ADA4937 Load

Hi,

I'm simulating the ADA4937 Differential Ampliifier that I will use as ADC driver for the AD9255, with and without output filter.

It seems that adding the output filter at tha ADA4937 leads to a huge distortion of the output signal.

WHY?

Does the ADA4937 requires some specific limited load?

Would there be some problem in spice models?