AnsweredAssumed Answered

AD7176-2 has unknown noise in sample data.

Question asked by homeway on Nov 13, 2017
Latest reply on May 17, 2018 by JellenieR

Hi ADI,

 

I got EVAL-AD7176-2SDZ (Rev-A), and I use it to test audio signal.

 

 

I use AD7176-2 to sample a pure 12.5 kHz 0.1 Vrms sine wave, and sample rate is 125kHz.

But there is a stable low frequency noise as below picture, so it make the wave envelope is unstable.

 

Isample rate 125k

 

My setting as below:

setting

 

The attachment is my test data.

Do you have any idea about this problem?

 

Thanks.

Homeway

Attachments

Outcomes