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LMV339: About unused terminal processing.

Kengo.Y
Guru 10385 points
Part Number: LMV339

Hi team.

Could you give me some advice how to handle unused terminals?

I'm happy to tell me the recommended resistance value.

Sincerely.

Kengo.

  • 0
    TI__Expert 4555 points
    Kengo,

    To make sure you don't consume unnecessary power, you can connect the unused inputs to two different (not low impedance) voltages. If connected to low impedance source use a series resistor. This gives a known and stable output that is not used.

    Alternatively, connect one input to GND/VCC- pin through series resistance and the other to VCC through a series resistance. This gives a known and stable output that is not used.

    Regards,
    Jonny
  • 0 in reply to Jonathan Nguyen
    Guru 10385 points
    Jonny.

    Thank you for your reply.

    Is it OK if the output is open?
    And then, is it possible to connect the both input to GND?

    Sincerely.
    Kengo.
  • 0 in reply to Kengo.Y
    TI__Expert 4555 points
    Kengo,

    Yes it is ok if the output is left open.

    It is possible to connect both inputs to GND - this will give an unknown and possibly unstable output. Never do this however if you are using split supplies. If the negative supply comes up last, the negative supply could go positive and damage the part.

    Regards,
    Jonny
  • 0 in reply to Jonathan Nguyen
    Guru 10385 points
    Jonny.
    Thank you for your reply.
    I understood about unused terminal processing.

    Sincerely.
    Kengo.