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OPA2364: 0.01µF bypass capacitor used instead of recommended 0.1µF bypass capacitor

Tobias Abele
Prodigy 90 points
Part Number: OPA2364

Dear Sir or Madam,

we have a component defect and want to analyse the root casue. Therefore we checked the datasheet and saw that we use a 10nF instead of a recommended 100nF bypass capacitor. Can this lead to a defect of the component? 

Note:  We use the component in a very slow differential amplifier circuit with some kOhm resistor on the input and output and as a voltage follower. 

Best regards 

Tobias

  • 0
    Guru 140200 points

    Hi Tobias,

    a too small decoupling capacitor will not destroy the OPA2364 by itself. But a higher decoupling capacitance can be helpful when it comes to ESD and stability because it can absorb more charge and provides a lower impedance over a broader frequency range in the HF region.

    Could ESD or an overvoltage at the input have destroyed the OPAmp?

    Can you show a schematic?

    Kai

  • Former Member
    0 Former Member

    Hello Tobias,

    I agree with Kai.  A small bypass capacitor is more likely to lead to insufficient performance than damage.

    Can you describe this "defect" in more detail?  Have you seen it occur in other units as well or just this one?  If you haven't tried already, I would recommend swapping the defective unit for a known good unit to see if the defect follows the part.  Any information you can share about the problem is helpful in finding the issue.

    If you are comfortable sharing your schematic online with a description of the inputs and outputs, that would also help greatly.  The information can also be shared privately, if that is preferable.

    Regards,

    Daniel

  • Former Member
    0 Former Member

    Hello Tobias,

    We haven't heard from you in some time and I hope you've made some progress on resolving your issue. 

    If you have any further questions, please feel free to post here.  If I don't hear back for a while, I will assume the issue has been resolved.

    Regards,

    Daniel