Who mentioned that? Did you ask them to explain themselves?
Can you post a link - so that we can see it in context?
Yes, the question would be more appropriate elsewhere.
I would suggest starting with the manufacturer's support sites for those chips - they will have datasheets, app notes, etc on using their parts...
No this is incorrect in general if you have two different AC input sources at A0 and A1.
The capacitors will create larger crosstalk between these two channels A0 and A1 (assuming that A0 and A1 are both analog inputs).
But if you are measuring DC voltage levels, then this is correct.
The MPX53DP has a output voltage +/- 60mV.
Also is the ad1115 input range is +/- 256mV with input mux A0-A1.
I recommend using a bipolar signal amplifier with shortes connection to MPX53DP.
Remove the input capacitors.
These put a capacitative load on the adc input.
Use shielded cable and connect the shield only to one point on ground.
Otherwise, eddy currents will occur.
Connect unused adc inputs to ground.
The voltage will change according to the measurement that the MPX53DP makes. When the pressure changes, so will the voltage that enters A0 and A1 (as the MPX has two wires, one for each pressure sensor)
So this isn't static (but maybe I misunderstand what you mean)
Does the pressure change quickly, or slowly? The capacitors will remove high frequency components including quick pressure change and noises.
You will get slower, but smoother output (less noisy too).
Dynamic pressure measurement wants to capture the quick changes, so the capacitors won't work.
But for slow pressure change, the capacitors are good.
Let me keep it simple by saying, heat up liquid in a boiler with a limited opening for pressure release but sufficient enough to keep the system at atmospheric pressure - under correct conditions - .
And this is what the MPX53DP is for! Checking if all is right or when pressure builds up. The pressure must be sort-of equal between 2 points (that's why i use a differential sensor) this pressure and its difference will be checked against current atmospheric pressure (BME280)