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| 型号： | E4707B-EDGE4707B |
| 英文描述： | Quad Channel Per-Pin Precision Measurement Unit |
| 中文描述： | 四通道按针脚精密测量单元 |
| 文件页数： | 3/25页 |
| 文件大小： | 194K |
| 代理商： | E4707B-EDGE4707B |
11
Revision 3 / December 18, 2002
www .semtech.com
TEST AND MEASUREMENT PRODUCTS
Edge4707B
Circuit Description (continued)
Short Circuit Protection
The Edge 4707B is designed to survive a direct short circuit
to any legal voltage at the FORCE and SENSE pins, by
virtue of a limited current, which results from the presence
of an external current sense resistor (normally 1 K
to
1M
) in the FORCE path.
Transient Clamps
The Edge 4707B has on-board clamps to limit the voltage
and current spikes that might result from either changing
the current range or changing the operating mode.
Power Supply Sequencing
In order to avoid the possibility of latch-up, the following
power-up requirements must be satisified:
1. VEE
≤ GND ≤ VDD ≤ VCC at all times
2. VEE
≤ All inputs ≤ VCC
The following power supply sequencing can be used as a
guideline when operating the Edge4707:
Power Up Sequence
1. VCC (substrate)
2. VEE/VDD
3. Digital Inputs
4. Analog Inputs
Power Down Sequence
1. Analog Inputs
2. Digital Inputs
3. VEE/VDD
4. VCC (substrate)
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