™
Peripheral
Imaging
Corporation
PI227MC-A4 / PI228MC-A4 / PI229MC-A4 CIS Module
200DPI CIS Sensor
Engineering Data Sheet
Key Features
•
•
•
•
•
•
•
•
•
•
Light source, lens, and sensor are integrated into a single module
Ultra-High-Speed
Four parallel analog video outputs clocked at 5.0MHz.
90
µsec/line
scanning speed @ 5.0MHz clock rate with optional light sources, selected
from the option of three above modules.
8 dpm resolution, 216 mm scanning length
Wide dynamic range
LED light source (selectable among the three above modules)
Standard A4 size
≅
14mm x 19 mm x 232 mm
Low power
Light weight
General Description
The PI227MC-A4, PI228MC-A4 and PI229MC-A4 are a family of CIS modules. As a
family group they are called PI227/228/229 modules. They are long contact image sensor
modules, using MOS image sensor technology for high-speed performance and high
sensitivity. They contain their own complete optical system including the light source,
accordingly, they make a very compact imaging system. The four parallel video outputs
gives these family of CIS modules their high speed performances. They all possess
identical electrical circuit components, as well as the mechanical and optical components,
except for their LED light sources. Accordingly they differ in their specification because the
different light sources limits the effective high speed performance. The three modules are
suitable for scanning A4 size (216 mm) documents with 8 dots per millimeter resolution.
PAGE 1 OF 10 - PI227/228/229, 01-31-04
Applications include document scanning, mark readers, gaming and office automation
equipment.
Functional Description
Each of the three modules in the family, PI227/228/229, consist of four major components.
The first of them is the PCB on which the 27 imaging chips, PI3020, are bonded. These
sensor chips, produced by Peripheral Imaging Corporation, are monolithic devices with 64
photo sensing elements. Each of twenty seven chips are complete self contained
scanning chips and have their control circuits integrated in the chips, so that they can be
cascaded to provide 1728 photo-elements module. The PI3020 chips are integrated with
the photo sensors' associated multiplex switches, a digital shift register and chip selection
switch. The chip's shift register sequentially clocks out the integrated image charges from
each sensing elements and passes them through the chip-select switch and out onto the
video line. The chip-select switches are sequentially switched as each of the predecessor
chip completes its scan. These 27 sensors, bonded on a PCB, are grouped into 4 sub-
cascaded sections. Each contiguously cascaded chips section are connected on
separate video lines, accordingly providing four video outputs VOUT1, VOUT2, VOUT3
and VOUT4. Before the signal charges from the four video lines appear at their
respective outputs they are converted to signal voltages by four on-board buffer
amplifiers, one for each of its corresponding video section. The first three sections
VOUT1, VOUT2, and VOUT3 have 7 sensor chips, while the VOUT4 has 6 sensor chips.
Since each sensor chip have 64 pixels, there are a total of 1728 pixels. See Figure 1.
PI227/228/229 Module Block Diagram.
GLED
VLED
VN(-V)
LED
LED
LED
LED
LED
LED
LED
LED
VDD(+5)
GRD
1728
AMPL 1
AMPL 2
ROD LENSE
PHOTO SENSORS
1 2 3
VOUT1
VOUT2
VOUT3
VOUT4
SHIFT REGISTER
BUFFER
VIDEO 1 PIXEL 1 TO 448
VIDEO 2 PIXEL 449 TO 896
VIDEO 3 PIXEL 897 TO 1344
VIDEO 4 PIXEL 1345 TO 1728
AMPL 3
AMPL 4
CP
SP
GRD
Figure 1. PI227/228/229 Module Block Diagram
(See Table 1 for pin-out designation)
PAGE 2 OF 10 - PI227/228/229, 01-31-04
Mounted in the module housing, along with the PCB, is the second major component , it is
a one-to-one graded indexed micro lens array that focuses the scanned documents'
image onto the sensing line of the sensor chips. The third major component, mounted in
the module, is the LED light source. See Figure 2. The PI227/228/229's Cross Sectional
View. This pictorial cross section shows the LED Bar light source and its Illumination path
as it reflects the image from the document and focuses through the ROD lens on to its
image sensing line of the sensing chips. All components are housed in a small plastic
housing and covered with the fourth major component, a glass window. This cover glass
not only serves to protect all of the critical components within the housing from dust, but
also serves a minor role in the optical system. Together with rest of the module's optical
system, the module is adjusted to obtain the optimum depth-of-focus. See the paragraph
on MTF Graph and Its Discussions.
