4 References
TB3146 - Analog-to-Digital-Converter-with-Computation (DS90003146)
TB3194 - PIC16/PIC18 ADC2 Technical Brief (DS90003194)
AN2749 - Using PIC18F26K42's 12-bit ADC2 in Low-Pass Filter Mode (DS00002749)
Using the Analog-to-Digital Converter with Computation (ADC2) Module (DS50002823)
TB3263 - Getting Started with ADCC on PIC18 (DS90003263)
Getting Started with Integrated Analog Peripherals of PIC® Microcontroller (DS900003320)