1.8V VDDA-Vref Voltage

[Makif]

Hello,

I have a custom STM32WB55 board and for custom purposes, I want to use VDDA=1.8 V and Vref=1.8 V from same Reference IC. According to datasheet, I can decrease VDDA from 3.3 V to as low as 1.62 V but I just wanted to make sure that it won't cause any problem in terms of VDDA supplied analog circuits etc.

Best Regards,

Mehmet.

[AScha.3]

Hi,

from ds:

So at 1,8V you cannot use vrefbuf and no USB .