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.

INA128放大倍数为什么被限制了?

用IAN129做了一个放大电路,希望放大倍数能达到100倍,单独供给+5v,-5v电源,原来可以正常使用,同一批次的PCB板,前两块焊出来正常,可以将30mv的电压放大到3v,可是第三块和第四块放大倍数好像被限制了,最大电压也只有几十毫伏?求解