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CDB4228A
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Cirrus Logic CS4228A-KS, CDB4228A Datasheet

CS4228A
24-Bit, 96 kHz Surround Sound Codec

Features

l Six 24-bit D/A Converters
- 100 dB dynamic range
- -90 dB THD+N
l Two 24-bit A/D Converters
- 97 dB dynamic range
- -95 dB THD+N
l Sample rates up to 100 kHz l Pop-free Digital Output Volume Controls
- 90.5 dB range, 0.5 dB resolution (182 levels)
- Variable smooth ramp rate, 0.125 dB steps
l Mute Control pin for off-chip muting circuits l On-chip Anti-alias and Output Filters l De-emphasis filters for 32, 44.1 and 48 kHz
I
SCL/CCLK SDA/CDIN VD

Description

The CS4228A codec provides two analog- to-digital and six digital-to-analog delta- sigma converters, along with volume controls, in a compact 28-pin SSOP device. Combined with an IEC958 (SPDIF) receiver (like the CS8414) and surround so und decoder (such as one of the CS492x or CS 493xx families), it is ide al for use in DVD player, A/V recei ver and car audio s ystems sup­porting multiple s tandards such as Dolby Digital AC-3, AAC, DTS, Dolby ProLogic, THX, and MPEG.
A flexible serial audio interface al lows operation in Left Justified, Right Justified, I
ORDERING INFORMATION
CS4228A-KS -10° to +70° C 28-pin SSOP CDB4228A Evaluation Board
MUTECAD0/CS
RST
2
S, or One Line Data modes.
VA
VL
CONTROL PORT
LRCK SCLK
SDIN1 SDIN2 SDIN3
SDOUT
SERIAL AUDIO
DATA INTERFACE
CLOCK MANAGER
MCLK
DIGITAL FILTERS
WITH DE-EMPHASIS
Preliminary Product Information
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
MUTE CONTROL
DIGITAL FILTERS
∆Σ
∆Σ
∆Σ
∆Σ
∆Σ
∆Σ
DAC #1
DAC #2
DAC #3
DAC #4
DAC #5
DAC #6
LEFT ADC
RIGHT ADC
DGND
DGND AGND
OUTPUT STAGE
ANALOG LOW PASS AND
AGND
FILT
FL FR SL
SR
CENTER
SUB
AINL+ AINL-
AINR+ AINR-
This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice.
Copyright  Cirrus Logic, Inc. 2000
(All Rights Reserved)
DS511PP1
OCT ‘00
1

