In the K64F datasheet, it is specified that:
Max VREFH = VDDA.
(See figure 22.214.171.124)
In our application, VREFH is connected to an external 3.3V voltage reference IC (LM4120AIM5-3.3), and VDDA is supplied by a separate 3.3V power supply IC (MAX8881EUT33-T). What are the repercussions in situations where VDDA is lower than VREFH(due to the fluctuations in line regulation of both chips)?