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OPA2277UA差分输入转单端输出

Other Parts Discussed in Thread: OPA2277, INA133, INA152, INA143, INA159, OPA2107

差分输入5V直流电压,经过OPA2277后转成单端,VO=4.95v,损失了50mV,请问是什么原因导致的?如何确认问题根源?