devices
In systems where multiple ADCs are required, care must be taken to achieve simultaneous sampling. To ensure
synchronous sampling, the MCLK and LRCK must be the same for all of the CS5342’s in the system.
4.8
Capacitor Size on the Reference Pin (FILT+)
The CS5342 requires an external capacitance on the internal reference voltage pin, FILT+. The size of this decoupling capacitor will affect the low frequency distortion performance as shown in Figure 22, with larger capacitor values used to optimize low frequency distortion performance. The THD+N curves in Figure 22 were measured with
VA = VD = VL = 5 V in Single-Speed Master Mode using a 1 kHz input tone of magnitude -1 dB Full-Scale.
1 uF
2.2 uF
3.3 uF
4.7 uF
5.6 uF
6.8 uF
10 uF
22 uF
47 uF
100 uF
Figure 22. CS5342 THD+N versus Frequency
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CS5342
5
PARAMETER DEFINITIONS
Dynamic Range
The ratio of the 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 ratio measurement over the specified bandwidth made
with a -60 dBFS signal. 60 dB is added to resulting measurement to refer the measurement to full-scale.
This technique ensures that the distortion components are below the noise level and do not affect 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. Expressed in decibels.
Total Harmonic Distortion + Noise
The ratio of the rms value of the signal to the rms sum of all other spectral components over the specified
bandwidth (typically 10 Hz to 20 kHz), including distortion components. Expressed in decibels. Measured
at -1 and -20 dBFS as suggested in AES17-1991 Annex A.
Frequency Response
A measure of the amplitude response variation from 10 Hz to 20 kHz relative to the amplitude response
at 1 kHz. Units in decibels.
Interchannel Isolation
A measure of crosstalk between the left and right channels. Measured for each channel at the converter's
output with no signal 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 input for a full-scale digital output.
Gain Drift
The change in gain value with temperature. Units in ppm/°C.
Offset Error
The deviation of the mid-scale transition (111...111 to 000...000) from the ideal. Units in mV.
20
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CS5342
6 PACKAGE DIMENSIONS
16L TSSOP (4.4 mm BODY) PACKAGE DRAWING
N
D
E11
A2
E
A
∝
e
b2
SIDE VIEW
A1
L
END VIEW
SEATING
PLANE
1 2 3
TOP VIEW
DIM
A
A1
A2
b
D
E
E1
e
L
MIN
-0.002
0.03346
0.00748
0.193
0.248
0.169
-0.020
0°
∝
INCHES
NOM
-0.004
0.0354
0.0096
0.1969
0.2519
0.1732
0.026 BSC
0.024
4°
MAX
0.043
0.006
0.037
0.012
0.201
0.256
0.177
-0.028
8°
MIN
-0.05
0.85
0.19
4.90
6.30
4.30
-0.50
0°
MILLIMETERS
NOM
--0.90
0.245
5.00
6.40
4.40
0.065 BSC
0.60
4°
NOTE
MAX
1.10
0.15
0.95
0.30
5.10
6.50
4.50
-0.70
8°
2,3
1
1
JEDEC #: MO-153
Controlling Dimension is Millimeters
Notes: 1. “D” and “E1” are reference datums and do not included mold flash or protrusions, but do include mold
mismatch and are measured at the parting line, mold flash or protrusions shall not exceed 0.20 mm per
side.
2. Dimension “b” does not include dambar protrusion/intrusion. Allowable dambar protrusion shall be
0.13 mm total in excess of “b” dimension at maximum material condition. Dambar intrusion shall not
reduce dimension “b” by more than 0.07 mm at least material condition.
3. These dimensions apply to the flat section of the lead between 0.10 and 0.25 mm from lead tips.
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21
CS5342
7.
REVISION HISTORY
Release
Date
Changes
A1
April 2003
-Initial Advance Release.
A2
July 2003
-Modify serial port timing specs.
-Add Applications section on speed mode detect.
PP1
August 2004
-Change 2700 pF capacitors to 2200 pF in analog input buffer diagram.
-Update Output Sample Range table.
-Add new Applications section about capacitor on FILT+ pin.
-Correct Max MCLK period under “Switching Characteristics.”
-Replace MCLK low/high timing specifications with duty cycle specification.
-Redefine slave mode timing specifications under “Switching Characteristics.”
-Add requirement of SCLK/LRCK = 48x in Double and Quad Speed Modes.
-Increase minimum VL specification from 1.7 V to 2.38 V.
-Specify VA and VD at 5 V, ±5% for Quad-Speed Slave Mode.
-Reduce gain error specification under Analog Characteristics.
-Improve minimum and maximum specifications for full-scale input voltage.
-Initial Preliminary Release.
PP2
Aug 2004
Update to include lead-free device ordering information.
Table 5. Revision History
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DS608PP2