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  • OPA859: NC pin

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    Other Parts Discussed in Thread: OPA859 Hello, I have questions about NC pin of OPA859. OPA859 pin2 is NC, means not connect, datasheet explain user not connect this pin to any circuit. But nc has a little ambiguous meaning for user, is nc means opa859…
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  • OPA859: FB pin of OPA859

    Resolved
    Part Number: OPA859 Hello, I have two questions FB pin of OPA859. 1) At "6 Pin Configuration and Functions" of datasheet, FB pin is I (input). However, in Figure 50, the FB pin is connected to the output of the amplifier, so it looks like…
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  • OPA859-Q1: What are "Common-mode input capacitance" and "Differential input capacitance"?

    Resolved
    Part Number: OPA859-Q1 Other Parts Discussed in Thread: THS3062 Hi team, What are "Common-mode input capacitance" and "Differential input capacitance"? Do you have equivalent circuit model for explaining them? Transimpedance amplifier…
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  • WEBENCH® Tools/OPA859: PSPICE model for OPA859

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    Part Number: OPA859 Other Parts Discussed in Thread: TINA-TI Tool/software: WEBENCH® Design Tools Hi, I would like to simulate OPA859 with PSPICE for TI. I searched for PSPICE for TI but couldn't find OPA859. Is there a PSPICE model? ikuo
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  • WEBENCH® Tools/OPA859: Why is the Gain Bandwidth required in the Filter Design Tool Always so high?

    Resolved
    Part Number: OPA859 Tool/software: WEBENCH® Design Tools I'm trying to design to a a bandpass filter with the filter design tool and I'm struggling to understand a few things from the design. The design parameteres required is a filter with a:…
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  • OPA859: Input common mode capacitance

    Resolved
    Part Number: OPA859 Hi, I am working on a differential probe with a the first opamp stages being OPA859's. The input common mode capacitance is said to be 0.62pF. I could not find any reference regarding any change of that capacitance based on biasing…
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  • TINA/Spice/OPA859: Weird behaviour of output during power down

    Resolved
    Part Number: OPA859 Other Parts Discussed in Thread: TINA-TI , Tool/software: TINA-TI or Spice Models Hi, I was trying to confirm the impedance of the OPA859 during a power down condition. It turns out that the "high impedance" stated in the datasheet…
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  • RE: OPA855: How to design a TIA with OPA855?

    Hello, Thank you for the additional scope shots. That is a very small input capacitance, can you remove the feedback capacitor. The parasitic from the board should be enough in this case to stabilize the amplifier. For this type of application, I wouldn…

  • OPA855-Q1: Is it high impedance output in the case "power down connection" is on low logic?

    TI Thinks Resolved
    Part Number: OPA855-Q1 Other Parts Discussed in Thread: OPA858-Q1 , OPA859-Q1 , Hi team, Is it high impedance output in the case "power down connection" is on low logic? How does "power off mode" makes OPA855-Q1, OPA858-Q1, and OPA859…

  • RE: Does TI have reference design for differential Probe AFE application

    Hi Jimmy, We don't currently have a specific reference design for differential probes, however I can suggest some parts that may work. The biggest challenge with the specs you listed is finding a part with the needed common mode range that also has…

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