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LMH0302: How to improve eye diagram

user4773196
Prodigy 705 points
Part Number: LMH0302
Other Parts Discussed in Thread: LMH0397, LMH0387

Hi Team,

Please suggest how to adjust LMH0302 to improve eye diagram?

Ex. Adjust RREF, or any other way?

Thank you.

  • 0
    TI__Guru* 88915 points

    Greetings,

    If you are trying to increase output amplitude then you can reduce RREF value down to 665 ohm.

    On the other hand, if you trying to improve eye diagram quality, then please below note pcb layout. Note right hand side where we have 75-ohm pull ups in parallel with one another. If you need to improve eye diagram further, then please consider LMH0387 or LMH0397 devices. These parts exhibit much better eye quality.

    Regards,, Nasser