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CS5343/4
98 dB, 96 kHz, Multi-Bit Audio A/D Converter
Features
Advanced Multi-Bit Architecture 24-bit Conversion Supports Audio Sample Rates Up to 108 kHz 98 dB Dynamic Range at 5 V -92 dB THD+N at 5 V Low-Latency Digital Filter High-Pass Filter to Remove DC Offsets Single +3.3 V or +5 V Power Supply Power Consumption < 40 mW at 3.3 V Master or Slave Operation Slave Mode Speed Auto-Detect Master Mode Default Settings 256x or 384x MCLK/LRCK Ratio CS5343 Supports IS Audio Format CS5344 Supports Left-Justified Audio Format
General Description
The CS5343/4 is a complete analog-to-digital converter for digital audio systems. It performs sampling, analogto-digital conversion, and anti-alias filtering, generating 24-bit values for both left and right inputs in serial form at sample rates up to 108 kHz per channel. The CS5343/4 uses a 3rd-order, multi-bit Delta-Sigma modulator followed by a digital filter, which removes the need for an external anti-alias filter. The CS5343/4 also features a high-impedance sampling network which eliminates costly external components such as op-amps. The CS5343/4 is available in a 10-pin TSSOP package for both Commercial (-40 to +85 C) and Automotive grades (-40 to +105 C). The CDB5343 Customer Demonstration Board is also available for device evaluation and implementation suggestions. Please refer to the "Ordering Information" on page 21 for complete details. The CS5343/4 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.
VA 3.3 V to 5 V
Single-Ended Analog Input
AINL
High-Z Sampling Network
High-Pass Filter
Low-Latency Digital Filters
Auto-detect MCLK Divider
Master Clock
FILT+
VQ
Internal Reference Voltages
Serial Port
Slave Mode Auto-detect
SCLK LRCK
Single-Ended Analog Input
AINR
High-Z Sampling Network
High-Pass Filter
Low-Latency Digital Filters
SDOUT
http://www.cirrus.com
Copyright (c) Cirrus Logic, Inc. 2007 (All Rights Reserved)
MARCH '07 DS687F1
CS5343/4
TABLE OF CONTENTS
1. PIN DESCRIPTIONS .............................................................................................................................. 4 2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 5 RECOMMENDED OPERATING CONDITIONS ..................................................................................... 5 ABSOLUTE MAXIMUM RATINGS ......................................................................................................... 5 ANALOG CHARACTERISTICS - COMMERCIAL GRADE (-CZZ) ......................................................... 6 ANALOG CHARACTERISTICS - AUTOMOTIVE GRADE (-DZZ) ......................................................... 7 DIGITAL FILTER CHARACTERISTICS ................................................................................................ 8 DC ELECTRICAL CHARACTERISTICS ................................................................................................ 8 DIGITAL CHARACTERISTICS ............................................................................................................... 9 SYSTEM CLOCKING AND SERIAL AUDIO INTERFACE ................................................................... 10 3. TYPICAL CONNECTION DIAGRAM ................................................................................................... 12 4. APPLICATIONS ................................................................................................................................... 13 4.1 Operation as Clock Master or Slave ............................................................................................... 13 4.1.1 Slave Mode Operation ........................................................................................................... 13 4.1.2 Master Mode Operation ......................................................................................................... 14 4.1.2.1 Master Mode Speed Selection ................................................................................... 14 4.1.3 Master Clock ......................................................................................................................... 14 4.2 Serial Audio Interface ..................................................................................................................... 15 4.3 Digital Interface ............................................................................................................................... 15 4.4 Analog Connections ....................................................................................................................... 15 4.4.1 Component Values ................................................................................................................ 16 4.5 Grounding and Power Supply Decoupling ...................................................................................... 16 4.6 Synchronization of Multiple Devices ............................................................................................... 17 5. FILTER PLOTS .................................................................................................................................... 17 6. PARAMETER DEFINITIONS ................................................................................................................ 19 7. PACKAGE DIMENSIONS .................................................................................................................... 20 THERMAL CHARACTERISTICS .......................................................................................................... 20 8. ORDERING INFORMATION ................................................................................................................ 21 9. REVISION HISTORY ............................................................................................................................ 21
