Posted on July 18, 2017 at 16:21Hi Vangelis,yes, that was the problem. On the layout for STM32F303 VREF+ was not connected. On STM32F302 VDDA and VREF+ share one µC pin. Thx!

Posted on July 14, 2017 at 10:46I currently have the same problem with the internal temperature sensor of STM32F303VBT6 (using Cube 4.21.0 and FW-lib 1.8.0). Always get value 4095. Same approach on STM32F302 works fine.