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AD9984A not reaching minimum output value

Question asked by TSnauwaert on Nov 23, 2015
Latest reply on Jan 13, 2016 by DominicB

Hi,

 

We have been using the AD9984A for a few years on different projects where we adjust the gain and offset to get an output range with the minimum between value 0 & 3 and the maximum between 1020 & 1023.

 

Recently we noticed some components never reach the value 0 or 1023 on one of the colours, no matter how high or low the gain and offset are set. Now we also have two boards on which the minimum value doesn't even go below 4. I attached an image showing the clipping on the green channel of one of those boards.

 

The datasheet specifies there should be no missing codes (by design), so I wondered what could cause this issue.

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