LIST OF FIGURES
Figure 1. CS5343 IS Serial Audio Interface .............................................................................................. 11 Figure 2. CS5344 Left-Justified Serial Audio Interface .............................................................................. 11 Figure 3. Typical Connection Diagram....................................................................................................... 12 Figure 4. CS5343 IS Serial Audio Interface .............................................................................................. 15 Figure 5. CS5344 Left-Justified Serial Audio Interface .............................................................................. 15 Figure 6. CS5343/4 Analog Input Network................................................................................................. 15 Figure 7. CS5343/4 Example Analog Input Network.................................................................................. 16 Figure 8. Single-Speed Mode Stopband Rejection .................................................................................... 17 Figure 9. Single-Speed Mode Transition Band .......................................................................................... 17 Figure 10. Single-Speed Mode Transition Band (Detail)............................................................................ 17 Figure 11. Single-Speed Mode Passband Ripple ...................................................................................... 17 Figure 12. Double-Speed Mode Stopband Rejection................................................................................. 18 Figure 13. Double-Speed Mode Transition Band....................................................................................... 18 Figure 14. Double-Speed Mode Transition Band (Detail) .......................................................................... 18 Figure 15. Double-Speed Mode Passband Ripple..................................................................................... 18
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LIST OF TABLES
Table 1. Master/Slave Mode Selection ...................................................................................................... 13 Table 2. Speed Modes and the Associated Sample Rates (Fs) in Slave Mode......................................... 13 Table 3. Speed Modes and the Associated Sample Rates (Fs) in Master Mode....................................... 14 Table 4. Speed Mode Selection in Master Mode ....................................................................................... 14 Table 5. Common MCLK Frequencies in Master and Slave Modes .......................................................... 14 Table 6. Analog Input Design Parameters ................................................................................................. 16
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CS5343/4 1. PIN DESCRIPTIONS
SDOUT SCLK LRCK MCLK FILT+
1 2 3 4 5
10 9 8 7 6
VA GND AINR VQ AINL
Pin Name Pin #
SDOUT SCLK LRCK MCLK FILT+ AINL AINR VQ GND VA 1 2 3 4 5 6 8 7 9 10
Pin Description
Serial Audio Data Output (Output) - Output for two's complement serial audio data. Also selects Master or Slave Mode; See Section 4.1 on page 13 for details. Serial Clock (Input/Output) - Serial clock for the serial audio interface. Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the serial audio data line. Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters. Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits. Analog Input (Input) - The full-scale analog input level is specified in the Analog Characteristics specification table. Quiescent Voltage (Output) - Filter connection for the internal quiescent reference voltage. Ground (Input) - Ground reference. Must be connected to analog ground. Power (Input) - Positive power supply for the digital and analog sections.
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CS5343/4 2. CHARACTERISTICS AND SPECIFICATIONS RECOMMENDED OPERATING CONDITIONS
GND = 0 V, all voltages with respect to GND. Parameter
Power Supplies Ambient Operating Temperature Commercial (-CZZ) Automotive (-DZZ)
Symbol
VA TAC TAD
Min
3.1 4.75 -40 -40
Typ
3.3 5.0 -
Max
3.5 5.25 85 105
Unit
V V C C
ABSOLUTE MAXIMUM RATINGS
GND = 0 V, all voltages with respect to GND. (Note 1) Parameter
DC Power Supplies Input Current Input Voltage Ambient Operating Temperature (Power Applied) Storage Temperature (Note 2) (Note 3)
Symbol
VA Iin VIN TA Tstg
Min
-0.3 -10 -0.7 -50 -65
Max
+6.0 +10 VA+0.7 +115 +150
Unit
V mA V C C
Notes: 1. Operation beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. 2. Any pin except supplies. Transient currents of up to 100 mA on the analog input pins will not cause SCR latch-up. 3. The maximum over/under voltage is limited by the input current.
