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Use an instrumentation amplifier on a 2MHz balanced signal

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  • Use an instrumentation amplifier on a 2MHz balanced signal

    hi, hoping someone here can help me!I'm trying to use a AD623 instrumentation amplifier on a 2MHz balanced signal. the parasitic capacitance of my IA is 10pF or just under 8k ohm at 2MHz... the equivalent series input impedance circuit is 0.06 -7957i according to what I calculated...I need the highest possible input impedance, so to cancel out the parasitic C may I put an inductor in parallel with it? I ask cause I haven't found schematics where that's done and google search hasn't led me to relevant articles, yet..cheers

  • #2
    I think you would get better luck if you visit an Analog Devices discussion group - check their website for support links.

    https://duckduckgo.com/?q=Analog+Dev...=v231-1&ia=web

    Good luck, sir.

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    • #3
      I wouldn't use that part, it's only rated for 800kHz at unity gain

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      • #4
        Originally posted by devnull View Post
        I wouldn't use that part, it's only rated for 800kHz at unity gain
        Agreed. If this is a crucial application you'll want maybe a 20MHz unity gain BW part, at minimum.
        Francis

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