AMC1400-Q1: Circuit design recommendation

Hi Archie,

Can you please ask the customer to clarify if this is for AC or DC voltage sensing? 

I see nodes specifying DC and also RMS values. 

If this is for DC voltage sensing, then I would recommend using AMC1411 with 0-2V input range and configuration (2). 

If this is for AC sensing, then I would recommend configuration (3) and using an R3' resistor to cancel the offset created by the input bias current. 

Please see these documents for additional assistance for AC voltage sensing: 

https://www.ti.com/lit/zip/sbar013

https://www.ti.com/lit/ml/sbaa350a/sbaa350a.pdf

https://www.ti.com/lit/an/sbaa553/sbaa553.pdf