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CS5343/4 ANALOG CHARACTERISTICS - COMMERCIAL GRADE (-CZZ)
Test conditions (unless otherwise specified): TA = 25 C; Input test signal is a 997 Hz sine wave through recommended inputs as seen in Figure 6 on page 15; source impedance less than or equal to 2.5 k; valid with FILT+ and VQ components as shown in Figure 3 on page 12; measurement bandwidth is 10 Hz to 20 kHz; Fs = 48 kHz or 96 kHz. Dynamic Performance for Commercial Grade
Symbol Dynamic Range Total Harmonic Distortion + Noise A-weighted unweighted (Note 4) -1 dB THD+N -20 dB -60 dB Min 91 88 -
VA = 3.3 V
Typ 94 91 -89 -71 -31 Max -86 Min 95 92 -
VA = 5.0 V
Typ 98 95 -92 -75 -35 Max -89 Unit dB dB dB dB dB
Dynamic Performance for Commercial Grade
Min Interchannel Isolation -
VA = 3.3 V and VA = 5.0 V
Typ 90 Max Unit dB
DC Accuracy
Interchannel Gain Mismatch Gain Error Gain Drift -3 0.1 +3 dB % ppm/C
100
0.568*VA 0.559*VA 7.5
Analog Input Characteristics
Full-scale Input Voltage Full-scale Input Voltage Input Impedance VA = 3.3 V nom VA = 5 V nom 0.560*VA 0.552*VA 0.575*VA 0.567*VA Vpp Vpp M
Notes: 4. Referred to the typical full-scale input voltage
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CS5343/4 ANALOG CHARACTERISTICS - AUTOMOTIVE GRADE (-DZZ)
Test conditions (unless otherwise specified): TA = -40 C to 85 C; Input test signal is a 997 Hz sine wave through recommended inputs as seen in Figure 6 on page 15; source impedance less than or equal to 2.5 k; valid with FILT+ and VQ components as shown in Figure 3 on page 12; measurement bandwidth is 10 Hz to 20 kHz; Fs = 48 kHz or 96 kHz. Dynamic Performance for Automotive Grade
Symbol Dynamic Range Total Harmonic Distortion + Noise A-weighted unweighted (Note 5) -1 dB THD+N -20 dB -60 dB
VA = 3.1 to 3.5 V
Min 86 83 Typ 94 91 -88 -71 -31 Max -76 -
VA = 4.75 to 5.25 V
Min 90 87 Typ 98 95 -91 -75 -35 Max -84 Unit dB dB dB dB dB
Dynamic Performance for Automotive Grade
Interchannel Isolation
VA = 3.1 V to 3.5 V and VA = 4.75 V to 5.25 V
Min Typ 90 Max Unit dB
DC Accuracy
Interchannel Gain Mismatch Gain Error Gain Drift -3 0.1 +3 dB % ppm/C
100
0.567*VA 0.560*VA 7.5
Analog Input Characteristics
Full-scale Input Voltage Full-scale Input Voltage Input Impedance VA = 3.1 V to 3.5 V VA = 4.75 V to 5.25 V 0.523*VA 0.543*VA 0.612*VA 0.573*VA Vpp Vpp M
Notes: 5. Referred to the typical full-scale input voltage
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CS5343/4 DIGITAL FILTER CHARACTERISTICS
Parameter
Passband Passband Ripple Stopband Stopband Attenuation (-0.1 dB)
Symbol
Min
0 -0.025 0.560 69
Typ
12/Fs 9/Fs 1 20 10 -
Max
0.489 0.025 0
Unit
Fs dB Fs dB s s Hz Hz Deg dB
Single-Speed Mode Double-Speed Mode
Fs = 4 - 54 kHz
tgd tgd (Note 6) (Note 6) -
Total Group Delay (Fs = Output Sample Rate)
Fs = 86 - 108 kHz
Total Group Delay (Fs = Output Sample Rate)
High-Pass Filter Characteristics
Frequency Response Phase Deviation Passband Ripple -3.0 dB -0.13 dB @ 20 Hz
Notes: 6. Response shown is for Fs equal to 48 kHz. Filter characteristics scale with Fs.
DC ELECTRICAL CHARACTERISTICS
GND = 0 V, all voltages with respect to 0 V. MCLK=12.288 MHz; Master Mode. VA = 3.3 V Parameter
Power Supply Current Power Supply Current Power Consumption (Normal Operation) (Power-Down Mode) (Note 7) (Normal Operation) (Power-Down Mode) (Note 7)
VA = 5.0 V Typ
12 40 60 <1
Symbol Min
IA IA -
Typ
11 10 36 <1
Max Min
15 50 -
Max
17 85 -
Unit
mA uA mW mW
Parameter
Power Supply Rejection Ratio (1 kHz) VQ Nominal Voltage Output Impedance Filt+ Nominal Voltage Output Impedance Maximum allowable DC current source/sink (Note 8)
Symbol
PSRR
Min
-
Typ
65 0.44xVA 25 VA 220 2.5
Max
-
Unit
dB V k V k uA
Notes: 7. Device enters power-down mode when MCLK is held static. 8. Valid with the recommended capacitor values on FILT+ and VQ as shown in the Typical Connection Diagram.
