5 Replies Latest reply on Sep 30, 2016 1:08 PM by jasonkahana_1482786

    ADC not reading properly

    jasonkahana_1482786

      I am using an ADC in a design and I am getting readings that are lower than I'd expect.  I set up a test pin (Pin 1), and it's reading properly on my multimeter.  There are no external components connected to the psoc board at the moment.  The test pin is reading 1020 mV which is consistent with the design to that pin (VRef through buffer to pin).  But the PSOC is giving me 972 mV.    And it doesn't seem to matter if I use the SAR or DelSig.  

         

       

         

      I've used the DelSig before, and it read flawlessly.  The only major difference with that design and this is that I am using hardware muxes.  Could they be leaking current to ground?

         

       

         

      Thanks!

         

       

         

      jk