Part Number: AMC1350
Tool/software:
Hi
I am currently working with the AMC1350 to provide reinforced isolation for a voltage sensing circuit. My input signal is 100 V peak-to-peak sine wave, which is stepped down by a factor of 0.0021 using a voltage divider before being applied to the differential input of the AMC1350.
Based on the information provided in the datasheet, I expected that the minimum output voltage (for a full-scale input) would be around 0.25 V, even when the input is in the negative half-cycle. The graph in the datasheet, which I believe supports this expectation, is included in the screenshot below.
However, after simulating the circuit using the SPICE models downloaded from the TI website, I observed a different output. The simulation resulted in a sine wave oscillating around 0 V, with a minimum voltage near 80 mV. I understand that this may be related to voltage when multiplying the input by the amplifier's gain, but as per the datasheet graph, I was expecting an offset sine wave above 0 V.
Could you please clarify why the simulated output differs from the expected result? Is there an additional factor I should be considering, or a potential issue with the simulation setup?
Thank you for your help!
Simulation screenshot and .TSC file are given below.
Please help me understand this variation in given graph and simulation output.
