1.We want to measure an analog voltage that can be as high as 10V. The analog input has a range of 0 to 5000mV.  It has input resistance to ground of 50Kohm. How can this be done?

2.How many watts of heat will a MOSFET generate when it is fully ON and a current of 100A goes through it. The MOSFET has an RDSon of 2mOhm
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FROM 112.226.136.*

1. 要求不高的话直接两个大点的电阻分压进adc， 后面adc输入阻抗得够高。 要么就先加精密运放跟随一下，再分压。

2. I^2*R不就完了?

这是本科生作业？

【 在 whyphy (whyphy) 的大作中提到: 】
1.We want to measure an analog voltage that can be as high as 10V. The analog input has a range of 0 to 5000mV.  It has input resistance to ground of 50Kohm. How can this be done?

2.How many watts of heat will a MOSFET generate when it is fully ON and a current of 100A goes through it. The MOSFET has an RDSon of 2mOhm
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修改:tom6bj FROM 67.198.237.*
FROM 67.198.237.*

谢谢！应该是这样
【 在 tom6bj 的大作中提到: 】
: 1. 要求不高的话直接两个大点的电阻分压进adc， 后面adc输入阻抗得够高。 要么就先加精密运放跟随一下，再分压。
: 2. I^2*R不就完了?
: 这是本科生作业？
: ...................
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FROM 112.226.136.*

m准确来说，mos的Ron与温度有关系,IxIxR不太严谨
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FROM 221.11.61.*