• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 46 subscribers
  • Views 282 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.

DAC7760: SDO pin, push-pull or open drain?

Oba
Genius 16775 points
Part Number: DAC7760

Hello,

I think SDO pin of DAC7760 is push-pull output.
But my customer is reporting that it requires an external pull-up.
Without the pull-up, it doesn't work. 

Is SDO open drain?

Regards,
Oba

  • +1
    TI__Guru* 94895 points

    Oba-san,

    The DAC7760 output should be push-pull. None of the example circuits in the datasheets and neither of the two EVMs have pull up resistors have pull-up resistors on SDO. In some of our devices, SDO needs to be enabled, but in this device SDO is always enabled. 

    Can they share a schematic? I wanted to check to see if there was anything else on the SDO, make sure that the controller side and the device side I/O are at the same voltage, and to see if the GND is also connected correctly.

    Joseph Wu

  • 0 in reply to Joseph Wu
    TI__Genius 16775 points

    Hello Joseph,

    Today I tested with DAC7760EVM and confirmed it is push-pull output buffer.
    I will send the schematic by E-mail.

    Regards,
    Oba