10 Replies Latest reply on Jan 16, 2014 6:34 PM by user_14586677

    SAR ADC V reference limits

    kiaran.smyth

      Can anybody tell me the minimum external voltage reference that can be used with PSoC4 SAR ADC? 

         

      I am trying to to measure small signals +/-20mV pk.  I could amplify them, but that would limit the bandwidth.  The internal amps have a maximum GBW of 6MHz and I need a bandwidth of at least 200kHz which limits the gain to a maximum of 30.

         

      A (hopefully!) simple solution would be to use a lower V ref, but I can't find any data which states the minimum value that the ADC will reliably work at.  

         

      Any help would be appreciated.