PI214MC-DR Datasheet, PDF (5/8 Pages) AMI SEMICONDUCTOR – 200DPI CIS Two Level Digital Output Module

• VN : This is the input for the -5 Volts negative supply.
• VLED: This is the input for the +5 Volts power supply for the LED light source.
Note: Power return for the LED light source is GLED on Pin 13 &14, where as the rest
of ground returns are on Pins 1,2,4 & 8.
Video Output:
DIGOUT on pin 3 of the I/O connector is the only output I/O. Pin 3 is the digital video
output from the CIS module. Reflection off the dark target produces a digital signal of “0”
level, while the white reflection off the white target produces a digital level of “one”. The
amplitudes of the white and dark are listed in the table below:
Electro-Optical Characteristics (25° C)
Table 2. Electro-optical characteristics at 25° C.
Parameter
Number of photo detectors
Pixel to pixel spacing
Line scanning rate
Symbol
Tint ⁽¹⁾
Clock frequency
Bright output
Dark output
f
Digital Video
Output Signal
Parameter
1728
125
440
Units
elements
µm
µsec
4.0
MHz
>3.2
Volts
<0.8
Volts
Note
@ 4.0 MHz
clock
frequency
(1) The Tint is specified with a 4.0 MHz clock frequency. In operation the time constants
in the reference generator is set to match the initial exposure time, hence of the
generator’s time constant will determine the optimum integration time. Note, the
integration time is also a function of the clock frequency. Accordingly it is highly
recommended that the parameters be factory adjust for the specific applications.
Table 3. Recommended Operating Conditions (25 °C)
Item
Power Supply
Input voltage at digital high
Input voltage at digital low
Clock frequency
Symbol Min
Mean
Max
Vdd
5.0
Vn.
-5.0
VLED
5.0
Idd
35
Ivn
20
ILED
450
500
Vih
Vdd-1.0 Vdd-.5 Vdd
Vil
0
0.8
f
4.0
Page 5 of 8 PI214MC-DR, 11/29/99
Units
V
V
V
mA
mA
mA
V
V
MHz