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| TM 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 sec/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 subcascaded 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 123 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 m 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 sec 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 Parameter PI228MC-A4 Symbol High Power Yellow-Green LED Value Units 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) Tint(1) 90 sec MHz Volt % mV mV % @ 5.0 MHz clock frequency Fclk Video Output Up Ud Dark Level (DL) MTF 5.0 0.5 <+/-30 <40 <60 >40 Table 5C. PI228MC-A4 Electro-Optical Characteristics See notes below Table 5D. Parameter PI229MC-A4 Symbol Low Power Yellow-Green LED Symbol Units Notes 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) Tint(1) 150 sec MHz Volt % mV mV % @ 3.0 MHz clock frequency Fclk Video Output Up Ud Dark Level (DL) MTF 3.0 0.5 <+/-30 <40 <60 >40 Table 5D. PI229MC-A4 Electro-Optical Characteristics Definition: (1) Tint is the line scanning rate or integration time. Tint is determined by the interval between two start pulses, SP. (2) Fclk: main clock frequency also equals the video sampling frequency. (3) Video output level is controlled with a voltage adjustment as well as the Integration time and LED light power. (4) Up = [Vp(max) - Vpavg]/Vpavgx100% or [Vpavg-Vp(min)]/Vpavg}x100%, whichever is greater is selected. Where Vp(max) = maximum pixel level and Vp(min) = minimum pixel level. and Vpavg = Vp(n) / 5184 n=1 (5) Ud = Vdmax - Vdmin Vdmin is the minimum output voltage with LED off. Vdmax is maximum output voltage with LED on. (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 or near ground, 0V. Note the gain is adjustable on each output. However, it is recommended that the gain should not be increased above the level where the reset ground level starts to increase above zero. (7) A graph of the typical MTF vs DOF is shown under discussion of MTF in Figure 5. PAGE 6 OF 10 - PI227/228/229, 01-31-04 n5184 MTF Graph and Its Discussion TYPICAL MTF VS DEPTH OF FOCUS 60 50 40 30 20 10 0 0 0.2 0.4 0.6 DEPTH FROM THE WINDOW SURFACE(mm) MTF IN % Item Power Supply Figure 3. Typical MTF versus Distance See Figure 3, Typical MTF versus Distance. This graph essentially shows the working depth-of-focus. Two curves indicates the spread among the modules. Note that MTF is greater than 40% out to distance greater than 0.4 mm from the glass surface. Since this module is a 200DPI module, a pixel density of 200 pixel per inch, the MTF was measured with a 100 DPI or a 50 line-pair per inch optical bar pattern. The test was conducted with 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 nth pixel. Operating Conditions (25 C) Symbol Vdd (positive) Vn (negative) Idd (positive) In (negative)(1) Input voltage at digital high Vih Input voltage at digital low Vil Clock frequency Fclk Min 4.5 -10 60 20 Vdd-1.0 0 0.2 (2) Typical 5.0 -5 66 20 Vdd-.5 Max 5.5 -4.0 75 20 Vdd 0.6 5.5(3) Units V V ma ma V V MHz PAGE 7 OF 10 - PI227/228/229, 01-31-04 Clock pulse high duty cycle Clock pulse high duration Integration time Operating temperature(4) PI227MC-A4 Parameter VLED ILED PI228MC-A4 Minimum VLED ILED PI229MC-A4 Minimum VLED ILED 25 45.5 82 50 150 25 % ns s o C Tint Top 50 Minimum Typical 5.0 480 Maximum 5.5 550 Volts ma Typical 5.0 650 Maximum 5.5 950 Volts ma Typical 5.0 650 Maximum 5.5 950 Volts ma Table 6. Recommended Operating Condition (25 o C ) Note (1) current is essential constant current with supply voltage. Note (2) determined by the longest tolerable integration time. Because of leakage current build up, the integration time is recommended to be no greater than 10 ms. Note (3) the maximum call out is for the modules' electrical speed. Light Source still dictates the highest speed performance. Note (4) this specification is a standard used by the CIS makers for the Fax Industry. Switching Characteristics (25C) The Switching Characteristics (25C) for the I/O clocks are shown in the diagram of Figure 4, on the following page. Each switch timing characteristic for each waveform is represented by their symbolic acronym. Each corresponding switching time is defined in the Table 7, located below Figure 4. Note: Only one video output is shown because all four videos have identical electrical characteristic. 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. (See Figure 4 on the following page) PAGE 8 of 10 - PI227/228/229, 01-31-04 to CP tprh tdh SP tds Vout tsh tw tdl MODULE TIMING DIAGRAM Figure 4 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 tds tdh tdl tsh Min. 0.20 50 25 0 20 0 20 100 Typical Max. 4.0 75 Units s ns % ns ns ns ns ns Table 7. Timing Symbol's Definition and Timing Values. Note1: "Prohibit crossing of start pulse" is to indicate that the start pulse should not be active high between any two consecutive clock pulse, specifically, between two consecutive low going clock pulses. See the timing diagram. All falling clock edges under a active high start pulse loads the internal shift register, therefore the start pulse must be active over only one falling clock edge. High start pulse over all rising clock edge is ignored by the shift register. One simple way to ensure that the start pulse will not be actively high during two consecutive falling clock edge is to generate the start pulse on a rising clock edge and terminate it on the following rising clock edge. PAGE 9 OF 10 - PI227/228/229, 01-31-04 Mechanical Structure of the Module The isometric sketch, Figure 5, of the housing shows the connector location, the approximate overall dimensions and its general geometric layout of the module. It is not intended for use as a design reference. The detailed drawing for the any of the PI227/228/229 Module Mechanical Overview is available upon request. 23 2 AN N SC CTIO E R DI PIN 1 END VIEW 22.0mm 21.5mm co e nn cto r THE SURFACE OF THE GLASS Figure 5. PI227/228/229 Module Mechanical Overview (c)2001- 04 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 10 OF 10 - PI227/228/229, 01-31-04 |
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