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AMC3301: AMC3301 input signal and output gain attenuation issue

Part Number: AMC3301

Hi Team,

My customer wants to use the amc3301 for overcurrent protection.The induced current of the block circuit is sampled.


The simulation circuit is shown in the following figure.


When the input signal is a triangular wave and a sine wave, the output is as follows.


Question:
1、Why is the amc3301 both input signal and output gain attenuated when input triangular signal?
2、How can we avoid the above problem and make overcurrent protection more accurate and timely?

Best Regards,

Hailan