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AMC1200: 关于采用AMC1200进行高电压采样的问题?(共模电压、输入阻抗、偏移误差)

Part Number: AMC1200

1、共模电压问题:

上面图一和图二测试输出结果是一致的,但是图一方式是否正确?两种方式是否是只要满足A\B点电压参考各自GND1满足-0.16-VDD1电压范围就可以?

2、输入阻抗问题:

计算采样电阻时候,是否要将内部等效阻抗28K一并进行并联计算Rsense=600//(10+28k+10)=587.4?

3、偏移误差问题:

AMC1200是否需要考虑偏移误差问题,增加Rx电阻?