I am considering using this:
Looks pretty good for $5.
The abs max rating for analog input pins is +-0.3 volts from the analog supply rails, and maybe 10 mA continuous.
Then, on page 25, is the warning to never allow the ESD diodes to conduct, with +-0.1 volts max past the rails. They restate it as an equation!
Red flag. Sounds like a latchup problem or some other bug. I hate it when people do stuff like this.
Every data sheet should address ESD diode conduction consequences. And capacitive loading issues, too.
Every data sheet should be read by a competent, maybe even literate, engineer and checked for inconsistencies.
grrrrr.