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Mixed signal design issue

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gmittal

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Hi All,

I am working on a Mixed signal design where AN IC needs bot Analog voltage and Digital voltage.

I am using Switching power supply to generate digital voltage. I was wondering how can I generate analog voltage on the board.

Thanks
Gaurav
 

Hi,

You could use the same voltage you use for the digital side, with some capacitance and possibly a linear regulator, but you'd have to be careful with your grounding (connect analog and digital grounds at one point).
 

power by the same smps and sepearte the voltage by a bead + decoupling caps.
 

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