™
Peripheral
Imaging
Corporation
PI400M-A4
400DPI CIS Module
Engineering Data Sheet
Key Features
• Light source, lens, and sensor are integrated into a single module
• 15.7 dpm resolution, 216 mm scanning length
• 700µsec/line scanning speed @ 5.0 MHz Clock Rate
• Wide dynamic range
• Analog output
• Yellow-Green light source 575nm
•Compact size ≅14.6 mm x 19.5 mm x 232 mm
• Low power
• Light weight
General Description
The PI400M-A4 is a CIS module. It is a long contact image sensor, using MOS image
sensor technology for high-speed performance and high sensitivity. The PI400M-A4 is
suitable for scanning A4 size (216 mm) documents with 15.7 dots per millimeter
resolution. Applications include document scanning, mark readers, gaming and office
automation equipment.
Functional Description
The PI400M-A4 imaging array consists of 27 sensors that are cascaded to provide 3456
photo-detectors with their associated multiplex switches, and a digital shift register that
controls its sequential readout. Mounted in the module is one-to-one graded indexed
micro lens array that focuses the scanned documents to image onto its sensing plane.
PAGE 1 OF 7 - PI400M-A4, 11-15-00
The on-board amplifier processes the video signal to produce a sequential stream of video
at the video output pin of the PI400M-A4 module.
Illumination is by means of an integrated LED light source. All components are housed in
a small plastic housing which has a cover glass which acts as the focal point for the object
being scanned and protects the imaging array, micro lens assembly, and LED light source
from dust. I/O to the module is the 10-pin connector located on one end of the module.
See Figure 4, Mechanical Structure on the last page. The cross section of the PI400M-A4
is shown in Figure 1 and the block diagram in Figure 2.
DOCUMENT SURFACE
GLASS WINDOW
ROD LENS
MODULE HOUSE
LIGHT PATH
D
LE
R
BA
SENSORS
PCB
INSIDE PICTORIAL OF MODULE
Figure 1. PI400M-A4 Cross Section
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GLED
LED
LED
LED
LED
LED
LED
LED
LED
VLED
ROD LENS
3454
PHOTO SENSORS
1
2
3
4
5
3455
3456
----------------
VIDEO
LINE
VN(-V)
VDD (+5)
SHIFT REGISTER
GRD
BUFFER
CP
VIDEO AMPLIFIER
SP
VOUT
GRD
Figure 2. PI400M-A4 module block diagram.
(See Table 1 below for pin configuration)
Pin Number
1
2
3
4
5
6
7
8
9
10
Symbol
Vout
Gnd
Vdd (+5V)
Vn (-5V to –12V)
Gnd
SP
Gnd
CP
GLED
VLED
Names and Functions
Analog Video Output
Ground; 0V
Positive power supply
Negative power supply
Ground; 0V
Shift register start pulse
Ground; 0V
Sampling clock pulse
Ground for the light source; 0V
Supply for the light source
Table 1. Pin configuration
Absolute Maximum Rating:
Parameter
Power supply
voltage
Input clock pulse
(high level)
Symbols
Vdd
Idd
Vn
In
VLED
ILED(1)
Vih
Maximum Rating
10
60
-15
10
6V
250
Vdd – 0.5V
PAGE 3 OF 7 - PI400M-A4, 11-15-00
Units
V
ma
V
ma
V
ma
V
Input clock pulse
(low level)
Vil
-0.5
V
Table 2. Absolute Maximum Rating
Note (1) LED light source is for current controlled operation. The output video
is adjusted to 1.0 Volt maximum, using standard white document - similar to
white typing paper.
Environmental Specifications
o
Operating
Top
0 to 50 (TBD)
C
temperature(1)
Operating
Hop
10 to 85 (TBD)
%
humidity(1)
o
Storage
Tstg
-25 to+75 (TBD)
C
temperature(1)
Storage humidity(1) Hstg
5 to 95 (TBD)
%
Table 3. Operating and Storage Environment
Note (1) These are standard specifications for the CIS modules. The TBD is
to shows that these parameters will be tested later and added to our data
sheet.
Electro-Optical Characteristics (25
° C)
Parameter
Symbol
Number of photo detectors
Pixel to pixel spacing
Line scanning rate
Tint(1)
Parameter
3456
63.5
864
Units
elements
µm
µsec
Clock frequency(2)
Bright output voltage(3)
Bright output
nonuniformity(4)
Dark nonuniformity(5)
Dark output voltage(6)
Modulation transfer
function(7)
f
Video Output
Up
4.0
1.0
<50
MHz
Volts
%
Ud
Dark Level
MTF
150
100
>30
mV
mV
%
Note
@ 4.0 MHz
clock
frequency
Table 4. Electro-optical characteristics at 25° C.
