CS4220 CS4221
3. TYPICAL CONNECTION DIAGRAM — CS4221
Ferrite Bead
Ω
2
+5V
Supply
+2.7 - 5V
+ 1 µF
0.1 µF
0.1 µF + 1 µF
0.1 µF + 1 µF
21
VA
6
VD
13
Ω
Ω
Ω
Ω
150
150
150
150
VL
20
25
26
AINL+
AOUTL+
AOUTL-
2.2 nF
Analog Filter
Analog Filter
24
23
19
AOUTR+
AOUTR-
AINL-
AINR+
AINR-
17
2.2 nF
CS4221
16
3
2
External
XTI
Clock Input
40 pF
XTO
40 pF
10
11
12
27
18
Eliminate the crystal
SCL/CCLK
SDA/CDIN
AD0/CS
RST
and capacitors when
using an external
clock input
Microcontroller
I2C/SPI
R
s
5
4
9
8
SCLK
LRCK
1
R
s
NC
Audio
DSP
14
15
R
s
NC
NC
Ω
= 500
R
s
SDIN
R
s
* Required for
Master Mode only
SDOUT
28
NC
*
AGND
DGND
7
Ω
47 k
22
Figure 5. CS4221 Recommended Connection Diagram
(Also see Recommended Layout Diagram)
DS284PP3
11
CIRRUS [ CIRRUS LOGIC ]
