CS5396-KS Cirrus Logic Inc, CS5396-KS Datasheet

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CS5396-KS

Manufacturer Part Number
CS5396-KS
Description
ADC Dual Delta-Sigma 96KSPS 24-Bit Serial 28-Pin SOIC
Manufacturer
Cirrus Logic Inc
Datasheet

Specifications of CS5396-KS

Package
28SOIC
Resolution
24 Bit
Sampling Rate
96 KSPS
Architecture
Delta-Sigma
Number Of Analog Inputs
2
Digital Interface Type
Serial (SPI)
Input Type
Voltage
Sample And Hold
Yes
Polarity Of Input Voltage
Bipolar

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CS5396-KS
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CRYSTAL
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Part Number:
CS5396-KS
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CS
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CS5396-KSEP
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CS5396-KSZ
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Quantity:
20 000
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
Features
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Preliminary Product Information
24-Bit Conversion
120 dB Dynamic Range (A-Weighted)
Low Noise and Distortion
>105 dB THD + N
Complete CMOS Stereo A/D System
Delta-Sigma A/D Converters
Digital Anti-Alias Filtering
S/H Circuitry and Voltage Reference
CS5396 - digital filter optimized for audio
CS5397 - non-aliasing digital filter
Adjustable System Sampling Rates
including 32, 44.1, 48 & 96 kHz
Differential Analog Architecture
Linear Phase Digital Anti-Alias Filtering
10 Tap Programmable Psychoacoustic Noise
Shaping Filter
Single +5 V Power Supply
120 dB, 96 kHz Audio A/D Converter
AINR+
AINL+
VREF
AINR-
AINL-
VA
VCOM
S/H
S/H
Voltage Reference
AGND1
+
+
MCLKA
-
-
AGND2 AGND0 VL
DAC
DAC
LP Filter
LP Filter
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
ADCTL
Comparator
Comparator
+
+
-
-
LGND
DACTL
Copyright
Digital Decimation
Digital Decimation
(with Low Group
(with Low Group
Microcontroller
General Description
The CS5396 and CS5397 are complete analog-to-digital
converters for stereo digital audio systems. They per-
form sampling, analog-to-digital conversion and anti-
alias filtering, generating 24-bit values for both left and
right inputs in serial form at sample rates up to 100 kHz
per channel.
The CS5396/97 use a patented 7th-order, tri-level delta-
sigma modulator followed by digital filtering and decima-
tion, which removes the need for an external anti-alias
filter. The ADCs use a differential architecture which pro-
vides excellent noise rejection.
The CS5396 has a linear phase filter optimized for audio
applications with ±0.005 dB passband ripple and
>117 dB stopband rejection. The CS5397 has a non-
aliasing filter response with ±0.005 passband ripple and
>117 dB stopband attenuation. Other features available
in both the CS5396 and CS5397 are an optional low
group delay filter and a unique psychoacoustic noise
shaping filter which subjectively truncates the output to
16, 18 or 20 bits while 24-bit sound quality is preserved.
The CS5396/97 are targeted for the highest perfor-
mance professional audio systems requiring wide
dynamic range, negligible distortion and low noise.
ORDERING INFORMATION
Delay Options)
Delay Options)
Calibration
CAL
TST0
Serial Output Interface
Filter
Filter
(All Rights Reserved)
SCLK
CS5396-KS
CS5397-KS
CDB5396/97
TST1
LRCK
Cirrus Logic, Inc. 1997
VD
SDATA1
DGND
Psychoacoustic
Calibration
SDATA2
SRAM
Filter
Control
Serial
Port
-10° to 50° C
-10° to 50° C
MCLKD
CS
CDIN
CCLK
CS5396
CS5397
28-pin SOIC
28-pin SOIC
Evaluation Board
DS229PP2
SEP ‘97
1

Related parts for CS5396-KS

CS5396-KS Summary of contents

Page 1

... The CS5396/97 are targeted for the highest perfor- mance professional audio systems requiring wide dynamic range, negligible distortion and low noise. ORDERING INFORMATION CS5396-KS CS5397-KS CDB5396/97 VCOM MCLKA ADCTL ...

Page 2

... SPI Mode ......................................................................................................... Mode .........................................................................................................19 Establishing the Chip Address in I ANALOG CONNECTIONS - ALL MODES .......................................................................19 GROUNDING AND POWER SUPPLY DECOUPLING - ALL MODES ............................20 DIGITAL FILTER PLOTS .................................................................................................21 REGISTER DESCRIPTION ...............................................................................................25 PIN DESCRIPTIONS .........................................................................................................31 Power Supply Connections .....................................................................................31 Analog Inputs...........................................................................................................31 Analog Outputs........................................................................................................32 Digital Inputs............................................................................................................32 2 CS5396 CS5397 2 C Mode ....................................................19 DS229PP2 ...