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS .................................. ....... ...... ....... ...... ....... ..... 4
ANALOG CHARACTERISTICS................................................................................................ 4
DIGITAL CHARACTERISTICS................................................................................................. 6
SWITCHING CHARACTERISTICS . ...... ....... ...... ............................................. ....... ..................6
SWITCHING CHARACTERISTICS - CONTROL PORT...........................................................8
ABSOLUTE MAXIMUM RATINGS .........................................................................................10
RECOMMENDED OPERATING CONDITIONS.....................................................................10
2. TYPICAL CONNECTION DIAGRAM ...................................................................................... 11
3. FUNCTIONAL DESCRIPTION ............................................................................................... 12
3.1 Overview ..........................................................................................................................12
3.2 Analog Inputs ...................................................................................................................12
3.2.1 Line Level Inputs .................................................................................................12
3.2.2 High Pass Filter ...................................................................................................12
3.3 Analog Outputs ................................................................................................................ 13
3.3.1 Line Level Outputs .............................................................................................. 13
3.3.2 Digital Volume Control ........................................................................................13
3.4 Mute Control .................................................................................................................... 14
3.5 Clock Generation ............................................................................................................. 14
3.5.1 Clock Source .......................................................................................................14
3.5.2 Synchronization ...................................................................................................14
3.6 Digital Interfaces .............................................................................................................. 14
3.6.1 Serial Audio Interface Signals .............................................................................14
3.6.2 Serial Audio Interface Formats ............................................................................15
3.7 Control Port Signals .........................................................................................................17
3.7.1 SPI Mode ............................................................................................................17
3.7.2 Two Wire Mode ................................................................................................... 17
3.8 Control Port Bit Definitions ...............................................................................................18
3.9 Power-up/Reset/Power Down Mode ................................................................................ 18
3.10 Power Supply, Layout, and Grounding .......................................................................... 19
4. REGISTER QUICK REFERENCE .......................................................................................... 20
5. REGISTER DESCRIPTIONS ..................................................................................................21
5.1 Memory Address Pointer (MAP) .....................................................................................21
5.2 CODEC Clock Mode ........................................................................................................ 21
5.3 Chip Control .....................................................................................................................22
5.4 ADC Control .....................................................................................................................22
5.5 DAC Mute1 Control ..........................................................................................................23
5.6 DAC Mute2 Control ..........................................................................................................23
CS4228A
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/
Dolby, Pro Logic, and AC-3 are trademarks of Dolby Laboratories Licensing Corporation. Preliminary product inf o rmation describes products whi ch are in production, but for which full character izat i on da t a is not yet available. Advance product infor -
mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best effort s to ensure that the information contained in this document i s accurat e and reli able. However , t he infor mation is subje ct to chang e without noti ce and is provi d ed “AS IS” without warrant y 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 ri g ht s of third parties. This document is the pro perty of Cirrus Logi c, Inc. and i mplie s no licen se under patents, copyrights, tr ademarks, or trade secre ts. 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 pr i or writ ten consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or di sk may be pri nt ed 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.
2 DS511PP1
5.7 DAC De-emphasis Control .............................................................................................. 24
5.8 Digital Volume Control .....................................................................................................24
5.9 Serial Port Mode .............................................................................................................. 25
5.10 Chip Status .................................................................................................................... 25
6. PIN DESCRIPTION ................................ ....... ............................................. ...... ....... ................ 26
7. PARAMETER DEFINITIONS .................................................................................................. 29
8. PACKAGE DIMENSIONS ...................................................................................................... 31

LIST OF FIGURES

Figure 1. Serial Audio Port Master Mode Timing .......................................................................... 7
Figure 2. Serial Audio Port Slave Mode Timing ............................................................................ 7
Figure 3. SPI Control Port Timing ................................................................................................. 8
Figure 4. Two Wire Control Port Timing ........................................................................................ 9
Figure 5. Recommended Connection Diagram ........................................................................... 11
Figure 6. Optional Line Input Buffer ............................................................................................12
Figure 7. Passive Output Filter with Mute ................................................................................... 13
Figure 8. Butterworth Output Filter with Mute ............................................................................. 13
Figure 9. I
Figure 10.Left Justified Serial Audio Formats .............................................................................. 16
Figure 11.Right Justified Serial Audio Formats ............................................................................ 16
Figure 12.One Line Data Serial Audio Format ............................................................................. 16
Figure 13.Control Port Timing, SPI Slave Mode Write ................................................................. 17
Figure 14.Control Port Timing, Two Wire Slave Mode Write ....................................................... 18
Figure 15.Control Port Timing, Two Wire Slave Mode Read ....................................................... 18
2
S Serial Audio Formats ............................................................................................. 15
CS4228A

LIST OF TABLES

Table 1. Serial Audio Port Input Channel Allocations ................................................................... 15
Table 2. Common Master Clock Frequencies.............................................................................. 27
DS511PP1 3