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CS5343/4 DIGITAL CHARACTERISTICS
Parameter
High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage at Io = 500 A Low-Level Output Voltage at Io =500 A Input Leakage Current (% of VA) (% of VA) (% of VA) (% of VA)
Symbol
VIH VIL VOH VOL Iin
Min
60 70 -10
Typ
-
Max
30 15 10
Units
% % % % A
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CS5343/4 SYSTEM CLOCKING AND SERIAL AUDIO INTERFACE
Logic "0" = GND = 0 V; Logic "1" = VA, CL = 20 pF. Parameter Master Mode
MCLK Period (Double-Speed, 384x Mode) (Double-Speed, 192x Mode) (Double-Speed, 256x Mode) (Double-Speed, 128x Mode) (Single-Speed, 768x Mode) (Single-Speed, 384x Mode) (Single-Speed, 512x Mode) (Single-Speed, 256x Mode) MCLK Duty Cycle Output Sample Rate LRCK Duty Cycle SCLK Duty Cycle SDOUT valid before SCLK rising SDOUT valid after SCLK rising SCLK falling to LRCK edge tstp thld tslrd (Double-Speed, 384x Mode) (Double-Speed, 192x Mode) (Double-Speed, 256x Mode) (Double-Speed, 128x Mode) (Single-Speed, 768x Mode) (Single-Speed, 384x Mode) (Single-Speed, 512x Mode) (Single-Speed, 256x Mode) MCLK Duty Cycle Input Sample Rate LRCK Duty Cycle SCLK Period SCLK Duty Cycle SDOUT valid before SCLK rising SDOUT valid after SCLK rising SCLK falling to LRCK edge tstp thld tslrd tsclkw (Single-Speed) (Double-Speed) Fs tclkw (Single-Speed) (Double-Speed) Fs tclkw 24 48 36 72 24 48 36 72 40 4 86 10 40 -20 50 50 50 30 60 45 90 325 651 488 976 60 54 108 20 ns ns ns ns ns ns ns ns % kHz kHz % % ns ns ns
Symbol
Min
Typ
Max
Unit
Slave Mode
MCLK Period 24 48 36 72 24 48 36 72 40 4 86 40 1----------------64 x Fs 45 10 40 -20 50 50 50 30 60 45 90 325 651 488 976 60 54 108 60 55 20 ns ns ns ns ns ns ns ns % kHz kHz % ns % ns ns ns
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t slrd LRCK t sclkw SCLK
SDOUT
MSB
MSB-1
t stp
t hld
Figure 1. CS5343 IS Serial Audio Interface
tslrd LRCK t sclkw SCLK
SDOUT
MSB
MSB-1
t stp
t hld
Figure 2. CS5344 Left-Justified Serial Audio Interface
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CS5343/4 3. TYPICAL CONNECTION DIAGRAM
3.3 V to 5 V
0.1 F
10
1 F
VA or GND VA
10 k1
1
VA
5
10 k2
1 F
0.1 F
9
CS5343/4
GND SDOUT SCLK
6
1 F
0.1 F
7
VQ
10 k2
FILT+
2
AINL
LRCK MCLK
3
Analog Input Conditioning
See Figure 6 on page 15
8
Audio Processor/ System Clocks
4
1
Pull-up to VA for Master Mode Pull-down to GND for Slave Mode
AINR
Optional pull-up resistor for configuring clocks in Master Mode as described in the "Master Mode Speed Selection" section on page 14
2
Figure 3. Typical Connection Diagram
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CS5343/4 4. APPLICATIONS
4.1 Operation as Clock Master or Slave
The CS5343/4 supports operation as either a clock master or slave. As a clock master, the left/right and serial clocks are synchronously generated on-chip and output on the LRCK and SCLK pins, respectively. As a clock slave, the LRCK and SCLK pins are always inputs and require external generation of the left/right and serial clocks. The selection of clock master or slave is made via a 10 k pull-up resistor from SDOUT to VA for Master Mode selection or via a 10 k pull-down resistor from SDOUT to GND for Slave Mode selection, as shown in Table 1.
