For a particular case, I'm looking for S Parameters (S11 actually) of AD8307 in mixed mode to have an overview of the input impedance in differential mode driving.Is it possible to have a touchstone file with S11 in this way?
The S11 file is on the AD8307 device home page. Here is the link:
Hello John_C and thank you for quick response!I downloaded already the S11 from the page that you mentioned, but this parameter was given with an input pin (INM) referenced to the GND. My concern is if there is a possibility to have a S11 file which was given in differential mode of input of the AD8307 (INM not referenced to GND).
The AD8307 does not have an evaluation board, which would make a differential S11 measurement very difficult to obtain.
I would suggest looking at the AD8310. It is a very similar part to the AD8307, but with a better output stage and it has an evaluation board which would enable the differential S11 measurement.
Thank you for answerer. I had a look to the AD8310 datasheet and after all I made a quick simulation in ADS to see how the inputs looks like for both AD8307 and AD8310. The S Parameters was taken from the Analog Devices web page. In both cases I made a frequency sweep from 10MHz to 1GHz (that's because, for AD8307, S Parameters was given in that range instead of 300KHz to 2GHz as it was for AD8310). The result of the simulation looks quite bad for AD8310 after 500MHz, so my conclusion is: they (AD8307 and AD8310) aren't so similar regarding input stage and I prefer still to use AD8307.
Did anyone else try to measure S parameters of the input of AD8307 in mixed mode?