I used this OP97 op-amp to make a simple unity-gain feedback circuit. I would expect the output in this case to follow the input with very little error, however the output is actually measured at \$ 2.7 \text{ V}\$ rather than \$ \approx 3.1 \text{ V}\$ as expected.
This seems like a fairly large error for this buffer. I checked the data sheet and it appears that I'm operating the device well-within the allowable supply range, so I'm not sure what the error may be.
simulate this circuit – Schematic created using CircuitLab
Best Answer
Figure 1. From the datasheet.
Note that when running on a ±15 V supply that the inputs can be taken to within 1 or 1.5 V of the supply rails.
If that deviation remains constant at ±4 V then you could expect the inputs to work in the range ±2.5 V to ±3 V. I can't see where you could work that out from the data sheet.