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LM239: OUT PIN

Prodigy 10 points

Replies: 2

Views: 47

Part Number: LM239

Is there a way to set the OUT pin to GND output using dual power supplies?

  • Hi,

    you mean to get the same performance as if the GND pin of LM239 was connected to signal ground? No.

    The LM311 can do this. Or add an additional transistor stage to the output which is referenced to signal ground.

    Kai

  • In reply to kai klaas69:

    Kai is correct that it would require additional components to achieve what you are asking for.

    Attached is a TINA schematic showing one way to do it by adding a zener diode equal to the negative supply voltage used to power the comparator.

    ChuckLM393B split supply.TSC

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