i have a problem with the INA155, I have the circuit posted in the schematic. In the bottom part there is the reference use to create the Vref (400mV) on GND1 and at the input pin of the opamp i have a dc voltage to amplify. I have a problem with the circuit because there is an oscillation of this generated by the opamp, i have tried to put a 0ohm instead C5 but i can measure on oscillation on the pin GND1. Why the system enter in oscillation?
Vdd (3.3V) is stable and if i disconnect the ference voltage from the ina155 it not present oscillation but it is stable