Page 3

... Digital Input Pin Definitions for Stand-Alone MODE ............................................... 32 Digital Pin Definitions for CONTROL-PORT MODE................................................ 33 Digital Outputs......................................................................................................... 33 Digital Inputs or Outputs.......................................................................................... 34 Miscellaneous ......................................................................................................... 34 PARAMETER DEFINITIONS............................................................................................. 35 ADDITIONAL INFORMATION........................................................................................... 36 PACKAGE DIMENSIONS ................................................................................................. 37 DS229PP2 CS5396 CS5397 3 ...

Page 4

... THD (following calibration) V (Note 2) Z Differential Common-mode CMRR CS5396 CS5397 Min Typ Max TBD TBD 120 - TBD 117 - TBD 120 - 114 - TBD TBD 117 ...

Page 5

... Min Typ 0.5542 - 117 - 34/Fs - 34/ 0.646 - 0.323 - 10/ (Note 3) - 1.8 (Note 3) 20 (Note CS5396 CS5397 CS5397 Max Min Typ Max 0.4604 0 - 0.3958 0.005 - - 0.005 63.45 0.4979 - 63.50 - 117 - - - - 34/ 34/ 0.0 0.375 0 - 0.375 0.188 0 - 0.188 0.015 - - 0.015 127.35 0.646 - 127.35 63.68 0.323 - 63 ...

Page 6

... DGND = 0V, All voltages with respect to ground.) Symbol Analog VA VL Logic VD Digital |VA - VD| (Note 6) |VA - VL| (Note 6) |VD - VL| (Note 6) (Note (Note (Note 5) V IND stg CS5396 CS5397 128X oversampling MCLK=24.576 MHz Max Min Typ Max Unit TBD - 160 TBD mA TBD - 125 TBD 3.5 - ...

Page 7

... CS5396 CS5397 Min Typ Max Units 4.75 5.0 5.25 V 4.75 5.0 5.25 V 4.75 5.0 5. 0.4 V -10 - +50 C Typ Max Units - 100 kHz - 1950 ...

Page 8

... S compatible 8 SCLK input LRCK input MSB MSB-1 SDATA SCLK to LRCK & SDATA - SLAVE mode SCLK input LRCK input t sdo MSB SDATA SCLK to LRCK & SDATA - SLAVE mode CS5396 CS5397 slr1 slr2 sclkh sclkl t lrdss MSB MSB-1 Serial Data Format, Left Justified ...

Page 9

... Notes: 7. Data must be held for sufficient time to bridge the transition time of CCLK. 8. For F < 1 MHz. SCK CS CCLK CDIN DS229PP2 = 20 pF) L Symbol f sck t csh t css t scl t sch t dsu t (Note (Note (Note css t scl t sch dsu t dh CS5396 CS5397 ( °C; VD ±5%; A Min Max Unit - 6 MHz 1.0 - µ 100 ns - 100 ns t csh 9 ...

Page 10

... CCLK pF) L Symbol (Note 9) f scl t buf t hdst t low t high t sust t (Note 10) hdd t sud susp Repeated t high t hdst sud t sust low hdd CS5396 CS5397 ( °C; VD ±5%; A Min Max - 100 4.7 - 4.0 - 4.7 - 4 250 - - 300 f 4.7 - Stop Start susp hdst t r ...

Page 11

... Right Analog Input - DS229PP2 0 VREF CDIN/DFS CCLK/SM VCOM AINL+ CS5396/7 A/D CONVERTER AINL- AINR+ AINR- AGND0 LGND DGND AGND1 AGND2 Figure 1. Typical Connection Diagram CS5396 CS5397 +5V Digital + 0 CS/PDN -Controller/ 18 Configuration 17 10 CAL 16 Audio SDATA1 Data 15 SDATA2 Processor 13 LRCK 14 Timing SCLK Logic 7 & ...

Page 12

... GENERAL DESCRIPTION The CS5396/ 24-bit, stereo A/D converter designed for stereo digital audio applications. The analog input channels are simultaneously sampled by separate, patented, 7th-order tri-level delta-sig- ma modulators at either 128 or 64 times the output sample rate ( 128 Fs) of the device. The resulting serial bit streams are digitally filtered, yielding pairs of 24-bit values at output sample rates (Fs 100 kHz ...

Page 13

... CS5396/97 is placed in the Slave mode with the slave/master pin, S/M, high. High Pass Filter - Stand-Alone Mode The CS5396/97 includes a high pass filter after the decimator to remove the DC offsets introduced by the analog buffer stage and the CS5396/97 analog modulator. The characteristics of this first-order high pass filter are outlined below, for Fs equal to 48 kHz ...

