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TLV3012: is input series resistor needed?

Viktorija Cecil
Mastermind 18231 points
Part Number: TLV3012

Does TLV3012 require a series resistor in-line with the inputs to limit the current if inputs ever go beyond the supply voltage? Don't see this info in the datasheet.

Thanks

Viktorija

  • 0
    Guru 140200 points
    Hi Viktorija,

    yes, a current limiting resistor is needed if the input signal exceeds the supply voltage. Cou can see it in the absolute maximum ratings and the footnote (2).

    Kai
  • 0
    TI__Guru 53826 points

    Hello Viktorija,

    If you can guarantee that the inputs will not exceed the supplies, then you do not need a resistor.

    But it is recommended if the signal is coming from an off-board source, or, a source that is derived from another power supply system, that some series resistance is added to limit any transient currents that may occur during the power-up or power-down sequence.

    Our rule-of-thumb is 1kohm per volt of expected overvoltage. So if the worst case is 5V, then add a minimum of 5k series resistance.

    If everything is coming off the same supply, on the same board, then you do not need a resistor.