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Switching power grounding

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EDA_hg81

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I am using switching power supply to power few analog circuits.

Should I connect the grounds of switching power supply to analog or digital ground?

I have separated the ground into two sections: digital ground and analog ground.

Thanks and merry Christmas.
 

you filter digital grounds in a balanced fashion
you filter anaglogue grounds in an unbalanced fashion

relative to earth


digital grounds should remain relative to your circuit
therefore remain within its confines
so ground the digital ground to uniform 0v

the analogue to the box
couple the box to 0v via a filter....
 

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    EDA_hg81

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Thank you and merry Christmas!
 

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