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ADV7182 has wired burst pulse on input pins

Question asked by Allen123 Employee on Jun 30, 2016
Latest reply on Jun 30, 2016 by JeyasudhaMuthuPerumal

Hi,

 

    I got some problem using ADV7182 on the input pin.

    Now there have burst interference signal the frequency is same as horizontal frequency when we used ADV7182 in differential input model as attached.

1. We switch input to AIN1/2, and there's interfence pulse just on AIN1/2 pin, but AIN3/4 is OK. Remove the camera from input connector, interference pulse still exist.

2. We switch input to AN3/4, and there's interfence pulse just on AIN3/4  pin, but AIN1/2 is OK. Remove the camera from input connector, interference pulse still exist.

3. Remove 1.8V voltage from ADV7182, no interference pulse is seen.

Does anyone have such problems?

Thanks!

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