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Queries about AD10200

Question asked by WayneQ on May 7, 2014
Latest reply on May 13, 2014 by jpendle

Dear Supporter,

 

I used AD10200 in my project. I tested AD10200 with signal generator. The sampling clock is 105MHz. FFT N=65536.

When I input 10MHz sine wave, the FFT result looks good. Please see below pic.

AD10200_sine_Fin_10MHz_Fs_105MHz.bmp

but when I input 41MHz, 71MHz or 105MHz respectively, the results look poor, please see below pics.

AD10200_sine_Fin_41MHz_Fs_105MHz.bmp

AD10200_sine_Fin_71MHz_Fs_105MHz.bmp

AD10200_sine_Fin_121MHz_Fs_105MHz.bmp

I am not sure why the waves are abnormal. Could you please help give me some comments on the issues?

 

Thanks in advance for your help!

 

Br,

Wayne

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