Advanced Information
WM8181
RECOMMENDED EXTERNAL COMPONENTS
DVDD
AVDD
15
16
DVDD
AVDD
C1
C2
10
1
2
D G N D
AGND1
AGND2
DVDD
+
AVDD
+
4
VINP
Video
Inputs
5
VINM
C7
C8
WM8181
Clamp
Control
11
D G N D
A G N D
CLAMP
13
12
14
MCLK
VSMP
DOUT
Output Data
Timing
Signals
7
6
VRT
VRB
Reference
Control
3
VREFIN
C3
C 4
References
NOTES: 1. C1 to C6 should be fitted as close to
WM8181 as possible.
C5
C6
2. AGND and DGND should be connected
as close to WM8181 as possible.
A G N D
Figure 6 Recommended External Components Diagram
COMPONENT
REFERENCE
SUGGESTED
VALUE
DESCRIPTION
C1
C2
C3
C4
C5
C6
C7
C8
0.1µF
0.1µF
0.1µF
1µF
Decoupling for DVDD.
Decoupling for AVDD.
High frequency decoupling between VRT and VRB.
Low frequency decoupling between VRT and VRB (non-polarised, optional).
Decoupling for VRB.
0.1µF
0.1µF
10µF
10µF
Decoupling for VRT.
Reservoir capacitor for DVDD.
Reservoir capacitor for AVDD.
Table 2 External Components Description
AI Rev 3.0 January 2000
WOLFSON MICROELECTRONICS LTD
13
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
