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Электронный компонент: CDB4228

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Advance Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 1999
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS4228
24-Bit, 96 kHz Surround Sound Codec
Features
l
Two 24-bit A/D Converters
- 102 dB dynamic range
- 90 dB THD+N
l
Six 24-bit D/A Converters
- 103 dB dynamic range and SNR
- 90 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
Description
The CS4228 codec provides two analog-to-digital and
six digital-to-analog delta-sigma converters, along with
volume controls, in a compact +5/+3.3 V, 28-pin SSOP
device. Combined with an IEC958 (SPDIF) receiver (like
the CS8414) and surround sound decoder (such as one
of the CS492x or CS493xx families), it is ideal for use in
DVD player, A/V receiver and car audio systems sup-
porting multiple standards such as Dolby Digital AC-3,
AAC, DTS, Dolby ProLogic, THX, and MPEG.
A flexible serial audio interface allows operation in Left
Justified, Right Justified, I
2
S, or One Line Data modes.
ORDERING INFORMATION
CS4228-KS
-10 to +70 C 28-pin SSOP
CDB4228
Evaluation Board
I
SCL/CCLK
SDA/CDIN
VD
AOUT1
LRCK
SCLK
SDIN1
SDOUT
S
E
R
IAL
AUDIO
CONTROL PORT
D
I
G
I
T
A
L
FI
LT
ER
S
ANAL
OG
L
O
W
P
A
SS
A
N
D
OUT
P
UT
S
T
AGE
VA
AOUT2
AINL+
AINL-
SDIN2
MCLK
DGND
AOUT3
AOUT4
AINR+
AINR-
LEFT ADC
SDIN3
MUTEC
AD0/CS
RST
FILT
AOUT5
AOUT6
D
I
GIT
AL
F
I
L
T
E
R
S
DAT
A INT
E
RF
ACE
VL
RIGHT ADC
AGND
WIT
H
D
E
-
E
M
P
HASIS
DAC #1
CLOCK MANAGER
MUTE CONTROL
DAC #2
DAC #3
DAC #4
DAC #5
DAC #6
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DIGITAL VOLUME
DGND
AGND
JUL `99
DS307PP1
CS4228
2
DS307PP1
TABLE OF CONTENTS
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
TYPICAL CONNECTION DIAGRAM ................................................................. 11
FUNCTIONAL DESCRIPTION .......................................................................... 12
Overview ................................................................................................... 12
Analog Inputs ............................................................................................ 12
Line Level Inputs ................................................................................ 12
High Pass Filter .................................................................................. 12
Analog Outputs ......................................................................................... 12
Line Level Outputs ............................................................................. 12
Digital Volume Control ....................................................................... 13
Mute Control ............................................................................................. 13
Clock Generation ...................................................................................... 14
Clock Source ...................................................................................... 14
Synchronization .................................................................................. 14
Digital Interfaces ....................................................................................... 14
Serial Audio Interface Signals ............................................................ 14
Serial Audio Interface Formats ........................................................... 14
Control Port Signals .................................................................................. 14
SPI Mode ........................................................................................... 16
I
2
C Mode ............................................................................................ 16
Control Port Bit Definitions ........................................................................ 17
Power-up/Reset/Power Down Mode ......................................................... 17
Power Supply, Layout, and Grounding ..................................................... 18
REGISTER DESCRIPTION ................................................................................ 19
PIN DESCRIPTION ............................................................................................. 24
PARAMETER DEFINITIONS ............................................................................. 28
PACKAGE DIMENSIONS .................................................................................. 29
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 information describes products which are in production, but for which full characterization data 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 efforts to ensure that the information
contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of
any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights
of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of
this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or
otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no
part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical,
photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture
or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing
in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade-
marks and service marks can be found at http://www.cirrus.com.
CS4228
DS307PP1
3
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. I
2
C 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. Right Justified Serial Audio Formats ........................................................ 15
Figure 10.I
2
S Serial Audio Formats .......................................................................... 15
Figure 11.Left Justified Serial Audio Formats .......................................................... 15
Figure 12.One Line Data Serial Audio Format ......................................................... 16
Figure 13.Control Port Timing, SPI mode ................................................................ 17
Figure 14.Control Port Timing, I
2
C Mode ................................................................. 17
CS4228
4
DS307PP1
CHARACTERISTICS AND SPECIFICATIONS
ANALOG CHARACTERISTICS
(Unless otherwise specified T
A
= 25C; VA = +5V, VD = VL = +3.3V;
Full Scale Input Sine wave, 1kHz; Fs = 44.1 kHz BRM, 96 kHz HRM; Measurement Bandwidth is 20 Hz to 20 kHz;
Local components as shown in "Recommended Connection Diagram"; SPI control mode, Left Justified serial for-
mat, MCLK = 256 Fs BRM, 128 Fs HRM, SCLK = 64 Fs)
Notes: 1. Referenced to typical full-scale differential input voltage (2 Vrms).
