This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

运放的共模抑制比和电源抑制比对输出精度的影响

1、很多人用运放选共模抑制比越大越好,考虑到成本,我想计算一下理论值到底符不符合,比如我采分流器上的电流±74A,Gain=0.0335,共模输入电压有5V,电流精度要满足0.05%,假如运放的共模抑制比为120dB,单纯考虑共模抑制比的影响电流60A,运放输出值理论为Vo=0.0335*60,该怎么计算输出的误差呢?Gain取大于1和小于1影响是怎么样的?

2、电源抑制比对精度又有什么样的影响?

请帮忙解决我这个困惑的问题,谢谢!