INA199-Q1: The deviation of GAIN(100V/V)

Hello TQ,

Thanks for using our forum. If I measured a device or a few devices, it likely would not match your device or only a few of your devices if you have many, due to variability in manufacturing. However, we can calculate what the worst case error would be and thereby determine a range for your gain. To calculate this, you need the max gain error (1.5% if the B version of the device), the temperature coefficient (10ppm/C), and the difference in your system temperature from 25C (deltaT = abs(Sys_Temp-25C). From this we calculate the gain error by: 1.5%+(10ppm/C/10000*deltaT). To get the lower bound of the gain range you would calculate (100 - gain error)/100*gain _typical, while the upper bound would be (1 +gain error/100)*gain _typical