WM8214 Datasheet, PDF (34/36 Pages) Wolfson Microelectronics plc – 40MSPS 16 BIT CCD DIGITISER

WM8214
Production Data
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
DVDD1 DVDD2
3 _DVDD1
10 _DVDD2
C1
C2 AVDD
21 _AVDD
C3
DGND
Video
Inputs
AGND
1 _RINP
28 _GINP
27 _BINP
DGND ⁸
AGND1 ²²
AGND2 ²
AGND
VRT ²⁴
VRX ²⁵
VRB ²³
C6 C7
C4 C5
C8
Timing
Signals
Interface
Controls
26 _VRLC/VBIAS
C9
WM8214
AGND
7 _MCLK
5 _VSMP
6 _RSMP
12 _SCK
11 _SDI
9 _SEN
OP[7]/SDO ²⁰
OP[6] ¹⁹
OP[5] ¹⁸
OP[4] ¹⁷
OP[3] ¹⁶
OP[2] ¹⁵
OP[1] ¹⁴
OP[0] ¹³
4 _OEB
AGND
DVDD1 DVDD2
AVDD
Output
Data
Bus
+ ^C10 + ^C11
+ ^C12
DGND
AGND
NOTES: 1. C1-9 should be fitted as close to WM8214 as possible.
2. AGND and DGND should be connected as close to WM8214 as possible.
Figure 25 External Components Diagram
RECOMMENDED EXTERNAL COMPONENT VALUES
COMPONENT
REFERENCE
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
SUGGESTED
VALUE
100nF
100nF
100nF
10nF
1µF
100nF
100nF
100nF
100nF
10µF
10µF
10µF
DESCRIPTION
De-coupling for DVDD1.
De-coupling for DVDD2.
De-coupling for AVDD.
High frequency de-coupling between VRT and VRB.
Low frequency de-coupling between VRT and VRB (non-polarised).
De-coupling for VRB.
De-coupling for VRX.
De-coupling for VRT.
De-coupling for VRLC.
Reservoir capacitor for DVDD1.
Reservoir capacitor for DVDD2.
Reservoir capacitor for AVDD.
Table 9 External Components Descriptions
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PD, Rev 4.4, August 2008
34