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AD8220 shift phase

Category: Hardware
Product Number: AD8220

Hello All,

I'm working on RLC meter. I use AD8220 at my project like current sense. I measure voltage drop at the shunt.

I have problem with phase shift in big value of gain from, more than 100.

I would like to measure current with bigger gain due to keep low value of shunt. High value of shunt will move the phase at measured impedance.

I did simulation at LTspice and looks like the same like real measurement.

Could you tell why AD8220 introduce phase shift at the higher value of gain, please?

Thank you in advance.

Best regards,


Simulation added
[edited by: MateuszPL at 3:47 PM (GMT -5) on 1 Feb 2023]