LMH5401: Simulation circuit results and smoothening

Tool/software:

Hi team, 

 I am using LMH5401 for driving the ADC12DL1500. 

Will this drive the S to D conversion with maximum efficiency? 

Our steady state voltage is 0.8V with +/-400 mVpp. The Vcm is 0V for ADC12DL1500. 

I have tried simulating LMH5401 in Tina-Ti. 

My Input: 
DC Voltage = 0.8 V, G=1, No Input Termination. 
Peak to Peak Voltage = +/- 400mVpp

My Output: 

Why am I not getting sharp edges in rise and fall time? Please give me solution to rectify the error and rise/fall time in the output. 
Do I need to add or reduce any compensation for this? 

 

Thanks 
Aashik S