I need IBIS Model for the following part numbers, in order to perform SI Analysis
You've posted on a wrong community forum.
But here are the links where you should be posting your queries.
1. For ADM1270 post it on Power By Linear.2. For ADR440 post it on Voltage References3. For ADG721 post it on Switches/Multiplexers.Best Regards,Goz
Kindly help me to get the models at the earliest
IBIS models are only used for modelling digital pins. Since the ADR444 is a voltage reference with no digital pins we do not provide an IBIS model for this product.
Regarding ADM1270, we do not have IBIS models. The ADM1270 does not have a digital bus, so there are no SI concerns.
If you have specific questions about hook-up or routing, please send me your schematic and I will be happy to review it.