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LMH3401 S parameters

Other Parts Discussed in Thread: LMH3401

Hello Ti community , 

I am evaluating lmh3401 for RF applications, please someone can provide me the S-parameter? maybe, if possible in differential in to differential out condition?

  • Hi Matteo,

    Here are S parameters with a 37.5 Ohm input resistor to match the inputs to 100 Ohms differential as well as 40 Ohm output resistors to match the output to 100 Ohms differential. This is tab delimited text, so to open it in Excel you need to open it and select "delimited" and check the "tab" box. 

    You can get the actual impedances by subtracting 75 Ohms from the input impedance numbers (Sdd11) and by subtracting 80 Ohms from the output impedance numbers (Sdd22). 

    Regards,

    Loren

    diff37.5rin5vsm12in.txt

  • Hi Loren,

    You wouldn't have any 4-port scattering parameters for the LMH3401, would you? I'm hoping that the reference planes are at the amplifier's pins (IN-, IN+, OUT-, OUT+) instead of outside the matching resistors. I'd like to be able to choose my own matching resistors and derive my own mixed mode scattering parameters. Or should I be able to retrieve that from the scattering parameters you already provided?

    Thanks, Jeff