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ADA4411 output coupling capacitors

Question asked by apomerants on Jul 30, 2017
Latest reply on Jul 31, 2017 by JeyasudhaMuthuPerumal


The ADA4411 video buffer datasheet recommends on a 220uF  coupling capacitor over its output video lines .

In a new system we try to I/F we saw a jumpy video picture and found out this is due what seems to an "integration" problem (the video signal seems to be "riding" over a Ramp signal).

We saw that increasing the coupling capacitors from 220UF into 400uF solved the integration issue and thus the picture returned to its normal stable status.

What are the pos and cons for such an increasment in the capacitors value?

Are you familiar with another solution?

(we started by using a