AMIS-710228中文资料
1.0 General Description
The AMIS-710227 (PI227MC-A4), AMIS-710228 (PI228MC-A4) and AMIS-710229 (PI229MC-A4) are a family of contact image sensor (CIS) modules. As a family group they are called AMIS-710227/228/229 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 give this family of CIS modules their high-speed performance. 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 (216mm) documents with 8 dots per millimeter (dpm) resolution. Applications include document scanning, mark readers, gaming and office automation equipment.
2.0 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
? 90μsec/line scanning speed @ 5.0MHz clock rate with optional light sources, selected from the option of three above modules
? 8dpm resolution, 216mm scanning length
? Wide dynamic range
? LED light source (selectable among the three above modules)
? Standard A4 size ? 14mm x 19mm x 232mm
? Low power
? Light weight
3.0 Functional Description
Each of the three modules in the family, AMIS-710227/228/229, consists of four major components. The first of them is the printed circuit board (PCB) on which the 27 imaging chips, AMIS-720220 (PI3020), are bonded. These sensor chips, produced by AMI Semiconductor, are monolithic devices with 64 photo-sensing elements. Each of 27 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-element modules. The AMIS-720220 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 element 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 chips completes its scan. These 27 sensors, bonded on a PCB, are grouped into four sub-cascaded sections. Each contiguously cascaded chips section is connected on separate video lines, resulting in four video outputs VOUT1, VOUT2, VOUT3, and VOUT4. Before the signal, charges from the four video lines appear at their respective outputs where 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 seven sensor chips, while the VOUT4 has six sensor chips. Since each sensor chip has 64 pixels, there are a total of 1728 pixels. See Figure 1.
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. 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 Section 10: MTF Graph and its Discussion.
4.0 I/O Designation
I/O to the module is a 12-pin connector located on one end of the module. See Figure 6. Table 4-A lists the pin numbers and their designations for the I/O connector. It is JAE IL-Z-12P-S125L3-E connector.
Table 4-A: Pin Configuration
Pin Number Symbol Names and Functions
1 VOUT1 Analog video output 1
2 VOUT2 Analog video output 2
0V
Ground;
3 GND
4 VOUT3 Analog video output 3
5 VOUT4 Analog video output 4
6 Vdd Positive power supply
7 SP (START) Shift register start pulse
8 GND Ground; 0V
9 CP (CLOCK) Sampling clock pulse
10 Vn Negative power supply
11 GLED Ground for the light source; 0V
12 VLED Supply for the light source
5.0 Module vs LED Light Source
Table 5-A lists the LED light source associated with each module model
Table 5-A: Module vs. LED Light Source Module
LED Light Source AMIS-710227 660nm Red LED bar
AMIS-710228 High power Yellow-Green LED bar AMIS-710229
Low power Yellow-Green LED bar
6.0 Absolute Maximum Rating
Table 6-A shows the absolute maximum ratings. The parameters are common to all three modules. Table 6-B shows the absolute maximum ratings that are different among the three modules.
Table 6-A: Electrical Absolute Maximum Rating Parameter Symbols Maximum Rating Units Vdd 7 V
Idd 100 ma Vn -15 V
Power supply In 35 ma
Input clock pulse (high level) Vih Vdd – 0.5 V Input clock pulse (low level)
Vil
-0.5
V
Note: These parameters are absolute maximums; do not operate under these conditions.
Table 6-B: LED Power Absolute Maximum Rating Parameter Symbols Maximum Rating Units Module AMIS-710227 AMIS-710228 AMIS-710229 VLED 6.0 6.0 6.0 V
Power supply: LED light source ILED 0.7 1.0 1.0 amp
Note: These parameters are absolute maximums; do not operate under these conditions.
