CS4226_04 Datasheet, PDF (10/37 Pages) Cirrus Logic – Surround Sound Codec

CS4226
+5V
Supply
Ferrite Bead
+ 1 µF
0.1 µF
2.0 Ω
+ 1 µF
0.1 µF
To Optional
Input and
Output Buffers
1 µF
16
+
19
VA+
CMOUT
40
VD+
21
AOUT1
ANALOG
FILTER
10 µ F * 14 _AIN1L
22
AOUT2
ANALOG
FILTER
10 µ F * 13 _AIN1R
10 µ F * 11 _AIN2L/FREQ0
CS4226
23
AOUT3
ANALOG
FILTER
10 µ F * 12 _AIN2R/FREQ1
10 µ F * 10 _{AIN3L/AUTODATA}
24
AOUT4
ANALOG
FILTER
10 µ F * 9 _AIN3R/AUDIO
10 µ F _* 15 _AINAUX
25
AOUT5
Digital
Audio
Source
R_S
R_S
RS
100 pF
R_S
100 pF
R_S
100 pF
27 _DEM
2
HOLD/RUBIT
42 _RX1
†
1 _DATAUX/RX4
†
44
LRCKAUX/RX3
†
R_S
100 pF
43 _SCLKAUX/RX2
†
Mode
Setting
8
PDN
7 _I2C/SPI
RS = 50 Ω
RD = 475 Ω
All unused digital inputs
should be tied to DGND.
All unused analog inputs
should be left floating.
* Optional if analog inputs
biased to within 1% of
CMOUT
AGND1, 2 DGND1, 2
18 20 41 39
FILT
17
† Only needed when inputs
are used for S/PDIF.
Loop Current
Normal High
C_FILT 15 nF
R_FILT 43 kΩ
C_RIP 1.5 nF
180 nF
3.3 kΩ
18 nF
R_FILT
CFILT
26
AOUT6
3
SCL/CCLK
4
SDA/CDOUT
6
AD0/CS
5
AD1/CDIN
34
SDIN1
33
SDIN2
32
SDIN3
36
SDOUT1
35
SDOUT2
37
LRCK
38
SCLK
31
CLKOUT
30
OVL/ERR
XTO XTI
29 RX2** 28
RX1**
C1** C2**
CRIP
Figure 1. Recommended Connection Diagram
ANALOG
FILTER
ANALOG
FILTER
Microcontroller
R_D
R_D
R_D
RS
R_S
Audio
R_S
DSP
R
S
**
256,
384,
1xFs _512xFs
C1 40 pF 40 pF
C2 10 pF 40 pF
RX1 300 kΩ short
RX2 _{10 MΩ} open
10
DS188F4