Hello,
I'm using an INA333 as a load cell amplifier and am not getting the results I expected. From some test measurements, the linear range I am getting is between 0.73 V and 1.85 V, and anything above or below just stays at those values. This is different than what was expected, which is 0.05 V to 3.1 V (see below).
I have the following parameters in my system:
Rg = 100 ohms, V+ = 3.3V, V- = 0V, Vcm = 1.65V, Vref = 0V
I've entered this all into the TI Instrumentation Amplifier Output Voltage vs Common Mode Voltage calculator and the result is below:
Can someone help explain why my output is getting limited? Is there something I'm doing wrong, or does the calculator not match reality for this amplifier?