7.0 Environmental Specifications
Table 7-A: Operating and Storage Environment
Parameter Symbols Maximum Rating Units Operating temperature(1)Top 0 to 50 °C Operating humidity(1)Hop 10 to 90 % Storage temperature(1)Tstg -20 to +75 °C Storage humidity(1)Hstg 10 to 90 % Note:
1. These are standard specifications for the CIS modules.
8.0 Electro-Optical Characteristics (25°C)
Table 8-A is the electro-optical characteristics common all three modules. Table 8-B, Table 8-C and Table 8-D show the different characteristics for each of the three LED light sources.
Table 8-A: Common Electro-Optical Characteristics
Parameter Symbol Value Units Notes
Total number of photo detectors 1728 Elements
448 Elements
Section 1, 2 & 3 number of photo
detectors
Section 4 number of detectors 384 Elements
Pixel-to-pixel spacing 125 μm
Table 8-B: AMIS-710227 Electro-Optical Characteristics
AMIS-710227 660 RED LED
Parameter Symbol Value Units Note
Line scanning rate Tint(1)90 μsec @ 5.0MHz
clock frequency
Clock frequency(2)Fclk 5.0 MHz
Bright output voltage(3)Video output 1.0 Volt
Bright output non-uniformity(4)Up <+/-30 %
Dark non-uniformity(5)Ud <40
mV
Dark output voltage(6)Dark level (DL) <200 mV
%
Modulation transfer function(7)MTF >40
See notes below Table 8-D
Table 8-C: AMIS-710228 Electro-Optical Characteristics
AMIS-710228 High Power Yellow-Green LED
Parameter Symbol Value Units Note
Line scanning rate Tint(1)90 μsec @ 5.0MHz
clock frequency
Clock frequency(2)Fclk 5.0 MHz
Bright output voltage(3)Video output0.5 Volt
Bright output non-uniformity(4)Up <+/-30 %
mV
Dark non-uniformity(5)Ud <40
Dark output voltage(6)Dark level (DL) <200 mV
%
Modulation transfer function(7)MTF >40
See notes below Table 8-D
Table 8-D: AMIS-710229 Electro-Optical Characteristics
AMIS-710229 Low Power Yellow-Green LED
Parameter Symbol Symbol Units Notes
Line scanning rate Tint(1)150 μsec @ 3.0MHz
clock frequency Clock frequency(2)Fclk 3.0 MHz
Bright output voltage(3)Video output 0.5 Volt
Bright output non-uniformity(4)Up <+/-30 %
mV Dark non-uniformity(5)Ud <40
Dark output voltage(6)Dark level (DL) <200 mV
% Modulation transfer function(7)MTF >40
Definition:
1. Tint is the line scanning rate or integration time. Tint is determined by the interval between two SP.
2. Fclk: main clock frequency, also equals the video sampling frequency
3. The video output level is controlled with a voltage adjustment as well as the Integration time and LED light power.
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 is maximum output voltage with LED on.
6. See paragraph under Reset Level and Video Sampling Time.
7. See Section 10: MTF Graph and its Discussion. A graph of the typical MTF vs. DOF Graph is depicted with discussion.
9.0 Reset Level and Video Sampling Time
Figure 3 graphically shows the video signal waveform and defines the single video pixel structure. The signal output waveform is shown relative to the input clock waveform as well as the symbols and terminologies used to define the performance specifications. Figure 3 serves to explain the terminology used to characterize the dark signal levels and the recommended video pixel sampling times.
Note 6, under Table 8-D, specifies the dark level (DL). This is the level during the dark read-out, i.e., either the module sits on black target or the light source is turned off. It is measured from ground or 0V. The reset level is a reference level for the reset switch which is not necessarily on ground because after the reset the signal is passed through an amplifier. The difference between the dark level and the reset level is called the pedestal (PED). In most cases, the offset control of the amplifier is used to adjust the dark level to 0V or ground. Hence, the reset level will sit below ground.
