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參數(shù)資料
| 型號(hào)： | CH7002D |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Scalable VGA to NTSC/PAL Encoder |
| 中文描述： | 可擴(kuò)展顯卡至NTSC / PAL編碼器 |
| 文件頁數(shù)： | 34/36頁 |
| 文件大?。?/td> | 199K |
| 代理商： | CH7002D |
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CHRONTEL
CH7002D
34 201-0000-029 Rev6.1, 8/2/99
Optional Controls and Circuits
Full Scale Input Range Adjustment
The full-scale input range of the CH7002 may be modified from its nominal value of 750 mV. This is accomplished
by forcing a DC voltage into the VREF1 pin, thus overriding the internally-generated reference voltage. The simple
circuit shown below allows adjustment of the VREF1 voltage, over approximately a 1.0 to 2.5 volt range.
Figure 28: Full-Scale Input Range Adjustment
Electrical Specifications
Notes:
1
Stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device.
These are stress ratings only. Functional operation of the device at these or any other conditions above those
indicated under the normal operating conditions section of this specification is not recommended. Exposure to
absolute maximum rating conditions for extended periods may affect reliability.
2
The device is fabricated using high-performance CMOS technology. It should be handled as an ESD-sensitive
device. Voltage on any signal pin that exceeds the power supply voltage by more than +0.5V can induce
destructive latchup.
3
The temperature assumes a still environment with no active cooling.
Table 8. Absolute Maximum Ratings
Symbol
Description
Min
- 0.5
Typ
Max
7.0
Units
V
V
Sec
°
C
°
C
°
C
°
C
W
VDD relative to GND
Input voltage of all digital pins
Analog output short circuit duration
Ambient operating temperature
Storage temperature
Junction temperature
Vapor phase soldering (one minute)
Maximum power dissipation
GND - 0.5
Vdd + 0.5
TSC
TAMB
T
STOR
T
J
T
VPS
PMAX
Indefinite
- 55
- 65
70
150
150
220
1.9
AVDD
CH7002
0.1uF
Vref1
AGND
2.7K
1.2K
+5 V
2K
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