ADC intern reference voltage on teensy 4

[Rawi]

Hi!
I work on a project for the school and i wanna use the ADC on T4, i found out that the Vref for the ADC is VDD? is it any other possibilities to VDD/2 or smaller?

Thanks in advance!

 

[jonr]

An external ADC could be more flexible about voltage, higher resolution, faster and/or quieter.