• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 172 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.

Original question:

TMP468: How to use TMP468 correctly?

TMP468: D+ Unconnected/Unused

Don Schelle
Expert 4150 points
Part Number: TMP468

Hello,

I have a question about leaving unused inputs floating.

The datasheet clearly states that unused inputs should be connected to D-.    This is to ensure that over-temperature thresholds are needlessly triggered.

I have a design which has D+ floating on one of the inputs.   This channel is unused. 

A few questions:

1. Can I ignore errors at startup and then disable the open-channel via the configuration registers?

2. Will the open channel impact measurement accuracy on other channels when disabled?

3. Is there anything else I should be concerned about?

Don

  • 0
    TI__Expert 6820 points

    Hi Don,

    Below is my feedback.

    Don Schelle said:
    1. Can I ignore errors at startup and then disable the open-channel via the configuration registers?

    Yes, leaving the pin floating will set OPEN bits for their respective channels.  You can ignore them OPEN bits and disable the channels using the configuration register.  The set OPEN bits should then reset to 0.  

    Don Schelle said:
    2. Will the open channel impact measurement accuracy on other channels when disabled?

    Open channels should not affect on any other channels temperature accuracy.  

    Don Schelle said:
    3. Is there anything else I should be concerned about?

    After disabling the unused floating channels I have no other concerns with device operation.  

    Thanks,

    David