1. CHARACTERISTICS AND SPECIFICATIONS

CS4228A

ANALOG CHARACTERISTICS (Unless otherwise specified T

Scale Input Sine wave, 984.375 Hz; Fs = 48 kHz BRM, 96 kHz HRM; Measurement Bandwidth is 20 Hz to 20 kHz; Local components as shown in Figure 5; SPI control mode, Left Justified serial format, MCLK = 256 x Fs for BRM, 128 x Fs for HRM, SCLK = 64 x Fs)
Base Rate Mode High Rate Mode
Parameter Symbol Min Typ Max Min Typ Max Units
Analog Input Characteristics
Dynamic Range, -60 dBFS input (A weighted)
Total Harmonic Distortion + Noise (Note 1) Interchannel Isolation Interchannel Gain Mismatch Offset Error (with high pass filter) Full Scale Input Voltage (Differential): Gain Drift Input Resistance Input Capacitance
A/D Decimation Filter Characteristics
Passband (Note 3) Passband Ripple Stopband (Note 3) Stopband Attenuation (Note 4) Group Delay Group Delay Variation vs. Frequency
High Pass Filter Characteristics
Frequency Response: -3 dB (Note 5)
Phase Deviation @ 20 Hz
Passband Ripple
- Minimum gain setting (0 dB) Differential Input; unless otherwise specified. 90 97
(unweighted)
(Note 2)
(Note 2)
-0.13 dB
(Note 5)
THD+N - -95 -88 - -95 -88 dB
5.24 5.66 6.09 5.24 5.66 6.09 Vp-p
10--10--kΩ
0.022 - 21.77 0.022 - 43.54 kHz
30.0 - 6114 72.41 - 6071 kHz 80--45--dB
t
gd
∆ t
gd
94
- 100 - - 100 - dB
- 0.1 - - 0.1 - dB
--0--0LSB
- 100 - - 100 - ppm/°C
--15--15pF
- - 0.01 - - 0.05 dB
-TBD- -TBD- s
--0--0µs
-
3.4
-
20
-10- -10-Degree
--0--0dB
= 25° C; VA = VD = VL = +5 V; Full
A
-
-
-
-
90 97
94
-
3.4
-
20
-
-
-
-
dB dB
Hz Hz
Notes: 1. Referenced to typical full-scale differential input voltage (2 Vrms), Tested with -1 dBFS input.
2. Filter response is not tested but is guaranteed by design.
3. Filter characteristics scale with output sample rate.
4. The analog modulator samples the input at 128 times Fs. For example, input the sample rate is
6.144 MHz for an output sample rate of 48 kHz. There is no rejection of input signals which are multiples of the sampling frequency (n × 6.144 MHz ±20.0 kHz where n = 0,1,2,3...).
5. High Pass Filter characteristics are specified for Fs=44.1 KHz.
Specifications are subject to change without notice
4 DS511PP1
ANALOG CHARACTERISTICS (Continued)
Parameter Symbol Min Typ Max Min Typ Max Units
Analog Output Characteristics
Dynamic Range, -60 dBFS input (A weighted)
Total Harmonic Distortion + Noise Interchannel Isolation Interchannel Gain Mismatch Offset Voltage Full Scale Output Voltage Gain Drift Analog Output Load
Minimum Load Resistance:
Maximum Load Capacitance:
Combined Digital and Analog Filter Characteristics
Frequency Response 10 Hz to 20 kHz Deviation from Linear Phase Passband: to 0.01 dB corner (Notes 6, 7) Passband Ripple (Note 7) Stopband (Notes 6, 7) Stopband Attenuation (Notes 5, 8) Group Delay (Fs = Input Word Rate)
Analog Loopback Performance
Signal-to-noise Ratio (CCIR-2K weighted, -20 dB FS input)
- Minimum Attenuation, 10 kΩ, 10 pF load; unless otherwise specified.
(unweighted)
THD+N - -90 -83 - -90 -83 dB
tgd - 27/Fs - - TBD - s
CCIR-2K - 90 - - 90 - dB
CS4228A
Base Rate Mode High Rate Mode
93-100
97
-95- -95- dB
- 0.1 - - 0.1 - dB
-10- -10- mV
3.42 3.7 3.98 3.42 3.7 3.98 Vp-p
- 100 - - 100 - ppm/°C
-
10
-
100
(Note 2)
±0.1 ±0.1 dB
- ±0.5 - - ±0.5 - Degrees
0 - 21.77 0 - 43.54 kHz
- - ±0.01 - - ±0.01 dB
26.2 - - 62.5 - - kHz 70--65--dB
-
-
-
-
93-100
97
-
10
-
100
-
-
-
-
dB dB
kΩ
pF
Notes: 6. The passband and stopband edges scale with frequency. For input word rates, Fs, other than 44.1 kHz,
the 0.01 dB passband edge is 0.4535×Fs and the stopband edge is 0.5465×Fs.
7. Digital filter characteristics.
8. Measurement bandwidth is 10 Hz to 3 Fs.
Specifications are subject to change without notice
DS511PP1 5
ANALOG CHARACTERISTICS (Continued)
Power Supply
Power Supply Current Operating VA = VD = VL = 5 V VA
Power Down: RST
low, Clocks running
Power Supply Rejection (1 kHz, 10 mV
Symbol Min Typ Max Min Typ Max Units
VL
VD
VA VL
VD
)
rms
CS4228A
Base Rate Mode High Rate Mode
-
37
-
0.5
-
85
-
0.5
-
0.2
-
0.5
- 50 - 50 dB
42
2
99
1
0.5 1
-
37
-
0.5
-
85
-
0.5
-
0.2
-
0.5
42
2
99
1
0.5 1
mA mA mA
mA mA mA

