Does LTC5586's LO input needs filtering?

I'm wondering if the LTC5586's LO input needs filtering like ADL5380? as it probably shares similar means to shift the LO input for the 0 and 90 degree signals. However, I also realized the 5586 LO input has band selection and a couple of configurable parameter, which may help with LO harmonic tolerance? I don't seem to able to find the official data. Please clarify.

Thank you with regards,

David

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  • +1
    •  Analog Employees 
    on Feb 16, 2021 6:54 PM

    The LTC5586 has programmable LO match, which is not available on the ADL5380. When the LTC5586's LO match is properly set, it does provide fair amount of filtering of 3rd and the 5th harmonics. The LTC5586 also has I/Q gain and phase optimization feature that can be used to reduce errors introduced by LO harmonic. However, LO match and I/Q optimization may not completely remove the effects of very high LO harmonic. I would suggest that you order an evaluation board and test it with your signals.

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  • +1
    •  Analog Employees 
    on Feb 16, 2021 6:54 PM

    The LTC5586 has programmable LO match, which is not available on the ADL5380. When the LTC5586's LO match is properly set, it does provide fair amount of filtering of 3rd and the 5th harmonics. The LTC5586 also has I/Q gain and phase optimization feature that can be used to reduce errors introduced by LO harmonic. However, LO match and I/Q optimization may not completely remove the effects of very high LO harmonic. I would suggest that you order an evaluation board and test it with your signals.

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