INA231 we test the part with EVM and sense resistor on the board
but the accuracy is worse when current higher than 1A
1A load with INA231 test 1.012A
2A load with INA231 test 2.075A
3A load with INA231test 3.106A
the fileter resistor is 10ohm capcitor is 0.1uF.
Hi Ianjie,
Can you let us know what your setup looks like so we can try to replicate this in the lab with the EVM?
1. Shunt resistor value and tolerance
2. Configuration Setup (Let us know the settings you have in the EVM GUI, all white areas of the screenshot below.
3. Power Supply resolution. How are you determining your ideal current? How many digits of precision it has? Are you measuring with a current meter to make sure you are sending the expected current?
4. Can you let us know what is the differential voltage on the input pins of the INA on each case? Please measure the voltage at the pins of the device and also at the shunt. Please provide both values to us.
Regards
