**Other Parts Discussed in Thread:**INA321, INA2321

This datasheet for this part can also be found using INA321.

My problem is the following:

The formula for the datasheet basically says that the Op-Amp is NOT V(ref) dependent. However, my results say otherwise. We are using this op-amp to amplify the signal of a dual-bridge rotary sensor. The bridges are out of phase. According to the datasheet provided by our sensor, the peak input should be something like 40mV and we are measuring an the Op-Amp output of 3.2 with a Voltage Reference of 2.048V. This is a gain of about 80. However, this is where the discrepancies come in to play. Our R2 is equal to 210K and our R1 is equal to 47K. Based on the datasheet formula, our Gain should be something like 27. Also, because it is a dual bridge and dual op amp, we are using two different voltage references. The first being the already mentioned 2.048 and the second one being 1.8. Now, if the device was not V(ref) dependent, which the datasheet suggests, should not the V(out) of both be the same. In our case, the peaks and troughs are not the same. The output of the lower Vref is slightly lower than that of the higher Vref. This would then tell me that this is indeed Vref dependent. Can someone please look at the datasheet and confirm the equations or perhaps let me know whether or not my gain equations are right or wrong. Thank you.