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  • OPA857: low-noise alternative

    TI Thinks Resolved
    Part Number: OPA857 Other Parts Discussed in Thread: LMH32404 , LMH32401 , OPA818 , OPA859 Hello, team. Could you please suggest, do we have any updates of OPA857 device? Customer is wondering if we can propose any modern alternative with better noise specs…

  • 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…
    • Answered

  • OPA856: DC to 100 MHz Filter design , PSPICE model with PD and design assistance

    Resolved
    Part Number: OPA856 Other Parts Discussed in Thread: OPA859 , OPA857 , OPA855 , OPA2837 , OPA837 , TMUX1109 For test and measurement purposes, a design with switchable gain (x1, x10 and x100) and switchable filter (100 kHz, 1 MHz, 10 MHz, full [>100 MHz]) …
    • Resolved

  • 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…

  • RE: OPA356: Amplification for Ultrasonic NDT Signal

    Thank you Sima for suggesting the OPA859. I looked at this part as well as the OPA858 however I was concerned that they were really meant as trans impedance amplifiers. Is this part reasonable to use with a voltage pulse source as we have here?

  • RE: OPA857-DIE: Transimpedance amplifier

    Hi Francesco, I have seen customers use a source follower/common drain to buffer the input to the OPA855, since this decreases the effective input current noise. I cannot confirm whether this gives better overall performance than the OPA858, which has…

  • RE: LMH32401: Photodiode Current Pulse Amplifier Figures of Merit - Comparing LMH32401 to MAX40213

    Hello Charles, We do not have a single amplifier with TIA gain as high as the MAX40213. What we would recommend is to use an amplifier like the LMH32401 followed by the OPA855 in a difference amplifier config to create the requisite gain. One advantage…

  • RE: OPA659: Question about current noise

    The plot in the OPA859 data sheet is what prompted me to ask the question. It is not clear to me if it applies to CMOS transistors only or if it applies to JFETs as well. Figure 22 in the OPA659 data sheet shows the current noise constant up to 10MHz…
    • Answered

  • RE: LM7171: High gain bandwidth product OP Amp

    Resolved
    Incidentally, the OPA859 is one option -

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