We are using AD9980 for LCD and we find all sort of distortion due to vibration (Gains Noise , Vertical lines ..)
We have check with the following but dont see any improvement.
1.changed Capacitor connected to FILT
2. Changed the capacitor connected to 1.8 V power and changed the way the capacitors are connected to GND 3.
3.Changed the capacitor connected to REF
We could see a little betterment when changed the FILT capacitor but problem is still to be seen
Could you please let me know with regards to the following .
1. Recommended values for capacitor connected to FILT
VSYNC 57Hz , HSYNC 25kHz ,Clock 20 Mhz ,resolution 640/400
2.Voltage at FILT pin is 0.4V , will this relate to vibration in any ways
3.Is the operation of AD9980 relate to Vibration , do you have any issue like this
Please advice me with regards to this issue .
With best regards and wishes