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  • OPA857EVM-978: Psudo differential output to single ended

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    Part Number: OPA857EVM-978 Other Parts Discussed in Thread: OPA857 Hello, I bought the OPA857EVM-978, but I won't feed the output to an ADC. Instead, I will feed it to a passive filter and then to a PID circuit. Thus, I would like to convert the psudo…
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  • OPA857EVM-978: No output from board in photodiode mode.

    TI Thinks Resolved
    Part Number: OPA857EVM-978 Other Parts Discussed in Thread: OPA857 Hello; I have purchased OPA857 EVM for transimpedance amplifier circuit measurement and avalanche Photodiode pulse measurement for my P.h.D thesis. First I have connected J4 (And I limit the…

  • OPA857EVM-978: No output from board in test or photodiode mode.

    TI Thinks Resolved
    Part Number: OPA857EVM-978 Other Parts Discussed in Thread: OPA857 The first time I tested this board I was unable to get it functioning properly. I spoke with a representative of TI yesterday regarding this issue and was advised to post here to determine…

  • RE: LMH32401RGTEVM: Thread : "LMH32401RGTEVM: Ringing in output of LMH32401" is locked, why ?

    Hello Sima, We simply connected the cathode of the APD to +150 V and the anode to inverting input of the OPA857. We used the bandwidth extension EVM of OPA857(OPA857EVM-978). I hope this answers your questions. Thanks , Krishna
    • Answered

  • OPA857EVM: OPA857EVM

    Resolved
    Part Number: OPA857EVM Hello, What is the difference between the OPA857EVM and the OPA857EVM-978? Thanks, Alex
    • Resolved

  • RE: RTOS/OPA857EVM: OPA857EVM

    Hi Ali, Please disregard my previous comment. I thought you were referring to the OPA857EVM, but I see that you have the OPA857EVM-978. The transformer primary winding will be a short circuit at DC, so you will not be able to make a DC measurement across…

  • OPA857EVM: What is the highest output from this board?

    Part Number: OPA857EVM Other Parts Discussed in Thread: OPA857 Hello, I have tried a few different photodiodes with this board but I have only got ~30mV as my highest output. I'm woundering what the highest output is for this board. Is it depending on…

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