I want to test a DC current ,the range is 20uA - 50mA, the expected precision for uA is 5% and 1%-2% for mA; I want to choose INA326 with Low-Side Current Shunt Measurement ,the Vs for INA326 is 3.3V in my application, the resistor Rs should be less than 1 ohm since the voltage drop between the Rs should be less than 50mV for my application , the ideal Rs should be 0.5ohm, I have a few questions about INA326:
- the minimum voltage between Rs that INA326 can pick up,take 20uA as an example, if the Rs=0.5 ohm, the Vdrop = 10uV, does INA326 can work fine with such a small Vdrop?
- I supposed that I should choose 2 difference gain to deal with uA and mA, can you advise me the resistor value to set the gain?
- If INA326 can't match my requirement, any other solution can be chosen?
