AD9609 bandwidth limitations


i am reviewing the AD9609 and i see that the datasheet specifies the FPBW as 700MHz but all of the characterization plots are only showing up to 200MHz performance. 

My question would be, is there any limitation to pushing the analog input bandwidth to for example 600MHz in a single ended configuration?  As well does it need to be a differential input signal? 

Can you provide some guidance as to the performance i could expect at 600MHz analog bandwidth sampling with -80 part (i.e. 80MSPS) IF.