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  1. ADA4817-1
    Production
    Product
    Low Input Bias Current Op Amps (≤100 pA)
    Single, Low Noise, 1 GHz FastFET Op Amplifier
    ADA4817-1

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  2. ADA4807-1
    Recommended for new designs
    Product
    High Speed Op Amps (Bandwidth ≥ 50MHz)
    3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier
    ADA4807-1

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  3. ADA4897-1
    Recommended for new designs
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    Low Noise Op Amps (≤ 10nV/√Hz)
    1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers
    ADA4897-1

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    1. ADA4817-1ARDZ in a transimpedance amplifier phase shift

      Forum Thread
      Answered
      Operational Amplifiers
      18 December, 2017
      We use the ADA4817-1ARDZ in a transimpedance amplifier. The TIA bandwidth is modest (~100 kHz) but the transimpedance is high, about 10 MV/A. We see differences in the TIA phase shift which appear to depend on the lot number of the ADA4817. What might cause this dependence? Thanks!

    2. RE: ADA4817-1ARDZ in a transimpedance amplifier phase shift

      Forum Reply
      Operational Amplifiers
      29 March, 2018
      Hi David, Your observations sound similar to mine. We don't have ground traces under our pair of feedback resistors so our stray capacitances are higher, but we seem to have at least 0.05 pF of feedback capacitance we can't explain by layout or SMT resistor strays. We …

    3. RE: ADA4817-1ARDZ in a transimpedance amplifier phase shift

      Forum Reply
      Operational Amplifiers
      28 March, 2018
      Hi Bernard, Did you ever get to the bottom of this? I'm possibly limited by inherent feedback capacitance of the ADA4817-1ACPZ in a similar high-gain transimpedance amplifier as well (ADA4817-1 output -> inverting input capacitance), but any equalization techniques would require manual tuning if the capacitance varies …

    4. RE: ADA4817-1ARDZ in a transimpedance amplifier phase shift

      Forum Reply
      Operational Amplifiers
      20 December, 2017
      Hello Jino, thank you for the response. The top graph shows the waveforms we see for amplifiers from four different ADA4817 lots. Our test light source is a laser with triangle-wave modulation at 10 kHz. Our amplifier uses the ADA4817 in a standard TIA, with the TIA feedback resistor …

    5. RE: ADA4817-1ARDZ in a transimpedance amplifier phase shift

      Forum Reply
      Operational Amplifiers
      18 December, 2017
      Hi Bernard, How large is the difference? The response of ADA4817-1ARDZ should exhibit the same performance independent of the lot ID, as you mentioned. Could you provide screenshots or details of the problem you have encountered? Regards.

    6. RE: ADA4807

      Forum Reply
      Other Products (EN)
      12 January, 2016
      Hi and thank you for the feedback I tested the ADA4807-1ARJZ and it worked just fine. The same footprint did not require a new layout. I appreciate the feedback from you all, thank you Regards Konta

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