Page 14

... VREF capacitor to settle. This is required to minimize noise and distortion also advised that the CS5396/97 be calibrated after the device has reached thermal equilibrium, approximately 10 seconds, to maximize performance. Synchronization of Multiple Devices - ...

Page 15

... Fs and the cho- sen Oversampling Mode. Table 2 shows some common master clock frequencies. 64 vs. 128 Oversampling Modes The CS5396/97 can operate Oversampling Mode with a 256 master clock (MCLKA/ maximum sample rate of 100 kHz. The device can also operate in a 128 Oversampling Mode with a 512 master clock (MCLKA/D) where the maxi- mum kHz ...

Page 16

... Data Valid on Rising Edge of SCLK MCLK equal to 256x Compatible. 64x Oversampling Mode SLAVE 24-Bit Left Justified Data Data Valid on Rising Edge of SCLK MCLK equal to 512x SLAVE 24-Bit Data Data Valid on Rising Edge of SCLK MCLK equal to 512x Compatible. 128x Oversampling Mode. CS5396 CS5397 Right Right ...

Page 17

... Oversampling Mode and equal to 128 in the 128 Oversampling Mode. Other frequencies are possible but may degrade system performance due to interference effects. The CS5396/97 is placed in the Slave mode via the control register. Synchronization of Multiple Devices - Control Port Mode In systems where multiple ADCs are required, care must be taken to achieve simultaneous sampling ...

Page 18

... CS5396/97 analog modulator. The high pass filter can be defeated with the control register also possible to write to the left/right offset registers to establish a prede- termined offset. The characteristics of this first-order high pass fil- ter are outlined below for Fs equal to 48 kHz. The filter response scales linearly with sample rate ...

Page 19

... Figures 17 - 24. µC Interface Formats The device supports either SPI or I mats. The CS5396/97 monitors the state of CS dur- ing power-up and will configure to an SPI interface if the pin is held low. Conversely, if the pin is held high, the port will configure ...

Page 20

... VREF and pin 3, AGND. The CDB5396/97 evaluation board dem- onstrates the optimum layout and power supply ar- rangements, as well as allowing fast evaluation of the ADC. To minimize digital noise, connect the ADC digital outputs only to CMOS inputs. CS5396 CS5397 DS229PP2 ...

Page 21

... DIGITAL FILTER PLOTS Figures 9-24 show the performance of the digital filters included in the ADC. All plots are normal- ized to Fs. Assuming a sample rate of 48 kHz, the Normalized Frequency (Fs) Figure 9. CS5396 Stop Band Attenuation Normalized Frequency (Fs) Figure 11. CS5396 Transition Band DS229PP2 CS5396 CS5397 ...

Page 22

... Normalized Frequency (Fs) Figure 13. CS5397 Stop Band Attenuation Normalized Frequency (Fs) Figure 15. CS5397 Transition Band 22 CS5396 CS5397 Normalized Frequency (Fs) Figure 14. CS5397 Passband Ripple Normalized Frequency (Fs) Figure 16. CS5397 Transition Band DS229PP2 ...

Page 23

... Stop Band Attenuation 64x Oversampling Mode Normalized Frequency (Fs) Figure 19. Low Group Delay Filter Transition Band 64x Oversampling Mode DS229PP2 CS5396 CS5397 Normalized Frequency (Fs) Figure 18. Low Group Delay Filter Passband Ripple 64x Oversampling Mode Normalized Frequency (Fs) Figure 20. Low Group Delay Filter Transition Band ...

Page 24

... Figure 21. Low Group Delay Filter Stop Band Attenuation 128x Oversampling Mode Figure 23. Low Group Delay Filter Transition Band 128x Oversampling Mode 24 CS5396 CS5397 Figure 22. Low Group Delay Filter Passband Ripple 128x Oversampling Mode Figure 24. Low Group Delay Filter Transition Band 128x Oversampling Mode ...

Page 25

... If this bit is set to ‘1’, the Left channel data from sdata1 source and sdata2 source (stored in Audio port register) will be sent out in SDATA1. SDATA2 will output all the Right channel data. DS229PP2 aapd adpd 1bit _LR/LL _hpen CS5396 CS5397 s/_m DFS mute ...

Page 26

... The LGD output will be the data at the serial audio port 1 if this bit is ‘1’ and all other bits of the port set to ‘0’. LGD(sdata2) Default = ‘1’ standard when DFS psycho psel18/_16 (sdata2 CS5396 CS5397 2 1 lgd lgd psel20/_16 (sdata1) (sdata2 DS229PP2 Out ...

Page 27

... Hold the SDATA1 pin of every chip to ‘1’ during power up. DS229PP2 fir1(LRCK) _psydither test mode. reserved for factory use only caddr4 caddr3 CS5396 CS5397 2 1 dstart1 dstart0 caddr2 caddr1 and SPI mode SPI buses and using chip address is nec caddr0 0 27 ...

