Posted on May 17, 2011 at 12:581. Disconnect Vref and Vdda in 36, 48 and 64-pins STM32 (create pin +Vref as in 100-pins STM32). Please. It's not dificult. 2. Add internal precision reference 2,5V for ADC [ This message was edited by: dir on 03-01-20...

Posted on May 17, 2011 at 12:19In my oppinion the connection Vref and Vdda in 36, 48 and 64 pins STM32 is really bad idea. If ADC in 100pins STM32F103VB during my tests was very accurate and stable (Vdd and Vdda = 3,3V Vref = 2,5V from ADR391) then ...