Does TI Tiva C ADC 5V tolerant?
You need to look at the table called "Absolute Maximum Ratings" if you want to know if the chip will tolerate 5 volts (as opposed to function properly) on the analog inputs. It looks like some pins (at least when used as GPIOs) can tolerate up to 5.5 volts while others are limited to 0.3 volts above Vdd.