Mode
Master Mode Slave Mode
Selection 10 k pull-up resistor from SDOUT to VA 10 k pull-down resistor from SDOUT to GND
Table 1. Master/Slave Mode Selection
4.1.1
Slave Mode Operation
A unique feature of the CS5343/4 is the automatic selection of either Single- or Double-Speed Mode when acting as a clock slave. The auto-mode selection feature supports all standard audio sample rates from 4 to 108 kHz. Please refer to Table 2 for supported sample rate ranges in Slave Mode. Speed Mode MCLK/LRCK Ratio
256x Single-Speed Mode 512x 384x 768x 128x Double-Speed Mode 256x 192x 384x
SCLK/LRCK Ratio
64 64 48, 64 48, 64 64 64 48, 64 48, 64
Input Sample Rate Range (kHz)
4 - 54 4 - 54 4 - 54 4 - 54 86 - 108 86 - 108 86 - 108 86 - 108
Table 2. Speed Modes and the Associated Sample Rates (Fs) in Slave Mode
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4.1.2 Master Mode Operation
As clock Master, the CS5343/4 generates LRCK and SCLK synchronously on-chip. Table 3 shows the available sample rates and associated clock ratios in Master Mode. Speed Mode MCLK/LRCK Ratio
256x Single-Speed Mode 512x 384x 768x 128x Double-Speed Mode 256x 192x 384x
SCLK/LRCK Ratio
64 64 64 64 64 64 64 64
Input Sample Rate Range (kHz)
4 - 54 4 - 54 4 - 54 4 - 54 86 - 108 86 - 108 86 - 108 86 - 108
Table 3. Speed Modes and the Associated Sample Rates (Fs) in Master Mode
4.1.2.1
Master Mode Speed Selection
During power-up in Master Mode, the LRCK and SCLK pins are inputs to configure speed mode and the output clock ratio. The LRCK pin is pulled low internally to select Single-Speed Mode by default, but Double-Speed Mode is accessed with a 10 k pull-up resistor from LRCK to VA as shown in Table 4. Similarly, the SCLK pin is internally pulled-low by default to select a 256x/512x MCLK/LRCK ratio, but a MCLK/LRCK ratio of 348x/768x is accessed with a 10 k pull-up resistor from SCLK to VA as shown in Table 4. Following the power-up routine, the LRCK and SCLK pins become clock outputs. Pin
LRCK SCLK
Resistor Option
Internal Pull-Down to GND (100 k) External Pull-Up to VA (10 k) Internal Pull-Down to GND (100 k) External Pull-Up to VA (10 k)
Clock Configuration
Single-Speed Mode (default) Double-Speed Mode 128x/256x/512x MCLK/LRCK (default) 192x/384x/768x MCLK/LRCK
Table 4. Speed Mode Selection in Master Mode
4.1.3
Master Clock
The CS5343/4 requires a Master clock (MCLK) which runs the internal sampling circuits and digital filters. There is an internal automatic MCLK divider which is activated based on the input frequency of MCLK. This divider selection allows the high and low MCLK speeds in a given speed mode (i.e. 256x and 512x in SSM). Table 4 lists some common audio output sample rates and the required MCLK frequency. Master and Slave Mode MCLK(MHz) Speed Mode
SSM SSM SSM 256x 8.912 11.289 12.288
Sample Rate (kHz)
32 44.1 48
MCLK (MHz)
384x 12.288 16.934 18.432 192x 16.934 18.432 768x 24.576 33.868 36.864 384x 33.868 36.864
512x 16.384 22.579 24.576 256x 22.579 24.576
Sample Rate (kHz)
88.2 96
Speed Mode
DSM DSM
MCLK(MHz)
128x 11.289 12.288
MCLK (MHz)
Table 5. Common MCLK Frequencies in Master and Slave Modes
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4.2 Serial Audio Interface
The CS5343 output is serial data in IS audio format and the CS5344 output is serial data in Left-Justified audio format. Figures 4 and 5 show the IS and Left-Justified data relative to SCLK and LRCK. Additionally, Figures 1 and 2 display more information on the required timing for the serial audio interface format. For an overview of serial audio interface formats, please refer to Cirrus Application Note AN282.
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
Figure 4. CS5343 IS 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
0
23 22
Figure 5. CS5344 Left-Justified Serial Audio Interface
4.3
Digital Interface
VA supplies power to both the analog and digital sections of the ADC, and also powers the serial port. Consequently, the digital interface logic level must equal VA to within the limits specified under "Digital Characteristics" on page 9.
