ADL5390 input impeadance

Hi there,

I am trying to optimise the input match for this device when used with a third party Quadrature splitter operatinng from 100-900MHz

The data sheet has a plot of the input match with and without the 66.5Ohm shunt resistor used to match to the internal 250ohm shunt resistor.

the supplied S paramters for this device don't match the data sheet see below.

The question is is the Datasheet wrong or are the supplied S parameters wrong or am i doing something wrong with my simulation?

cheers

Dan

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