• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 92 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DAC81404: floating SENSENx pin safe ?

mmg IPG
Prodigy 90 points
Part Number: DAC81404

Hello,

I want to use the DAC81404 and it's ground sense functionality. Therefore, the SENSENx pins shall be brought out of the module on the user connector.
In a normal application, the user would then connect the SENSENx pin with a separate line to the ground.
The SENSEPx pins won't be used and thus connected to the DAC outputs on the board itself.

What happens, if the user mistakenly forgets to connect the SENSENx pin (thus leaving the pin floating) ?
Would this somehow damage the DAC81404 or cause undefined behaviour?
Should the SENSENx pins be pulled-down with a weak pull-down resistor?

Regards,
Marcel

  • +1
    TI__Guru 52683 points

    Hi Marcel,

    If you leave SENSENx floating, you basically have turned the ground buffer from a inverting gain of the SENSEN pin to just a unity gain buffer of the REFGND. there is no risk of damage if the pin is left floating.

    Thanks

    Paul