4.4
Analog Connections
The analog modulator samples the input signal at half of the internal master clock rate, or 6.144 MHz when MCLK = 12.288 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 x 6.144 MHz), where n=0,1,2,... Refer to Figure 6 which shows the recommended topology of the analog input network. The external shunt capacitor and internal input impedance form a single-pole RC filter to provide the appropriate filtering of noise at the modulator sampling frequency. Additionally, the 180 pF capacitor acts as a charge source for the internal sampling circuits. Capacitors of NPO or other high-quality dielectric will produce the best results while capacitors with a large voltage coefficient (such as general-purpose ceramics) can degrade signal linearity.
R1
1 F
CS5343/4 AIN
Input
R2 180pF C0G
Figure 6. CS5343/4 Analog Input Network
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4.4.1 Component Values
Three parameters determine the values of resistors R1 and R2 as shown in Figure 6: source impedance, attenuation, and input impedance. Table 6 shows the design equation used to determine these values. * Source Impedance: Source impedance is defined as the impedance as seen from the ADC looking back into the signal network. The ADC achieves optimal THD+N performance with a source impedance less than or equal to 2.5 k. Attenuation: The required attenuation factor depends on the magnitude of the input signal. The fullscale input voltage is specified under "Analog Characteristics - Commercial Grade (-CZZ)" on page 6. The user should select values for R1 and R2 such that the magnitude of the incoming signal multiplied by the attenuation factor is less than or equal to the full-scale input voltage of the device. Input Impedance: Input impedance is the impedance from the signal source to the ADC analog input pins, including the ADC. Because the ADC's input impedance (see the "Analog Characteristics - Commercial Grade (-CZZ)" table on page 6) is several orders of magnitude larger than the resistor values typically used for the input attenuator, its contribution can be neglected when calculating the input impedance. Table 6 shows the input parameters and the associated design equations for the input attenuator.
Source Impedance Attenuation Factor Input Impedance ( R1 x R2 ) -----------------------R1 + R2 ( R2 ) -----------------------( R1 + R2 ) ( R1 + R2 )
*
*
Table 6. Analog Input Design Parameters
Figure 7 illustrates an example configuration using two 4.99 k resistors in place of R1 and R2. Based on the discussion above, this circuit provides an optimal interface for both the ADC and the signal source. First, consumer equipment frequently requires an input impedance of 10 k, which the 4.99 k resistors provide. Second, this circuit will attenuate a typical line level voltage, 2 Vrms, to the full-scale input of the ADC, 1 Vrms when VA = 5 V. Finally, at 2.5 k, the source impedance optimizes analog performance of the ADC. 4.99 k 1 F
CS5343/4 AIN
Input
4.99 k 180pF C0G
Figure 7. CS5343/4 Example Analog Input Network
4.5
Grounding and Power Supply Decoupling
As with any high-resolution converter, designing with the CS5343/4 requires careful attention to power supply and grounding arrangements if its potential performance is to be realized. Figure 3 shows the recommended power arrangements, with VA connected to a clean supply. 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 F, must be positioned to minimize the electrical path from FILT+ to GND. The CDB5343 evaluation board demonstrates the optimum layout and power supply arrangements. To minimize digital noise, connect the ADC digital outputs only to CMOS inputs.
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4.6 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, SCLK, and LRCK signals must be the same for all of the CS5343 and CS5344 devices in the system.
5. FILTER PLOTS
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 0.40 0.42 0.44
Amplitude (dB)
Amplitude (dB)
0.46 0.48 0.50
0.52
0.54
0.56
0.58
0.60
Frequency (norm alized to Fs)
Frequency (norm alized to Fs)
Figure 8. Single-Speed Mode Stopband Rejection
Figure 9. Single-Speed Mode Transition Band
0 -1 -2
0.10 0.08 0.06
Amplitude (dB)
-3 -4 -5 -6 -7 -8 -9 -10 0.46 0.47 0.48 0.49 0.50 0.51 0.52
Amplitude (dB)
0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Frequency (norm alized to Fs)
Frequency (norm alized to Fs)
Figure 10. Single-Speed Mode Transition Band (Detail)
Figure 11. Single-Speed Mode Passband Ripple
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0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 0.40 0.42 0.44
Amplitude (dB)
Amplitude (dB)
0.46 0.48 0.50
0.52
0.54
0.56
0.58
0.60
Frequency (norm alized to Fs)
Frequency (norm alized to Fs)
Figure 12. Double-Speed Mode Stopband Rejection
Figure 13. Double-Speed Mode Transition Band
0 -1 -2
0.10 0.08 0.06
Amplitude (dB)
-3 -4 -5 -6 -7 -8 -9 -10 0.46 0.47 0.48 0.49 0.50 0.51 0.52
Amplitude (dB)
0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Frequency (norm alized to Fs)
Frequency (norm alized to Fs)
Figure 14. Double-Speed Mode Transition Band (Detail)
Figure 15. Double-Speed Mode Passband Ripple
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CS5343/4 6. 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.
