Found this on another post from a TI employee:
"
Gifford,
MSP430F5438A is one of the new 5xx devices that have the temperature sensor built into the integrated REF module. Therefore configuration of the REF module is required in order to sample the temp sensor. Additionally, the device's coefficients are different from the MSP430F5438 (please check the latest datasheet) so you would also need to change the parameters for the temperature calculation. Attached is an updated code example in C that addresses the aforementioned changes.
Regards,
Dung Dang"
Sounds like they're just not bothering to update their documentation. Typical. This post was from 4 years ago