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DAC61408: min VCC

domenyko
Genius 9655 points
Part Number: DAC61408

Dear all,

one of my AA is interested to use the DAC61408 to generate negative voltages.

The min VCC of the DAC61408 is 9V, unfortunately he does not have any rails higher than 5V. Since the output voltages will be only negative, is it possible to connect the VCC pin to a 5V supply?

regards,

Domenico

  • 0
    TI__Genius 14220 points
    Hi Domenkyo,

    Thank you for your query. As you have pointed out, the minimum supply for VCC is 9V. The device might work below this voltage but the performance is not guaranteed. So, we wouldn't recommend using 5V for VCC.

    Hope that answers your question.

    Regards,
    Uttam Sahu
    Applications Engineer, Precision DACs
  • 0 in reply to Uttam Sahu
    TI__Genius 9655 points

    Hi Uttam,

    thanks for the answer.

    But frankly speaking this kind of limitation is strange. According to the DS in case I need an unipolar output (0 to 5V or a bipolar +/-2.5V) I need to provide the VCC pin with at least 9V.

    How much headroom does the DAC require ? Is there any chance that the extra headroom is required for the linearity of the output buffer ? In my specific case the degradation of the linearity is not an issue.

    regards,

    Domenico

  • 0 in reply to domenyko
    TI__Genius 14220 points
    Hi Domenico,

    I understand your concern. The limitation has been provided to support some specific features in this DAC. Can you provide some more information on your application so that I can suggest an appropriate solution?

    If there is concern about confidentiality, we can move this discussion over mail.

    Regards,
    Uttam Sahu
    Applications Engineer, Precsion DACs
  • 0 in reply to Uttam Sahu
    TI__Genius 9655 points
    Hi Uttam,
    I prefer moving the discussion by email.
    regards,
    Domenico
  • 0 in reply to domenyko
    TI__Genius 14220 points
    Closing this thread as the discussion moved to mail.