Hello,
I tried to measure a current throw a shunt with a resistance of 100µOhms. The GND is galanic isolated from the high voltage. The supply voltage is 5V. I would filter some noise out of the measured voltage with a low pass filter. But if the low pass resistor R6 is connected the output voltage is everytime 5V. I think it's because the INA284 has 25µV input current. How I can change the schematic to suppress this effect. When I replace R6 with a short circuit it has a offset of few amperes. The shunt resistor is between P$1 and P$2 on the right connector.
Attached you can find my schematic. If you have other improvements I would be pleased.
Martin