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LTC5586 : Anti-alias Lowpass Filter


I would like to have more informations about I/Q anti-alias Lowpass filter for LTC5586 IQ demodulator.

I don't understand how to calculate/simulate Low pass filter defined in datasheet page 24 ?

When I try to simulate, with LTspice this filter (page34), Bode diagram is not flat with several resonances.

Could you send me how this filter can be simulate with ltspice?


Best regards