I see that LTC1968 RMS to DC converter has a differential input that can be driven in single ended or differential mode and DC or AC coupled.
If I drive the input with a fully differential op-amp, do I need to place an RC filter between the op-amp outputs and LTC1968 inputs? Would a damping resistor (two in my case) be enough to mitigate the spikes generated by the switches capacitor input of the LTC1968?
I also see that the input of the LTC1968 must have a return path to ground, therefore it is not possible to place a series capacitor on both inputs. It seems that this aspect is not modeled in the LTspice model. I see no different behavior if I place two coupling capacitors on both inputs. Am I correct?