Part Number: AMC1350
I plan to use the AMC1350DWVR to measure AC voltage. Its supply is a 12 V rail generated by the auxiliary power supply of a totem-pole PFC converter. I would like to clarify how to implement AC voltage sampling when the circuit is referenced to this power ground. Should the input be sampled via a resistor voltage divider, or configured as differential sampling? According to the device datasheet, pins 3 and 4 of the AMC1350DWVR must be connected together to the same ground potential. Please advise the correct sampling implementation under this grounding constraint. 