DOCUMENT SURFACE
GLASS WINDOW
LIGHT PATH
MODULE HOUSE
ROD LENS
D
LE
R
BA
SENSORS
PCB
INSIDE PICTORIAL OF MODULE
Figure 2. PI227/228/229's Cross Section
I/O
Designation
I/O to the module is a 12-pin connector located on one end of the module. See Figure 5.
Module's Mechanical Overview. Table 1 lists the pin numbers and their designations for
the I/O connector. It is JAE IL-Z-12P-S125L3-E connector.
Pin Number
1
2
3
4
5
6
Symbol
VOUT1
VOUT2
GND
VOUT3
VOUT4
Vdd
Names and Functions
Analog Video Output 1
Analog Video Output 2
Ground; 0V
Analog Video Output 3
Analog Video Output 4
Positive power supply
PAGE 3 OF 10 - PI227/228/229, 01-31-04
7
8
9
10
11
12
SP(START)
GND
CP(CLOCK)
Vn
GLED
VLED
Shift register start pulse
Ground; 0V
Sampling clock pulse
Negative power supply
Ground for the light source; 0V
Supply for the light source
Table 1. Pin configuration
Module Versus LED Light Source
Table 2 lists the module's model and its corresponding LED Light Source.
Module
PI227MC-A4
PI228MC-A4
PI229MC-A4
LED Light Source
660 nm RED LED Bar
High power Yellow-Green LED Bar
Low power Yellow-Green LED Bar
Table 2. Module Vs LED Light Source
Absolute Maximum Rating:
Table 3A shows the absolute maximum ratings. The parameters are common to all three
modules. Table 3B shows the absolute maximum ratings that are different among the
three modules.
Parameter
Power Supply
Symbols
Vdd
Idd
Vn
In
Vih
Vil
Maximum Rating
7
100
-15
35
Vdd – 0.5V
-0.5
Units
V
ma
V
ma
V
V
Input clock pulse
(high level)
Input clock pulse
(low level)
Note: These parameters are absolute maximums do not operate under these conditions.
Table 3A. Electrical Absolute Maximum Rating
Parameter
Symbols
Power Supply:
Module
LED light source VLED
ILED
Maximum Rating
PI227MC-A4 PI228MC-A4
6.0
6.0
0.7
1.30
Units
PI229MC-A4
6.0
1.30
V
A
Note: These parameters are absolute maximums do not operate under these conditions
.
Table 3B. LED Power Absolute Maximum Rating
PAGE 4 OF 10 - PI227/228/229, 01-31-04
Environmental Specifications
Operating
temperature
(1)
Operating
humidity
(1)
Storage
temperature
(1)
Storage humidity
(1)
Top
Hop
Tstg
Hstg
0 to 50
10 to 90
-20 to+75
10 to 90
0
C
%
0
C
%
Table 4. Operating and Storage Environment
Note (1) These are standard specifications for the CIS modules
.
Electro-Optical Characteristics (25 °C)
Table 5A is the electro-optical characteristics common all three modules. Table 5B, 5C
and 5D show the different characteristics for each of the three LED light source.
Parameter
Total number of photo
detectors
Section 1, 2, & 3 number
of photo detectors
Section 4 number of
detectors
Pixel-to-pixel spacing
Symbol
Value
1728
448
384
125
Units
Elements
Elements
Elements
µm
Notes
Table 5A. Common Electro-Optical Characteristics
PI227MC-A4
Symbol
660 RED LED
Value
Units
Parameter
Note
Line scanning rate
Clock frequency
(2)
Bright output voltage
(3)
Bright output
nonuniformity
(4)
Dark nonuniformity
(5)
Dark output voltage
(6)
Modulation transfer
function
(7)
See notes below Table 5D.
Tint
(1)
90
µsec
MHz
Volt
%
mV
mV
%
@ 5.0 MHz
clock
frequency
Fclk
Video Output
Up
Ud
Dark Level (DL)
MTF
5.0
1.0
<+/-30
<40
<60
>40
Table 5B. PI227MC-A4 Electro-Optical Characteristics
PAGE 5 OF 10 - PI227/228/229, 01-31-04
