问题请见附件 谢谢
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INA331供电是单电源供电5V,因为INA331的Ref引脚接的是OPA336的输出端,而OPA336的做了个电压跟随,输出等于输入为Vr=2.5V,又因为INA331
的Vref=1/2Vs ,所以INA331的供电电压是5V。