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LAUNCHXL-F28379D: No access to third channel DAC in Launchpad F28379xD

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: TMDSCNCD28379D

I am trying to work out the algorithm for dual synchronous reference frame pll for active harmonic fiter for which i'll be needing three phase voltage signal which i can later process for calculating frequency. I had thought of generating 3 sine waves through the 3 DAC outputs that I have in this launchpad, however after inspecting and going through the launchpad schematics there are only two dac outputs(which I think should have been 3) which are accessible to me even though the launchpad box says of the number being 3. Is there something that I am missing out.

  • Aakash,

    You are correct. This LaunchPad does not have all three DAC modules out to pins on the BoosterPack Headers. You do have access to some PWM-based DACs on J8-1 and J8-2 as well as J4-1 and J4-2.

    You are also correct that the box does show that there are 3 DAC Outputs, but it is referring to the device features available, not necessarily what is on the LaunchPad itself.

    If the PWM-based DACs are not sufficient, I would suggest moving towards the ControlCard (TMDSCNCD28379D) or making a custom PCB.

    Thanks,
    Mark
  • Thank you for the heads up Mark. I think pwm DACs should be sufficient enough. I will go through all the device examples for using these 4 pins and then will reach out to you the earliest. But thank you.
  • Great! I am happy to help. Please don't hesitate to post again if you have any additional questions.