PI3034A Datasheet, PDF (3/7 Pages) AMI SEMICONDUCTOR – 200DPI CIS Sensor Chip

Chip-to-chip non-uniformity
Ud
± 7.5
%
Dark output voltage
Vd ⁽⁵⁾
<50
mV
Dark output non-uniformity
Ud ⁽⁶⁾
<50
mV
Table 2. Electro-Optical Characteristic
Notes: (1) Tint stands for the line scanning rate or the integration time. It is determined
by the time interval between two start pulses.
(2) f stands for the input clock frequency:
@ 500 kHz the total active line scan time for a A4 CIS module is 3.45 ms
of the line integration time.
(3) Vp is an average of the pixel amplitudes in one complete line scan. These
video pixels are converted from signal currents produced by the
phototransistor at each pixel site. The signal current charges the video line
capacitance that is isolated with amplifier buffer. The output current is
proportional to the charges that have been collected on the phototransistor’s
base through a photon-to-electron conversion process. These charges on
the base draw signal current through the emitter proportionally to the Beta of
the phototransistor. Then the emitter current flows out onto the output video
line capacitance where it is integrated and converted to signal voltage. This
is the signal voltage that the host receiver senses. Before accessing the
subsequent pixel, this video signal on the video line capacitance is reset
through a shunt switch on the video line. Then the next pixel in sequence is
readout onto the video line. This video buffer amplifier terminating the video
line provides the necessary amplification. Most user generally set their
operating output signal to ~ 1.0 V peak average with the saturation level of ~
1.5 V. For the circuit reference see the attached schematic diagram on
page 6. Typical amplification (adjustable) gain is between 4 to 5 times the
voltage that is measured on the video line.
(4) Up = [( Vpmax-Vp)/ Vp]x100%
Or [( Vp-Vpmin)/ Vp]x100%
N
∑ Where Vp = Vpn / N
n
Vpmax is the maximum pixel output voltage in the light.
Vpmin is the minimum pixel output voltage in the light.
In the light means module exposed a uniform light.
(5) Vd = ( Vdmax+Vdmin)/2
Vdmax is the maximum pixel output voltage in the dark.
Vdmin is the minimum pixel output voltage in the dark.
In the dark means that sensor has no exposure to the light.
(6) Ud = [( Vdmax-Vdmin)/ Vd]x100%
Absolute Maximum Ratings (not operational conditions):
Parameters
Power Supply Voltage
Power Supply Current
Input clock pulse (high level)
Input clock pulse (low level)
VDD
IDD
Vih
Vil
Symbol
Maximum Rating
10
<2.0
Vdd + 0.5
-0.25
Table 3. Maximum Specification
Page 3 of 7 - PI3034A, 06/15/03
Units
Volts
ma
Volts
Volts