Other Parts Discussed in Thread: MSP430F149
I am using INA169NA/3K chip current measurement IC. I am getting current sense data in my ADC (12 bit) MSP430F149 through that chip. I need to calibrate offset and gain errors of INA169NA chip as all chips do have some errors in them and external components also affect it as well.
My loads are various lamps of various watts, but I am trying to calibrate it using a 10 OHM resistor, so I am trying to get, my board supply 12V to the load. so it consumes 1.2A. There are two modes as per load resistor, low gain and high gain, I want to measure offset and gain in both regions.
Now, I am calculating gain, system voltage: 3
is this the correct way of calibration?