STM32F407 decoupling capacitor 100nf or 10nf

[DNI]

The power supply scheme indicates to use 100nf for vref and vdd, but in the General PCB design guildines section (Figure 51 and 52) indicates that 10nf power decoupling capacitor should be placed.

 I am confused which capacitor is suggested for adc decoupling. 

Thanks. 

[TDK · Accepted solution]

Either one will work. 100 nF is more common. Exact values depend on what your exact application and layout.

[ELABI.1]

Hi @DNI,

Both options work as @TDK mentioned. The important point is to place the component very close to the MCU, with short connections to VREFP and VREFN. Additionally, it should have a small package size (0603 or 0402).

Thank you.

ELABI.1