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AD8338 single-ended and ac-coupled

Question asked by jcesnik on Mar 30, 2015
Latest reply on Apr 3, 2015 by jcesnik

Hello,

 

I am designing in the AD8338 in a new design, and I have some questions about driving it single-ended and AC-coupled in an audio application.  Please refer to the attached schematic excerpt...

 

Do the AC-coupling capacitors need to be balanced when using this device single-ended (i.e. - can I use 220uF on the INPD input and .1uF across VREF/INMD)?

 

Can I eliminate the 50-ohm resistor on the INMD input (R6 in this example) and just connect the cap from INMD to VREF?

 

Thanks in advance.

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