Definition:
(1) Tint: line scanning rate or integration time. Tint is determined by the interval between
two start pulses (SP).
PAGE 4 OF 7 - PI400M-A4, 11-15-00
(2) f: main clock frequency also equals the video sampling frequency.
(3) Video output level is controlled with LED current source.
(4) Up = {[Vp(max) –Vp(min)]/Vp(max)}x100%
Where VP(max) = maximum peak pixel and VP(min) = minimum pixel.
(5) Ud = Vdmax – Vdmin
Vdmin is the minimum output voltage with LED off.
Vdmax: maximum output voltage with LED off
(6) This level is measured from the reset level that is located between the pixels, during
the pixel reset duration. The reset level is at ground, 0V. It can be adjusted with offset
potentiometer located on the module.
(7) MTF = [(Vp(n) – Vp(n+1)] / (Vp(n)+ Vp(n+1)] x 100 [%]
Vp(n): nth maximum output pixel from a 8.0 lp/mm target.
V(n+1)th: (n+1)th minimum output pixel from a 8.0 lp/mm target.
(8) lp / mm: line pair per mm
Recommended Operating Conditions (25
°C)
Item
Power Supply
Input voltage at digital high
Input voltage at digital low
Clock frequency
Clock pulse high duty cycle
Clock pulse high duration
Integration time
Operating temperature(1)
Symbol
Vdd
Vn.
Idd
ILED
VLED
Vih
Vil
f
Tint
Top
Min
4.5
-4.5
Typical
5.0
-5
Max
5.5
-12
250
Vdd-1.0
0
0.5
+5.0
Vdd-.5
4.0
25
62.5
864
25
Vdd
0.8
5.0
50
Table 5. Recommended Operating Condition (25 0C)
Note (1) see the note under the Table for Operating and Storage Environment.
PAGE 5 OF 7 - PI400M-A4, 11-15-00
Units
V
V
ma
ma
V
V
V
MHz
%
ns
µs
0
C
Switching Characteristics (25°C)
tw
to
CP
tprh
tdh
SP
tdl
tds
Vout
tsh
MODULE TIMING DIAGRAM
Figure 3
The Switching Characteristics (25°C) for the I/O clocks are shown in the diagram below.
For the timing symbol definitions see the following table below the timing diagram.
Item
Clock cycle time
Clock pulse width
Clock duty cycle
Prohibit crossing time
of Start Pulse(1)
Data setup time
Data hold time
Signal delay time
Signal settling time
Symbol
to
tw
tprh
Min.
0.20
50
25
0
tds
tdh
tdl
tsh
20
0
20
100
Typical
Max.
2.0
75
Units
µs
ns
%
ns
ns
ns
ns
ns
Table 6. Timing Symbol’s Definition and Timing Values.
Note:
(1) "Prohibit crossing of start pulse" is to indicate that the start pulse should not be
active high between any two consecutive high going clock pulse or two
consecutive low going clock pulses. See the timing diagram. Only one high going
clock under the active high start pulse initiates the internal shift register, and it
must not be active over two high going clocks. All low going clock pulses will not
initiate the shift register, but to ensure that the start pulse will not be actively high
during two consecutive high going clocks, the circuit should be design to keep the
start pulse active only for one low going clock cycle.
PAGE 6 OF 7 - PI400M-A4, 11-15-00
Mechanical Structure of the Module
For PI400M-A4 Module’s dimensions see the Figure 4 Mechanical Structure.
SC
23
82
PI
N
2
82
.5
R
DI
19.5
SIDE
TAPE
m
2m
10 ctor
1 X onne
c
11.5
+/-0.2
E
N
END VIEW
14.6 +/- 0.3
R
LIN
TIO
1
1X1-M2 TAPSIZE USE(DP6)
D
EA
EC
.5
Æ1.65+/- HOLE
6.0
AN
Æ2.2+/-0.05 HOLE
6.8+/-0.2
15.5+/-0.2
THE SURFACE
OF THE GLASS
2X2-M2.6 TAPSIZE USE (DP6)
MECHANICAL STRUCTURE
FIGURE 4
©2000 Peripheral Imaging Corporation. Printed in USA. All rights reserved. Specifications
are subject to change without notice. Contents may not be reproduced in whole or in part without
the express prior written permission of Peripheral Imaging Corporation. Information furnished
herein is believed to be accurate and reliable. However, no responsibility is assumed by Peripheral
Imaging Corporation for its use nor for any infringement of patents or other rights granted by
implication or otherwise under any patent or patent rights of Peripheral Imaging Corporation.
PAGE 7 OF 7 - PI400M-A4, 11-15-00