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DC Coupling  ADL5565

Question asked by dlewis on Dec 16, 2013
Latest reply on Jan 9, 2014 by Jim

I am considering DC coupling the ADL5565 inputs, which appears to be more intended for AC coupling and all examples show AC.

 

I suspect Vicm needs to equal Vocm  for optimum RF performance?  when DC coupling

 

I do not see DC offset directly specified but the output offset appears large … -100 to 20 mV.

 

Given this rather than try to drive Vicm directly I would likely try to sense it and adjust Vocm to force Vicm to ground in a low frequency offset nulling feedback loop…

 

Any ideas help or data on DC coupling will be appreciated.

 

Thanks

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