Hypothetical Scenario: I want to connect a 5v analog sensor to the Pi. Of course, the Pi's signal processing operates at 3.3v digital. Please assume that both analog-to-digital conversion and 5v-to-3.3v conversion MUST occur for the sensor to interoperate with the Pi.
First-Impression Solution: I can connect the sensor to an ADC converter to convert the analog signal to digital. Then I can connect the ADC to a logic level converter to step-down the signal from 5v to 3.3v. (My understanding is that level converters require digital signals on both sides). Finally, I can connect the level converter to the Pi.
Will this work? Is there a more efficient solution? I read somewhere that an Op Amp might replace both the ADC and level converter.