DIGITAL CHARACTERISTICS Unless otherwise specified (T

5.25V)
Parameter Symbol Min Max Units
High-level Input Voltage Low-level Input Voltage High-level Output Voltage at VL = 5 V
= -2.0 mA
I
0
= -100 uA
I
0
VL = 2.5 V = -2.0 mA
I
0
Low-level Output Voltage at VL = 5 V
= 2.0 mA
I
0
= 100 uA
I
0
VL = 2.5 V
= -2.0 mA
I
0
Input Leakage Current (Digital Inputs) Output Leakage Current (High-Impe danc e Digi tal Outputs)

SWITCHING CHARACTERISTICS (T

= 25°C; VA = VD + 5V,VL = 2.375 to 5.25V, CL 30 pF)
A
Parameter Symbol Min Typ Max Units
Audio ADC's and DAC's Sample Rate BRM
HRM MCLK Frequency MCLK Duty Cycle BRM
MCLK =128, 384 Fs
MCLK = 256, 512 Fs
HRM
MCLK = 64, 192 Fs
MCLK = 128, 256 Fs
V
IH
V
IL
V
OH
V
OL
Fs 30
= 25 °C; VA = VD + 5V,VL = 2.375 to
A
0.7xVL - V
0.3xVL V
VL - 1.0 VL - 0.7
0.9 X VL
-
-
-
-
-
-
0.4
0.2
0.4
V V
V
V V
V
-10µA
-10µA
60
-
-
50
100
kHz kHz
3.84 - 25.6 MHz
TBD
40
TBD
40
50 50
50 50
TBD
60
TBD
60
% %
% %
6 DS511PP1
SWITCHING CHARACTERISTICS (Continued)

Figure 1. Serial Audio Port Master Mode Timing

Parameter Symbol Min Typ Max Units
Low Time (Note 9)
RST SCLK Falling Edge to SDOUT Output Valid (DSCK=0) LRCK Edge to MSB Valid SDIN Setup Time Before SCLK Rising Edge SDIN Hold Time After SCLK Rising Edge
Master Mode
SCLK Falling to LRCK Edge SCLK Duty Cycle
Slave Mode
SCLK Period SCLK High Time SCLK Low Time SCLK rising to LRCK Edge (DSCK=0) LRCK Edge to SCLK Rising (DSCK=0)
t
dpd
t
lrpd
t
t
t
mslr
t
sckw
t
sckh
t
sckl
t
lrckd
t
lrcks
ds dh
CS4228A
1- -ms
-50ns
-20ns
-10ns
-30ns
+10 - ns
50 - %
--ns 50 - - ns 50 - - ns 25 - - ns 25 - - ns
Notes: 9. After powering up the CS4228A, RST
SCLK* (output)
t
mslr
LRCK (output)
SDOUT
should be held low until the power supplies and clocks are settled.
LRCK (input)
SCLK* (input)
SDIN1 SDIN2 SDIN3
SDOUT
*SCLK shown for DSCK = 0. SCLK inverted for DSCK = 1.
t
lrckd
t
lrpd
t
lrcks
t
sckh
t
t
dh
ds
MSB
t
sckw
t
sckl
t
dpd
MSB-1

