2 Operational Amplifier Limits

For all operational amplifiers, the output is limited by the power rails. For the OPA module, it is single-supply, meaning that it can only utilize VDD and VSS for power. If a non-inverting amplifier has a predicted output in excess of VDD, then the output will be limited to the upper output range. The same situation holds from an output less than VSS, with the output clamped at the lower output range.

This assumes that both inputs are within the power rails of VDD to VSS. For example, if a negative voltage (VIN-) was applied in an inverting configuration such that the output was within the valid area, the device would be damaged since VIN- is not within the specified I/O pin limits or within the power rails of the amplifier.

The electrical specifications section of the device data sheet for the operational amplifier states how close to VDD or VSS the output can reach.
Important: The OPA module inputs have the same limitations as general purpose I/O. Inputs must be kept within the absolute maximum ratings, both for expected performance and part operation. Refer to the “Electrical Specifications” chapter in the device data sheet for details.