3 Replies Latest reply on Oct 3, 2018 10:06 PM by msur

    PSoC6 Vref

    user_353361858

      Can someone clarify what the internal Vref level on the PSoC6 is? I had assumed it was 1024mV (as per all the other PSoCs I've used), but I see references to 1.2V in both the datasheet and TRM. My design will use both the ADC and DAC, I'm assuming there is only one Vref, and there isn't some difference there. Are the references to 1.2V in error or am I missing something?

       

      Cheer

       

      Anthony

        • 1. Re: PSoC6 Vref
          msur

          Hello Anthony,

           

          PSoC 6 can have two different internal VREF levels - 0.8 V or 1.2 V. You can select the VREF you want to use for your analog system in the Systems tab in your cywdr file (as shown below).

           

           

          Let me know if you have any further questions.

           

          Regards,

          Meenakshi Sundaram R

          • 2. Re: PSoC6 Vref
            user_353361858

            Thankyou Meenakshi,

             

            Appreciate the clarification, I should have also mentioned that in AN218241 (PSoC 6 MCU Hardware Design Considerations) on pg 19 (section 9.2) it states:

             

            "PSoC 6 MCU also has an internal precision reference of 1.024 V (±1 percent)."

             

            Which was another source of my confusion, I assume this is a hangover from other versions of this doc and so would need updating?

             

            Cheers

             

            Anthony

            • 3. Re: PSoC6 Vref
              msur

              Thanks Anthony - really sorry for the confusion. I think that was a miss (from me being an author of the AN ) and will definitely get fixed in the next version

               

              Regards,

              Meenakshi Sundaram R