Using the VREFBUF on the STM32L4

[Scott Dev]

Posted on April 05, 2018 at 15:21

Hi

  I am about to choose a STM32L4 chip and want to use the VREFBUF for more accurate readings, and seems to be as accurate as external reference chips.  I havent used this before and couldnt find the answer when searching on the forum.  What I am not sure about is if this is simply an output that has to be tied to the VREF+ input pin? Or after its enabled , then internal circuit uses it, saving the need to connect to external VREF+ input pin? 

Many Thanks

Scott

[waclawek.jan]

Posted on April 05, 2018 at 20:58

IMO the description in the Voltage reference buffer (VREFBUF) chapter of RM is clear in this - it connects internally to the VREF+ pin.

JW