I'm using an opamp to amplify a 3.5 Vpp (peak to peak) 10 kHz sinewave which seems fine apart from a tiny noise mostly visible at its' peaks which does not particularly concern me much. The blue sinewave is the input and the output is the red sinewave amplified at 6.7 Vpp. There is a distortion and that is at both no-load and loaded conditions. This opamp is meant to be used as a resolver primary coil driver which is the case of my application. The distortion is something that worries me because it could affect the accuracy of the resolver-to-digital converter. My question is what can I do to minimize the distortion as I do not see any reason for it. The datasheet refers to zero crossover distortion and secondly the opamp is "obliged", to a certain extend, to provide an output signal based on the gain factor which is not so great that could drop the BW so low to affect amplification ratio. The BW is 600 kHz and the signal being amplified is 10 kHz.
Can anybody make any suggestions?