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LMH1297EVM: SDI_IO and SDI_OUT

Joshua Corley
Prodigy 10 points
Part Number: LMH1297EVM
Other Parts Discussed in Thread: LMH1297

On this line driver, is it possible to have input for SDI_IO and have the output on the SDI_OUT along with having the the SMA ports working with input and output. If so how do I go about setting up the board jumpers to make this work?

Thank you.

  • 0
    TI__Guru* 88815 points

    Hi Joshua,

    The mode you are describing is LMH1297 equalizer mode with loop through output enabled. To enable this mode, EQ/CD_SEL should be pulled low and SDI_OUT _SEL should be pulled low as well. Please note, in this mode 100-Ohm input signal on IN0 would be ignored. 100-ohm input signal is used mainly in cable driver mode. 

    Regards,, Nasser