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| TM Peripheral Imaging Corporation PI225MC-A6 CIS Module 200DPI CIS Sensor Engineering Data Sheet Key Features * Light source, lens, and sensor are integrated into a single module * 8 dpm resolution, 104 mm scanning length * High Speed Page Scan - up to 167 sec/line @ 5MHz pixel rate * Wide dynamic range * Analog output * Red LED light source * Compact size 14 mm x 19 mm x 120 mm * Low power * Light weight General Description The PI225MC-A6 is a contact imaging sensor, CIS, module, which is composed of 13 PI3020 sensor chips. The PI3020 is a 200 DPI solid-state line imaging array, also a product of Peripheral Imaging Corporation. This imaging device is fabricated using MOS imaging sensor technology for high-speed performance and high sensitivity. The PI225MC-A6 is suitable for scanning A6 size (104 mm) documents with 8 dots per millimeter resolution. Applications include ticket, check and card scanners, variety of mark readers, and other automation equipment. Functional Description The PI225MC-A6 imaging array consists of 13 sensors that are cascaded to provide 832 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 PAGE 1 OF 6 - PI225MC-A6, 8/25/00 micro lens array that focuses the scanned documents to image onto its sensing plane. The on-board amplifier processes the video signal to produce a sequential stream of video at the video output pin of the PI225MC-A6 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. The cross section of the PI225MC-A6 is shown in Figure 1 and the block diagram in Figure 2. DOCUMENT SURFACE GLASS WINDOW LIGHT PATH MODULE HOUSE ROD LENS D LE R BA SENSORS PCB INSIDE PICTORIAL OF MODULE Figure 1. PI225MC-A6 Cross Section GLED LED LED LED LED LED LED LED LED VLED ROD LENS 830 PHOTO SENSORS 1 2 3 4 5 ---------------- 831 832 VIDEO LINE VN(-V) VDD (+5) SHIFT REGISTER GRD BUFFER VIDEO AMPLIFIER VOUT CP SP GRD Figure 2. PI225MC-A6 module block diagram PAGE 2 OF 6 - PI225MC-A6, 8/25/00 Table 1. 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 2. Absolute Maximum Rating: Parameter Symbols Power supply voltage Vdd Idd Vn In VLED ILED Input clock pulse (high level) Vih Input clock pulse (low level) Vil Table 3. Operating Environment Operating temperature Top Operating humidity Hop Storage temperature Tstg Storage humidity Hstg Maximum Rating 7.5 40 -15 15 5.5 500 Vdd - 0.5V -0.6 Units V ma V ma V ma V V 0 0 to 50 10 to 85 -25 to+75 5 to 95 C % 0 C % PAGE 3 OF 6 - PI225MC-A6, 8/25/00 Electro-Optical Characteristics (25 C) Table 4. Electro-optical characteristics at 25 C. Parameter Symbol Number of photo detectors Pixel to pixel spacing Line scanning rate Tint(1) Parameter 832 125 180 Units elements m sec Note Tested @ 5 MHz clock frequency Test at Tint=180ms Clock frequency(2) Bright output voltage(3) Bright output nonuniformity(4) Adjacent pixel nonuniformity(5) Dark nonuniformity(6) Dark output voltage Modulation transfer function(7) f Video Output Up Uadj Ud Vd MTF 5 1.0 <+/-30 <25 <20 <200 >50 MHz V % % mV mV % See note 7 for MTF & DOF. Definition: (1) Tint: Line scanning rate or integration time. Tint is determined by the interval of two SP, start pulses. The module was test at 180ms, but it will operate to 167ms with clocking speed of 5.0MHz. (2) f: main clock frequency. The module was tested at 5.0 MHz, but electrically it reliably operates above 5.0 MHz, but with a minimum integration time of 167 sec. (3) Vpavg = Vp(n)/832 (4) Up = [(Vpmax - Vp) / Vp] x 100% or [(Vp - Vpmin) / Vp] x 100% (5) Upadj = MAX[ | (Vp(n) - Vp(n+l) | / Vp(n)] x 100% Upadj is the nonuniformity percentage pixel to pixel (6) Ud = Vdmax - Vdmin Vdmin is the minimum output on a black document(O.D.=0.8) Vdmax: maximum output voltage of black document (O.D.= 0.8) (7) MTF = [(Vmax - Vmin) / (Vmax + Vmin)] x 100 [%]. DOF range is defined with the MTF. MTF is measure at glass surface and at 0.4mm from the glass > 50% and peaks at approximately mid-point of 0.2mm. Vmax: maximum output voltage at 50 lp/inch (At 1/2 of the optical Nyquest Frequency) Vmin: minimum output voltage at 50 lp/inch (8) O.D. = Optical Density (9) lp / inch: line pair per inch PAGE 4 OF 6 - PI225MC-A6, 8/25/00 Table 5. Recommended Operating Conditions (25 C) Item Power Supply Symbol Vdd Vn. VLED Idd In ILED Vih Vil f Min 4.5 -4.5 Mean(1) 5.0 -5 5 30 6 300 Vdd-.5 Max 5.5 -12 5.5 40 15 450 Vdd 0.6 5.0(2) Units V V V ma ma ma V V MHz % ns ms 0 C 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 Vdd-1.0 0 25 50 0.167 Tint(3) Top 25 5.0 50 (1) Tested at 5.0MHz and 180ms. (2) Also used as test frequency. (3)Tint (Min) is the lowest line integration time available at 5.0 MHz clock rate. Switching Characteristics (25C) to CP tprh tdh SP tds Vout tsh tw tdl MODULE TIMING DIAGRAM Figure 3. Clock and Start Pulse Timing Diagram The switching characteristics for the I/O clocks are shown in Figure 3. Its corresponding definition for the timing symbols are given in Table 5, below. PAGE 5 OF 6 - PI225MC-A6, 8/25/00 Table 5. Symbol Definition for the Above Timing Diagram Item Clock cycle time Clock pulse width Clock duty cycle Prohibit crossing time of Start Pulse Data setup time Data hold time Signal delay time Signal settling time Symbol to tw tprh tds tdh tdl tsh Min. 0.2 50 25 15 20 20 50 120 Typical Max. 4.0 75 Units s ns % ns ns ns ns ns PI225MC-A6 Module and Its Mechanical Dimensions The sketch of this module is to provide a pictorial of the module size and structure. A detailed drawing is available upon request. 19 pin 12 m 0m 1 .5m m 14 .0m m PC B in 0 p 3-E x 1 25L mm S1 25 10P1. -ZE1 JA ac e RE AD LIN E s gla ss urf 6.0 mm Pictorial of the Plastic Standard A6 Housing Size (c)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 6 OF 6 - PI225MC-A6, 8/25/00 |
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