If I have a single 100Hz AC signal biased by two 1 M-ohm resistors (as per schematic below), and then output to an Arduino UNO analog input pin, with the UNO sampling at around 1 kHz using delays, would there be any issues with the ADC result?
(Source of schematic: http://tinyurl.com/ycprqsdx)
From the Atmega328P's spec sheet (the UNO's microprocessor) it recommends an output impedance of 10 k-ohms or less, as shown below. If I used the pair of 1 M-ohm resistors as a biasing circuit and then deliberately slow down the sampling with delays (i.e.: in loop, do analogRead, then delay, then do analogRead, etc.), would it still be okay?