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參數資料
| 型號： | W6662CF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 消費家電 |
| 英文描述： | CCD(Correlated Double Sampler)/CIS(Contact Image Sensors) Analog Front End Signal Processor.(耦合采樣器／接觸圖象傳感器模擬前端信號處理器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 10 X 10 MM, 2 MM HEIGHT, PLASTIC, QFP-48 |
| 文件頁數： | 17/19頁 |
| 文件大小： | 272K |
| 代理商： | W6662CF |
Preliminary W6662CF
Publication Release Date: December 1998
- 17 -
Revision A1
8.2. Decoupling Circuit
Figure 8-2 shows the decoupling capacitor request on the W6662 system board to reduce noise and
distortion, 0.1
μ
F capacitor must as near to the pin as possible. The analog power source and digital
power source (DRVDD) had better regulated by different regulator, the analog ground and digital
ground (DRVSS) must separated and must connected only at one point near the power supplier. All
the analog power pins must connected as short as possible and all the analog ground pins must
connected as short as possible on the PC board. Termination resistor must added near the W6662
chip on the CDSCK1, CDSCK2 and ADCCLK input pin.
Fig. 8-2 Decoupling Capacitor Circuit of W6662 Device.
W6662
(Analog Part)
(Digital Part)
VRDT
VRDT
0.1uF
0.1uF
0.1uF
VDRB
VRDB
10uF
+
VRDC
0.1uF
VREF
0.1uF
1uF
+
CISREF
0.1uF
0.1uF
10uF
+
AVDD
AVSS
AVDD
(other pins are not shown)
10uF
+
0.1uF
DRVDD
DRVSS
DRVDD
(near power source)
CDSCK1
CDSCK2
ADCCLK
R
term
R
term
R
term
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