VOPP is the peak-to-peak output voltage swing that can be obtained without clipping or saturation. Peak-to-peak swing may be limited by loading effects. Operational amplifier frequency capability, load resistance, and power supply used. Load resistances given on the data sheet are usually 2 kOhm or 10 kOhm.
With load resistances of 2 kOhm or less, the output decreases due to current limiting. Normally, this will not damage the operational amplifier as long as the specified power-dissipation limits of the package are not exceeded. However, the open-loop gain will be reduced because of excessive loading.