3 Replies Latest reply on Feb 18, 2019 2:56 PM by BoTa_264741

    maximum streaming rate using Delta Sigma ADC

    user_58361

      Dear community,

       

      For my internship, I am interested in the maximum streaming rate when using a Delta Sigma ADC to read an input and output it using a VDAC. The actual signal that will be used for the control algorithm will also have to be filtered, which might introduce more delay than I am already experiencing. Moreover, the signal will be around 80 kHz.

       

      During testing, I saw that a sinusoidal signal of 50 kHz already has quite some phase delay with respect to the original signal, when it is outputted to using a VDAC. Is this just the limit of the PSOC5 I am using? Or am I missing some things that might give me better performance? For reference on what I did, see the figures below (yellow is signal generator, blue is VDAC). Also, the project has been attached.

       

      ADC_DMA_VDAC_1kHz.png

      ADC_DMA_VDAC_50kHz.png

       

      With kind regards,

       

      Jim