We have LTC6269-10 IC as TIA in one of our electro optic circuits followed by a high speed LTC6754 comparator we want to do Signal integrity analysis on the design but unable to because of un availability of spice and ibis models of mentioned ICs
What simulator are you using? The models are available on LTspiceXVII. You can download LTSpice here.
Do you mind sharing what applications are you working on?