I am trying to sense current at high side through a load using MAX4172 IC. I have set Rsense and Rout in such a manner to get 1 uA -> 0.1 V. I am also controlling transistor (common emitter config) to indicate 0 V and 2.5 V under certain current values. Under no load condition i am getting getting 0.4 V which increases slowly and reaches upto 0.7 V then fluctuates.
What could be the possible reasons for voltage fluctuations? Thanks