The video pixels demonstrated in this graph emanate from an ideal CIS module with a phototransistor imaging structure. The video output at high speeds, such as 5.0MHz, does not instantly rise to its final value. Given enough time, it would asymptotically approach its steady state value. But, at high speeds it is impractical to wait for a final stable value. Accordingly, as Figure 3 indicates, the output signal continues to rise towards its steady state value. Consistent with the forgoing comments, in Note 7 under Table 8-D, instead of the conventional signal sampling time (tsst) is defined to substitute the conventional settling time definition. This definition is used because the output signal continues to rise asymptotically to the final stable value, but not within a practical time in high speed applications. This is true even when the video rises to its peak value (Vp) indicated on the MTF Graph, see Figure 4.
10.0 MTF Graph and its Discussion
This graph essentially shows the working depth-of-focus. Two curves indicate the spread among the modules. Note that MTF is greater than 40 percent out to a distance greater than 0.4mm from the glass surface. Since this module is a 200dpi module, a pixel density of 200 pixels per inch, the MTF was measured with a 100dpi or a 50 line-pair per inch optical bar pattern. The test was conducted with the pixel rate set to 2.5MHz.
The effective algorithm used in the measurements is as described by the following equation:
MTF={[Vp(n)+Vp(n+1)]/2-[Vp(n+2)+Vp(n+3)]/2}/{[Vp(n)+Vp(n+1)]/2+[Vp(n+2)+Vp(n+3)]/2}
Where n is 1, 2, .....1728th, Vp(n) is the signal amplitude of the n th pixel.
Where n is 1, 2, .....1728th, Vp(n) is the signal amplitude of the n th pixel.
11.0 Operating Conditions (25°C)
Table 11-A: Recommended Operating Conditions (25°C):
Item Symbol Min. Typ. Max. Units
Power supply
Vdd (positive) 4.5 5.0 5.5 V
Vn (negative) -10 -5 -4.0 V
Idd (positive)60 66 75 ma
In (negative)(1)20 20 20 ma
Input voltage at digital high Vih Vdd-1.0 Vdd-0.5 Vdd V
Input voltage at digital low Vil 0 0.6 V
Clock frequency Fclk 0.2(2) 5.5(3)MHz
Clock pulse high duty cycle 25 %
Clock pulse high duration 45.5 50 ns
Integration time Tint 82 150 μs
Operating temperature(4)Top 25 50 °C
Table 11-B: AMIS-710227 Operating Conditions (25°C)
AMIS-710227
Parameter Min. Typ. Max.
5.5
V VLED
5.0
ILED 480 550 ma
Table 11-C: AMIS-710228 Operating Conditions (25°C)
AMIS-710228
Min. Typ. Max.
V VLED
5.5
5.0
ILED TBD TBD ma
Table 11-D: AMIS-710229 Operating Conditions (25°C)
AMIS-710229
Min. Typ. Max.
5.5
V
5.0
VLED
ILED TBD TBD ma
Notes:
1. Current is essential constant current with supply voltage
2. Determined by the longest tolerable integration time, because of leakage current build up, the integration time is recommended to be no greater than 10ms
3. The maximum call out is for the modules' electrical speed. The light source still dictates the highest speed performance.
4. This specification is a standard used by the CIS makers for the Fax Industry.
12.0 Switching Characteristics (25°C)
The switching characteristics (25°C) for the I/O clocks are shown in the diagram of Figure 5. Each switch timing characteristic for each waveform is represented by its symbolic acronym. Each corresponding switching time is defined in the Table 12-A. Note: Only one video output is shown because all four videos have identical electrical characteristics. The only physical difference is in Section 4,
output, VOUT4. Section 4 has only 6 sensor chips, hence its active scan is shorter by 64 pixels.
13.0 Mechanical Structure of the Module
The isometric sketch, Figure 6, of the housing shows the connector location, the approximate overall dimensions and the general geometric layout of the module. It is not intended for use as a design reference. The detailed drawing for any of the AMIS-710227/228/229 modules is available upon request.
14.0 Company or Product Inquiries
For more information about AMI Semiconductor, our technology and our product, visit our Web site at: https://www.sodocs.net/doc/083170927.html, North America
Tel: +1.208.233.4690
Fax: +1.208.234.6795
Europe
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Fax: +32 (0) 55.31.81.12
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