When using the MPXM2202GST1 or the MPXM2053GS:
1. What does the 5th pin (tab) connects to? Can it connect to GND or should it be left unconnected?
2. Can the "Vout-" pin be connected to GND for single ended use or does it need to be isolated from GND?
3. What is the most common way of amplifying the 40mV full scale output to get a single ended output? Is a single stage instrumentation amplifier the answer? Is there an example schematic?