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LMH6553: Input impedance of single ended P and N pin

Abi Varghese
Prodigy 70 points
Part Number: LMH6553

Can you share  input impedance of single ended signal P and N( not differential impedance)

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  • 0
    TI__Mastermind 19776 points

    Hello Abi,

    I can check and see what I can provide about input impedance, common-mode, in addition to the 15 Ohm differential input impedance spec.

    What circuit or end application would you be using the LMH6553 in?  Do you have additional design questions?

    Best,

    Alec

  • 0 in reply to Alec Saebeler
    TI__Mastermind 19776 points

    Hello Abi,

    The LMH6553 is an FDA (fully-differential amplifier).  FDAs are a different than single-ended output op-amps and have a different input structure: you can think of FDAs as two inverting configuration op-amps which needed to have matched Rg and Rf (gain and feedback) resistors.

    The Rg resistors on each input pin are primarily responsible for setting the input impedance of the FDA.  Your design and Rg resistors will be the important pieces of your solution.

    Best,

    Alec