[Al Skierkiewicz]

Thanks, Joe.
Mike, if you take a look at the input circuit you will see the series resistor and capacitor. This circuit does a little low pass filter. (about 3kHz) Since this is a simplified drawing, you can guess that the A/D that follows is selected (optimized) for a particular input current/frequency in order to track and remain linear. The 100K value allows that, but a 10K would not. It is not a matter of possible damage, just not predictable results or noise immunity.