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TLV2171: May I know what TLV2171 happen when it output latch?

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Replies: 4

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Part Number: TLV2171

Hi Team,

May I know what TLV2171 happen when it output latch? Even thought TLV2171 input signal change, output keep latch. Only power off, TLV2171 work normally.

Do you have any suggestions?

Thanks!

  • Hi Eggsy,

    latch-up usually occurs when an input or output voltage is given to the OPAmp which is beyond the supply voltage of OPAmp. See section 6.1 of datasheet.

    Can you give us a schematic?

    Kai

  • In reply to kai klaas69:

    Eggsy,

    Also measure the input voltages and output voltage when the device is "latched". Please include the power supply voltage(s) for the op amp.

    Regards,
    Ronald Michallick
    Linear Applications

    TI assumes no liability for applications assistance or customer product design. Customer is fully responsible for all design decisions and engineering with regard to its products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning Customer's design. If Customer desires engineering services, the Customer should rely on its retained employees and consultants and/or procure engineering services from a licensed professional engineer (LPE).

     

  • In reply to Ron Michallick:

    Hi Kai and Ronald,

    Thanks for your help!
    The issue happen in EFT test.
    But my customer use TL082 to replace the TLV2171, it work normally under EFT test.
  • In reply to Eggsy Pang:

    Hi Eggsy,

    replacing the TLV2171 with the TL082 might not be a true fix of the latch-up problem. To make an OPAmp withstand ESD, Burst and Surge, protection circuitry usually needs to be added.

    Kai

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