AnsweredAssumed Answered

ADV7182 noise at Vref pin

Question asked by on May 27, 2014
Latest reply on May 27, 2014 by GuenterL



There is C2&C3 which is not inserted on the evaluation board of ADV7182.

What kind of case are these used for?

And please let me know the recommended value.


Intention of the above question:

The user confirmed the noise on video image, and found the noise pulse at Vref pin as the below picture.

This behavior disappears when the user touches around the capacitor connected to Vref on the user's board with a finger.

I assume that the Vref pin is unstable and an effect of C2&C3 is related to such a malfunction.


Best Regards,