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LMH1228: Overvoltage and undervoltage

Marcelo Hebling
Prodigy 80 points
Part Number: LMH1228

Hi everyone

Overvoltage and undervoltage

I would like to know what the effects of overvoltage and undervoltage are on the LMH1228 and whether these same effects apply to other devices in the LMH line.

Thanks, Marcelo

  • 0
    TI__Expert 8097 points

    Hi Marcelo,

    Overvoltage can damage electrical equipment by causing insulation breakdown, thermal stress, and component degradation.

    Undervoltage can effect the overall operation of the part. If the voltage is too low, the repeater will not function.

    This is the same for all the LMH line.

    Best,

    Nick P.

  • 0 in reply to Nick Peabody
    Prodigy 80 points

    Hi Nick

    If the supply voltage is above the maximum value stated in the device's datasheet, could the input signal suffer some type of degradation or instability and cause failures or even the device not functioning correctly?

    I know that my messages may seem somewhat meaningless because they are something obvious, but I need these details to make a decision regarding our projects.

    Another question, if I develop an SDI signal distributor, can I use a single voltage regulator for all LMHs or should I use a regulator for each LMH? What is Texas' recommendation for this case?

    Best regards,

    Marcelo

  • 0 in reply to Marcelo Hebling
    TI__Expert 8097 points

    Hi Marcelo,

    LMH devices have internal voltage regulators specified and characterized within the voltage range that is noted in the datasheet +- 5% so operating out of this limit the operation of the parts is not guaranteed.

    You can use a single regulator. Make sure that on each LMH device you include a big capacitor, a small capacitor, possibly a ferrite bead, and other recommended supply filtering.

    Best Regards,

    Nick P.

  • 0 in reply to Nick Peabody
    Prodigy 80 points

    Hi Nick

    Do you believe that have more any thing to send me about this subject?

    Best Regards,

    Marcelo

  • 0 in reply to Marcelo Hebling
    TI__Expert 8097 points

    Hi Marcelo,

    Please see my comment on the slew voltage e2e.

    Best,

    Nick