Other Parts Discussed in Thread: ADS1114
Hello all
I want to use a ADS1115 to perform two differential measurements of a floating system. The system is a photovoltaic test bench, basically a PV cell connected to a variable resistor with a shunt and a voltage divider to perform current and voltage measurements. It's meant as a demonstration tool, so speed or high accuracy is not of any particular concern.
The resistance values in the diagram are illustrative.
The photovoltaic cell can be inserted both ways, so the measurement needs to be differential. The analog inputs stay connected to the circuit.
My question is regarding to the channel-to-channel voltage limits of the ADS1115, particularly of the internal MUX switch. As you can see in the diagram, while the voltage between the two differential inputs stay well within the limits (1V), the voltage between the two differential input pairs can reach up to 30V. Is this within the limits of the MUX switch? In the datasheet I only found the channel-to-ground limit values, but the measured circuit is floating so that should be okay.
