AMIS-720341-A: Contact Image Sensor
Data Sheet
9.0 Video Output Response under Exposure
The four video signal outputs as function of light exposure, are given in Graphs, A, B, C, and D. The measurements are conducted in a
black box that enclosed the light source, the PCB and the instrument to measure the light power. The LED source mounted at the top
radiated its light energy directly onto the image sensor of the A6 PCB that was lying flat at the bottom of box. The video output was
measured at the amplifier output of the A6 PCB. The PCB setup condition is described in Section 8.0. Note that the gain of the amplifier
is set to one. Also the clock duty cycle is set to 25 percent for the 2.0MHz clock frequency and set to 50 percent for the 5.0MHz.
VIDEO OUTPUT VS EXPOSURE
PI3041A RED LED RESPONSE 2.0 Mhz
4.000
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
EXP
EXPOSURE (uJ/cm^2)
76
Figure 7: Graph A - A Typical Video Output a as Function of Light Exposure
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AMI Semiconductor – May 06, M-20570-001
8
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