使用INA293A4采样1mR电阻,当输入电流为1A时,在设计中,输入电流存在波动、平稳两种工况,在这两种工况下,INA293A4输出存在差异,这会导致采样精度超出1%,
从波形上分析,当电流波动时,INA293A4输出超调,导致采样信号偏高,请问有什么办法可以解决这个问题,以此提高采样的精度?
电路如下:
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