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Output of ADV7123

Question asked by Kou on Oct 28, 2013
Latest reply on Nov 1, 2013 by Kou

Dear Sir/Madam,

 

We have some questions about ADV7123 High Speed Video DAC.

Pls refer to the attached file.

 

There are ringing when the input data changes from 0x3ff(0x00) to 0x00(0x3ff) simultaneously.

We guessed that the reason of this phenomenon is in ground and power planes.

So,add the capacitors and use the other clean power supply.

However the phenomenon did not change.

 

Our questions:

Q1.When the input data changes, does high current flow into a device?.

Q2. Does an output become unstable in during the transition time?.

Q3.Do you have any ideas about this phenomenon?.

 

Pls give the advice to us.

Thank you.

 

Best Regards,

Kou

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