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Voice Noise can be heard when using ADAU1961

Question asked by henry-tang on Oct 31, 2017
Latest reply on Nov 1, 2017 by DaveThib

Hi ADI Expert,

 

When I use Micphone and ADAU1961 to record voice, I found there's noise can be recorded as attachment (test1.wav).

Even I disconnect micphone and ADAU1961, the noise is still there and can be record and heard.

This noise will become smaller if I changed change cap at LINP/LINN from 0.1uF to 10uF as datasheet reference schematic.

 

I would like to ask whether there's any thing I can change to minimize this noise? thanks very much! 

 

Henry

 

 

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