2. Filter characteristics scale with output sample rate.
3. The analog modulator samples the input at 5.6448 MHz for an output sample rate of 44.1 kHz. There is
no rejection of input signals which are multiples of the sampling frequency (n 5.6448 MHz 20.0 kHz
where n = 0,1,2,3...).
4. Group delay for Fs = 44.1 kHz, t
gd
= 15/44.1 kHz = 340
s. Fs = sample rate.
Specifications are subject to change without notice
Base Rate Mode
High Rate Mode
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Units
Analog Input Characteristics
- Minimum gain setting (0 dB) Differential Input; unless otherwise specified.
ADC Resolution
Stereo Audio channels
16
-
24
16
24
Bits
Total Harmonic Distortion
THD
-
0.003
-
-
0.003
-
%
Dynamic Range
(A weighted)
(unweighted)
TBD
-
102
99
-
-
TBD
TBD
102
99
-
-
dB
dB
Total Harmonic Distortion + Noise -1dB (Note 1) THD+N
-
-90
TBD
-
-90
TBD
dB
Interchannel Isolation
-
90
-
-
90
-
dB
Interchannel Gain Mismatch
-
0.1
-
-
0.1
-
dB
Offset Error (with high pass filter)
-
-
0
-
-
0
LSB
Full Scale Input Voltage (Differential):
5.66
5.66
Vp-p
Gain Drift
-
100
-
-
100
-
ppm/C
Input Resistance
10
-
-
10
-
-
k
Input Capacitance
-
-
15
15
pF
A/D Decimation Filter Characteristics
Passband
(Note 2)
0.02
-
20.0
0.02
-
40
kHz
Passband Ripple
-
-
0.01
-
-
0.05
dB
Stopband
(Note 2)
27.56
-
5617
66.53
-
5578
kHz
Stopband Attenuation
(Note 3)
80
-
-
45
-
-
dB
Group Delay
(Note 4)
t
gd
-
15/Fs
-
-
15/Fs
-
s
Group Delay Variation vs. Frequency
t
gd
-
-
0
-
-
0
s
High Pass Filter Characteristics
Frequency Response: -3 dB
(Note 2)
-0.13 dB
-
-
3.4
20
-
-
-
-
3.4
20
-
-
Hz
Hz
Phase Deviation
@ 20 Hz
(Note 2)
-
10
-
-
10
-
Degree
Passband Ripple
-
-
0
-
-
0
dB
CS4228
DS307PP1
5
ANALOG CHARACTERISTICS
(Continued)
Notes: 5. 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 0.4535Fs and the stopband edge is 0.5465Fs.
6. Digital filter characteristics.
7. Measurement bandwidth is 10 Hz to 3 Fs.
Specifications are subject to change without notice
Base Rate Mode
High Rate Mode
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Units
Analog Output Characteristics
- Minimum Attenuation, 10 k
, 100 pF load; unless otherwise specified.
DAC Resolution
16
-
24
16
24
Bits
Signal-to-Noise/Idle Channel Noise
(DAC muted, A weighted)
TBD
103
-
TBD
103
-
dB
Dynamic Range
(DAC not muted, A weighted)
(DAC not muted, unweighted)
TBD
-
103
100
-
-
-
-
103
100
-
-
dB
dB
Total Harmonic Distortion
THD
-
0.003
-
-
0.003
-
%
Total Harmonic Distortion + Noise
THD+N
-
-90
TBD
-
-90
-
dB
Interchannel Isolation
-
90
-
-
90
-
dB
Interchannel Gain Mismatch
-
0.1
-
-
0.1
-
dB
Attenuation Step Size
(All Outputs)
TBD
0.5
TBD
TBD
0.5
TBD
dB
Programmable Output Attenuation Span
TBD
-90.5
-
TBD
-90.5
-
dB
Offset Voltage
-
10
-
-
10
-
mV
Full Scale Output Voltage
TBD
1.3
TBD
-
1.3
-
Vrms
Gain Drift
-
100
-
-
100
-
ppm/C
Analog Output Load
Minimum Load Resistance:
Maximum Load Capacitance:
-
-
10
100
-
-
-
-
10
100
-
-
k
pF
Combined Digital and Analog Filter Characteristics
Frequency Response
10 Hz to 20 kHz
0.1
0.1
dB
Deviation from Linear Phase
-
0.5
-
-
0.5
-
Degrees
Passband: to 0.01 dB corner
(Notes 5, 6)
0
-
20.0
0
-
40
kHz
Passband Ripple
(Note 6)
-
-
0.01
-
-
0.01
dB
Stopband
(Notes 5, 6)
24.1
-
-
56
-
-
kHz
Stopband Attenuation
(Notes 4, 7)
70
-
-
65
-
-
dB
Group Delay (Fs = Input Word Rate)
tgd
-
16/Fs
-
-
16/Fs
-
s
Analog Loopback Performance
Signal-to-noise Ratio
(CCIR-2K weighted, -20 dB FS input)
CCIR-2K
-
TBD
-
-
TBD
-
dB