Page 28

... Default = ‘0’. Input of psychoacoustic filter is taken from the sdata2 port. The 24-bit input data will be truncat psychoacoustic filter to the chosen output word length and then output to sdata1 of serial audio port hr/_bg 0 0 CS5396 CS5397 ddpd fir2in psychoin DS229PP2 ...

Page 29

... CS5396 CS5397 ralpha ralpha ralpha (bit2) (bit1) (bit0 ralpha ralpha ralpha (bit10) (bit9) (bit8 ralpha ralpha ralpha (bit18) (bit17) (bit16 lalpha lalpha lalpha (bit2) ...

Page 30

... CS5396 CS5397 pc8(bit2) pc8(bit1) pc8(bit0 pc7(bit2) pc7(bit1) pc7(bit0 pc6(bit2) pc6(bit1) pc6(bit0 pc5(bit2) pc5(bit1) pc5(bit0 pc4(bit2) pc4(bit1) pc4(bit0 pc3(bit2) pc3(bit1) pc3(bit0 pc2(bit2) pc2(bit1) pc2(bit0 ...

Page 31

... DGND - Digital Ground, Pin 12. Digital ground for the digital section. Analog Inputs AINR-, AINR+ - Differential Right Channel Analog Inputs, Pin 26, 27. Analog input connections for the right channel differential inputs. Nominally 4.0 Vpp differential for full-scale digital output. DS229PP2 CS5396 CS5397 31 ...

Page 32

... When high, the device enters power-down. Upon returning low, the device enters normal operation. Calibration of the device is required following release of power-down. 32 Oversampling Mode and 48 kHz in 128 x Oversampling Mode and 48 kHz in 128 compatible. The serial data format is left-justified when low. CS5396 CS5397 Oversampling x Oversampling x DS229PP2 ...

Page 33

... Control port data input and output for Chip Select Input, Pin 19. Control port chip select for SPI mode. The CS5396/97 monitors the state of CS during power- up and will configure to an SPI interface if this pin is held low. Conversely, if held high, the port will configure CCLK - Control Port Clock Input, Pin 17 ...

Page 34

... Fs. In slave mode, SCLK is an input which x x the output sample rate in the 64 x the output sample rate. A 128 x SCLK is preferred in the 64 x CS5396 CS5397 to 128 Fs ( the output sample rate in the 128 Oversampling Mode. x SCLK is preferred in the 128 x Oversampling Mode. The ...

Page 35

... 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. Offset Error The deviation of the mid-scale transition (111...111 to 000...000) from the ideal. Units in mV. DS229PP2 CS5396 CS5397 35 ...

Page 36

... Delta-Sigma A/D and D/A Converters” by Steven Harris. Presented at the 93rd Conven- tion of the Audio Engineering Society, October 1992. 36 CS5396 CS5397 5) “The Effects of Sampling Clock Jitter on Nyquist Sampling Analog-to-Digital Convert- ers, and on Oversampling Delta Sigma ADCs” by Steven Harris. Paper presented at the 87th Convention of the Audio Engineering Society, October 1989 ...

Page 37

... PACKAGE DIMENSIONS DS229PP2 28 pin SOIC CS5396 CS5397 MILLIMETERS INCHES DIM MIN MAX MIN A 17.53 18.03 0.690 B 1.27 BSC 0.050 BSC C 7 NOM 7 NOM D 0.127 0.330 0.005 E 2.41 2.67 0.095 F 45 NOM 45 NOM NOM NOM H 0.203 0.381 0.008 7.42 7.59 0.292 K 8.76 9 ...

Page 38

... Optimal Noise Shaping, Journal of the Audio Engineering Society, Vol 40, No 7/8, 1992 July/Au- gust." The default coefficients in the CS5396 are the FIR 9-tap filter coefficients described in Table 3 of the paper. Since the effective noise shaping function is (1-H), the CS5396 registers save the (1-H) func- tion coefficients. Therefore, the negative of each filter coefficient is stored in the registers. Each coefficient is represented as a binary 2’ ...

Page 39

... Filter coefficient a6 (address 15h) Filter coefficient a7 (address 16h) Filter coefficient a8 (address 17h) Filter coefficient a9 (address 18h) Default 1101 1010 a2 - 0011 0101 a3 - 1100 0010 a4 - 0100 0011 a5 - 1100 1011 a6 - 0010 0011 a7 - 1110 1100 a8 - 0000 1001 a9 - 1111 1111 DS229PP2xC BIT 5 BIT 4 BIT 3 CS5396 CS5397 BIT 2 BIT 1 LSB 39 ...

Page 40

TM Smart Analog is a Trademark of Crystal Semiconductor Corporation ...

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