I'm testing out a simple shunt resistor current sensor circuit based on the schematic provided in the datasheet. My Rs is 1mOhm and Rl is 10kOhm.
When passing a current of 0.50A (verified with another current sensor + ammeter), the voltage across the shunt resistor is 0.5mV but the voltage at Vo is 10mV (expected around 5mV), and when current is increased to 1A, the voltage across shunt resistor is 0.1mV but Vo is ~20mV (expected around 10mV).
I have checked the connections and tried connecting V+ to both an external 5V source and directly to VIN+ but I still get the same results. I have also swapped out to another INA169 (from the same batch) and obtained similar results. Is there anything that I might be missing or I have done wrongly?
Thanks in advance.