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MC33161 用户编程技术手册 - ON Semiconductor（安森美）
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ON Semiconductor（安森美）
描述:
通用电压监测器 Universal Voltage Monitors
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MC33161数据手册
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AND8426/D
http://onsemi.com
6
Validation by Laboratory Evaluation
Recall the resistor sets R1 to R4
R1 = 3.702k
R2 = 3k
R3 = 2.803k
R4 = 100k
At laboratory, the following resistor values are used:
R1 = 3.6k + 100 W = 3.70k
R2 = 3k
R3 = 2.7k + 100 W = 2.80k
R4 = 100k
All resistors are tolerance 1%
Figure 9. Scope Capture (V
IN+
= 2.989 V, V
IN−
= 2.722 V, DV
IN
= 2.989 − 2.722 = 0.267 V)
So the evaluation result in laboratory bench is also consistent with theoretical calculation.
Cautions For Selection of Resistor R3 to R4
1. R3 should be used lower than 15k, otherwise there will have some non linear behavior with either V
IN+
or
DV
IN
/V
IN+
2. R4 should be used higher than 100k.
The following charts provide V
IN+
and DV
IN
/V
IN+
versus R3 for R4 = 300k and R4 = 500k. Those may be used if DV
IN
/V
IN+
are too small for R4 = 100k configuration.
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