AD9845B DC Restore is setting the DC level to ~ 1.5V until the part heats up then it appears to be ~ 2.5V. A temp sensor inside the camera indicates the ambient temp is 40C so well below the max temp rating. After cooling the level drops to 1.5V. Any idea why it's drifting or what else could be influencing it?
Datasheet Figure 25 shows a 0.1uF DC blocking cap. What is the HPF cut-off frequency with this value? The customer has a 1uF cap.
This figure also shows a switch in series with the DC Restore voltage. How is this switch opened and closed?
Thanks,
Mike Baker
