What is the use of the differential RC filter at the end of this op amp (at least I'm seeing R100+R98+C28 as that)?
P3_3V_REF is a reference voltage for the 4 ADCs in the TMS320F28377D-EP MCU. An article from LT explains to me the reason for using the buffer after the reference voltage IC when providing a reference voltage to multiple ADCs from a single source. I could understand why you might want an LPF on your reference voltage to cut out any high frequency noise, but I dont see the need for it to be differential. So is there any reason for R98?