Other Parts Discussed in Thread: INA226
I am using INA210 in several places of my design normally when common mode voltage on IN+, IN- is lower than V+=5V all these circuits works great.. In one place however I use INA210 with common mode volage of 12V while V+=5V.
In this case I have observed extremally high IN+ current =550uA while IN- current is only 41uA. My output (OUT) saturates to 5V. I am aware that bias current is asymetrical but was under impression it does not go to hundreds of uA
Is my observation correct , are you expecting such a big difference, and big value of IN+ bias current?
On the very same shunt resistor (effectively in parallel with INA210) I also have INA226 doing remote sensing and once I isolate INA 210 ( which primary function is to provide single ended voltage for multimeter measurements ) INA 226 works as a charm with very small bias currents.
Do you expect INA226 to behave much better .
I expect you would say that 550uA of bias is possible but in such a case I will have to give up on INA 210 so is it ok to leave it's inputs floating ?
Thank you very much for your help