Tool/software:
Hello team,
What is the input impedance for IN+ and IN- ?
My customer tested and found 50uA for IN+ and IN- totally, due to the sensor is connected to KL30, so we need to confirm the normal current range for INA180 IN+ and IN-.
The current design in customer board is as below:
Regards,
Daniel Wang
Hello Daniel,
This is specified as the "input bias current" in the datasheet and other documentation and can be found in the electrical characteristics table of the datasheet as well as in the typical characteristic plots of the datasheet.
Here is the curve for the INA180-Q1:
This is for each pin, so based on this I would expect that the device was operating somewhere around 5V common mode. The input bias current for this device depends on the common mode voltage at the input pins, as can be seen here.
Let me know if you have any more questions,
Levi DV
