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Original question:

ISO3088: ESD, EFT and surge protection of RS-485 isolated node with no protective earth connection

ISO3088: ISO3088: ESD, EFT and surge protection of RS-485 isolated node without any protective device (TVS, ESD, etc)

Lin_Charles
Expert 4260 points
Part Number: ISO3088
Other Parts Discussed in Thread: ISO1410

Hi team,

My customer wants to know what grade can our device bus side survive when without any protective device (TVS, ESD, etc) passing ESD, EFT, and surge  EMC tests? Thanks.

BR,

Charles Lin

  • 0
    TI__Genius 17100 points

    Hi Charles,

    Thank you for posting to E2E! Below are the datasheet ESD specs for ISO3088:



    Please allow us to follow up within one day regarding EFT, surge, and EMC data.


    Thank you,
    Manuel Chavez

  • 0 in reply to Manuel Chavez
    TI__Expert 3482 points

    Hi Charles,

    Thank you for reaching out to us!

    ISO3088 is an older generation device that does not support same-side IEC EFT, surge, and EMC specifications.

    SN65HVD308XE is the transceiver used inside the ISO3088. INT-TRX team came up with this reference design to use external protection components to achieve system-level protection.

    However, I recommend our latest device ISO1410 (pin-to-pin to ISO3088) for your newer designs. This device supports same-side IEC 61000-4-2 contact discharge up to 16kV and IEC 61000-4-4 electrical fast transient up to 4kV without any external components.

    Regards,

    Alfred