1 Reply Latest reply on May 23, 2011 10:02 AM by graa

    2.5V Bias and protection in regards to digital ground

    joshua.sisson

      Hello,

         

      I'm in need of some suggestions for this issue. We are currently using the cy8c29866 for a thermocouple reader system.

         

      It does its job great, but we have some issues with protection circuitry involved. The protection circuits we employ are to clamp or block 240vac. The problem is, due to the system using a 2.5bias analog ground, the protection circuits are rendered useless.

         

      Is there a way that the psoc can read into the insamp without this 2.5v bias on the analog in?

         

      Thanks.

         

      PS, we are using the three op amp insamp module @ 48 gain and a del-sig @13bit