Figure 2. Serial Audio Port Slave Mode Timing

DS511PP1 7
CS4228A

SWITCHING CHARACTERISTICS - CONTROL PORT (TA = 25° C, VA = VD = +5 V,

VL =2.375 to 5.25 V; Inputs: logic 0 = DGND, logic 1 = VL, C
Parameter Symbol Min Max Units
SPI Mode
(SDOUT > 47 kΩ to GND) CCLK Clock Frequency CS
High Time Between Transmissions
CS
Falling to CCLK Edge CCLK Low Time CCLK High Time CDIN to CCLK Rising Setup Time CCLK Rising to DATA Hold Time (Note 10) Rise Time of CCLK and CDIN (Note 11) Fall Time of CCLK and CDIN (Note 11)
Notes: 10. Data must be held for sufficient time to bridge the transition time of CCLK.
11. For F
SCK
< 1 MHz
= 30 pF)
L
f t t
t t t
t
sck csh css
scl sch dsu
dh
t
r2
t
f2
-6MHz
1.0 µs 20 ns 66 ns 66 ns 40 ns 15 ns
100 ns 100 ns
CS
CCLK
CDIN
t
t
css
r2
t
t
scl
t
t
f2
dsu
sch
t
dh

Figure 3. SPI Control Port Timing

t
csh
8 DS511PP1
CS4228A
SWITCHING CHARACTERISTICS - CONTROL PORT (T
VL=2.375 to 5.25 V; Inputs: logic 0 = DGND, logic 1 = VL, C
= 30 pF)
L
= 25° C; VA = VD = +5 V,
A
Parameter Symbol Min Max Units
Two Wire Mode
SCL Clock Frequency Bus Free Time Between Transmissions Start Condition Hold Time (prior to first clock pulse) Clock Low Time Clock High Time Setup Time for Repeated Start Condition SDA Hold Time from SCL Falling (Note 12) SDA Setup Time to SCL Rising Rise Time of Both SDA and SCL Lines Fall Time of Both SDA and SCL Lines Setup Time for Stop Condition
(SDOUT < 47 kΩ to ground)
f t
t
hdst
t
low
t
high
t
sust
t
hdd
t
sud
t
susp
scl buf
t t
-100kHz
4.7 µs
4.0 µs
4.7 µs
4.0 µs
4.7 µs 0 µs
250 ns
r f
4.7 µs
Notes: 12. Data must be held for sufficient time to bridge the 300 ns transition time of SCL.
1 µs
300 ns
SDA
SCL
Stop Start
t
buf
t
hdst
t
t
high
low
t
hdd
t
sud

Figure 4. Two Wire Control Port Timing

Repeated
Start
t
sust
t
hdst
Stop
t
f
t
r
t
susp
DS511PP1 9
CS4228A

ABSOLUTE MAXIMUM RATINGS (AGND, DGND = 0 V, all voltages with respect to 0 V.)

Parameter Symbol Min Typ Max Units
Power Supplies Digital
Analog
Interface Input Current (Note 13) Analog Input Voltage (Note 14) Digital Input Voltage Input Pins
Bidirectional Pins
(Notes 14 and 15) Ambient Temperature (Power Applied) Storage Temperature
Notes: 13. Any pin except supplies. Transient currents of up to ±100 mA on the analog input pins will not cause
SCR latch-up.
14. The maximum over or under voltage is limited by the input current.
15. Bidirectional pins configured as inputs.
VD
VA VL
-0.3
-0.3
-0.3
--±10mA
-0.7 - VA + 0.7 V
-0.7
-0.7
-55 - +125 °C
-65 - +150 °C
-
-
-
-
-
6.0
6.0
6.0
VL + 2.5 VL + 0.7
V V V
V V V
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 (AGND, DGND = 0 V, all voltages with respect

to 0 V.)
Parameter Symbol Min Typ Max Units
Power Supplies Digital
Analog
Interface
Operating Ambient Temperature
VD
VA VL
T
A
4.75
4.75
2.375
-10 25 70 °C
5.0
5.0
-
5.25
5.25
5.25
V V V
10 DS511PP1
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