SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
Each ADC has a VREFHI input and a VREFLO input. In external reference mode, these pins are used as a ratiometric reference to determine the ADC conversion input range.
See Section 18.14.6 for information on how to supply the reference voltage.