13 Replies Latest reply on Jun 16, 2015 5:07 AM by user_14586677

    What is the real offset voltage of the opamp for PSOC4

    gang.xue

      Hi,

         

      I do some tests with PSOC4 opamp, the result is not really good:

         

      I configure a opamp as a follower and put a signal like sinus from 0 to 100mV and i get the output signal ohne if the input signal > 49mV.  I tried all configurations and the results are the same.

         

      I checked the PSoC4 PSoC 4200 Family Datasheet_001-87197_0B.pdf and this is in the spec:

         

      SID288 VOS_TR Offset voltage, trimmed 1 ±0.5 1 mV High mode
      SID288A VOS_TR Offset voltage, trimmed – ±1 – mV Medium mode
      SID288B VOS_TR Offset voltage, trimmed – ±2 – mV Low mode

         

       

         

      So, I'd like to know what is the real offset of this chip, has someone experence with this issues?

         

       

         

      Thanks a lot for any infos!