WM8731 Wolfson Microelectronics Ltd., WM8731 Datasheet - Page 56

• Manufacturer Part Number: WM8731
• Description: WM8731 : Low Power Audio Codec With Integrated Headphone Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8731
RECOMMENDED EXTERNAL COMPONENTS (28-PIN SSOP)
Figure 55 External Components Diagram
3-wire Interface
2-wire Interface
Audio Serial Data I/F
3-wire or 2-wire
MPU Interface
47k
1.42V - 3.3V
Note:
1. Rmic - The value of this resistor is dependent on the gain setting. Refer to Page 20 for Rmic calculation.
2. Where possible, it is recommended that NPO or COG type capacitors should be used for best performance.
3.3V
5.6k
5.6k
10 F
5.6k
5.6k
220pF
10k
1 F
+
3.3V
680
Rmic
10 F
220pF
220pF
1 F
1 F
0.1 F
0.1 F
28
27
20
+
19
17
18
21
22
23
24
+
1
5
4
6
7
3
LLINEIN
RLINEIN
MICBIAS
MICIN
DACLRC
DACDAT
ADCDAT
ADCLRC
BCLK
MODE
CSB
SDIN
SCLK
DBVDD
DGND
DCVDD
15pF
XTI/MCLK
WM8731
Codec
25
XTO
26
15pF
RHPOUT
CLKOUT
LHPOUT
HPVDD
HPGND
AGND
AVDD
ROUT
LOUT
VMID
14
15
8
11
12
13
9
10
2
16
+
220 F
220 F
+
+
+
1 F
1 F
0.1 F
100
0.1 F
0.1 F
AI Rev 2.3 August 2001
47k
3.3V
3.3V
47k
Advanced Information
47k
47k
100
+
100
10 F
+
10 F
+
10 F
56