A issue about AD9888 operation


    I am working with the AD9888 chip to capture VGA images. The resolution of the VGA image is 1280*1024 at 60 fps.  In room temperature, the output image displays normally, but when the temperature is below zero, -20 degree etc. , the output image displays with some jitter horizontally.  Does the AD9888 chip  work not well when temperature is below zero or some issues exist in my design?  

    Best regards,

    Daniel SHI