I'm trying to achieve 30 fps with my linescan camera module. I'm attempting to do this by reducing the delays in between the SI and CLK pulses. However, I noticed that as I reduce the delays the accuracy fell in proportion. When I'm using a 170 microsecond delay the accuracy was pretty high and the camera's outputted values were noticeably lower when an object passed through its line of vision. When I attempt to reduce that to a 20 microsecond delay I will still see lower values if a cover the camera or a higher value if I shine a light on the camera, but the change is slight and there is not change if I hold an object from a distance.
The lower the delay time, the worse the accuracy. This confuses me because the datasheet states that the minimum delay time can be as low as 20 nanoseconds for the SI pulse and 50 nanoseconds for the CLK pulses. Since I'm still clearly above the minimum why am I losing so much accuracey? Am I doing something wrong or is this just how the TSL1401R-LF works? Is there no way to achive 30 fps without losing the accuracy?