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CS5343/4 7. PACKAGE DIMENSIONS 10LD TSSOP (3 mm BODY) PACKAGE DRAWING (Note 1)
N
D c E A2 A1
L
E11 A
e b END VIEW SIDE VIEW SEATING PLANE
L1
123
TOP VIEW
INCHES DIM
A A1 A2 b c D E E1 e L L1
MILLIMETERS MAX
0.0433 0.0059 0.0374 0.0118 0.0091 ----0.0315 -8
NOTE MAX
1.10 0.15 0.95 0.30 0.23 ----0.80 -8
MIN
-0 0.0295 0.0059 0.0031 ----0.0157 -0
NOM
-----0.1181 BSC 0.1929 BSC 0.1181 BSC 0.0197 BSC 0.0236 0.0374 REF --
MIN
-0 0.75 0.15 0.08 ----0.40 -0
NOM
-----3.00 BSC 4.90 BSC 3.00 BSC 0.50 BSC 0.60 0.95 REF --
4, 5 2 3
Controlling Dimension is Millimeters
Notes: 1. Reference document: JEDEC MO-187 2. D does not include mold flash or protrusions, which is 0.15 mm max. per side. 3. E1 does not include inter-lead flash or protrusions, which is 0.15 mm max per side. 4. Dimension b does not include a total allowable dambar protrusion of 0.08 mm max. 5. Exceptions to JEDEC dimension.
THERMAL CHARACTERISTICS
Parameter
Allowable Junction Temperature Junction to Ambient Thermal Impedance (4-layer PCB) (2-layer PCB)
Symbol
TJ
Min
-
Typ
100 170
Max
135 -
Unit C C/W C/W
JA-4 JA-2
20
DS687F1
CS5343/4 8. ORDERING INFORMATION
Description 98 dB, Multi-Bit Audio CS5343 A/D Converter, IS Audio Format 98 dB, Multi-Bit Audio CS5343 A/D Converter, IS Audio Format 98 dB, Multi-Bit Audio CS5344 A/D Converter, Left-Justified Audio Format 98 dB, Multi-Bit Audio CS5344 A/D Converter, Left-Justified Audio Format CDB5343 CS5343 Evaluation Board Product Package 10-TSSOP Pb-Free Yes Grade Temp Range Container Rail Tape & Reel Rail 10-TSSOP Yes Automotive -40 to +105 C Tape & Reel Rail 10-TSSOP Yes Commercial -40 to +85 C Tape & Reel Rail 10-TSSOP Yes No Automotive -40 to +105 C Tape & Reel Order # CS5343-CZZ CS5343-CZZR CS5343-DZZ CS5343-DZZR CS5344-CZZ CS5344-CZZR CS5344-DZZ CS5344-DZZR CDB5343
Commercial -40 to +85 C
9. REVISION HISTORY
Release
A4
Changes
Corrected MCLK timing specifications on page 10 Corrected "Typical Connection Diagram" on page 12 Corrected Table 3, "Speed Modes and the Associated Sample Rates (Fs) in Master Mode," on page 14 Updated "Recommended Operating Conditions" on page 5 Updated specifications and limits for "Analog Characteristics - Commercial Grade (-CZZ)" on page 6 Updated specifications and limits for "Analog Characteristics - Automotive Grade (-DZZ)" on page 7 Corrected "Power Supply Current (Normal Operation)" on page 8 Increased specification for Slave-Mode "SDOUT valid after SCLK rising" on page 10 Corrected Section 4.1.2.1 on page 14 Updated Section 4.1.3 on page 14
F1
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 Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners.
DS687F1
21

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