™ Peripheral Imaging Corporation PI411MC-A7 400DPI CIS Module Engineering Data Sheet Key Features • Low power-Single Power Supply at 5.0Volts • Light source, lens, and sensor are integrated into a single module • 15.7 dpm resolution, 89 mm scanning length • High Speed Page Scan - up to 282 msec/line @ 5MHz pixel rate • Wide dynamic range • Analog output • 660 nm LED light source • Compact size @ 13 mm x 25.6 mm x 102 mm • Light weight General Description The PI411MC-A7 is a contact imaging sensor, CIS, module that can operate from a single 5.0 Volts supply. It is a linear scanning array composed of 11 PI3022 imaging sensor chips. The PI3022 is a 400 DPI solid-state line imaging sensor chip with 128 photo sensitive elements, also, a product of Peripheral Imaging Corporation. Eleven of these devices are sequentially cascaded to form the linear scanning array with a total photo sensing elements of 1408. This imaging device is fabricated using MOS imaging sensor technology for its high-speed performance and high sensitivity. It is designed for scanning A7 size (89 mm) documents with 400 dots per inch resolution. Applications include ticket, check and card scanners, variety of mark readers, and other automation equipment. PAGE 1 OF 7 - PI411MC-A7, 08-06-02 Functional Description The PI411MC-A7 consists of 11 imaging array sensors that are cascaded to provide 1408 photo-detectors. Each sensor has their associated multiplex switches, and a digital shift register that controls its sequential readout. Each also contains a chip select switch so that each following chip is accessed sequentially as its predecessor chip completes its scan. Theses chips are mounted on a PCB board along with clock buffers and video signal amplifier. See Figure 1. PI411MC-A7 module block diagram. GLED LED LED LED LED LED LED LED LED VLED ROD LENSE 1406 1407 1408 PHOTO SENSORS 1 2 3 4 VIDEO LINE VDD(+5) GRD SHIFT REGISTER BUFFER CP SP VIDEO AMPL VOUT GRD Figure 1. PI411MC-A7 module block diagram. The PCB containing the imaging array is enclosed in a module housing, along with a oneto-one graded indexed micro lens array that focuses the scanned documents' image onto the sensing line of the sensor chips. The document is illuminated with a LED light source, which is also mounted in the housing. See Figure 2. PI411MC-A7 Cross Sectional View. GLASS WINDOW LIGHT PATH ROD LENS MODULE HOUSE DOCUMENT SURFACE D LE R BA SENSORS PCB INSIDE PICTORIAL OF MODULE Figure 2. PI411MC-A7 Cross Sectional View PAGE 2 OF 7 - PI411MC-A7, 06-06-02 This pictorial cross section shows the LED Bar light source and its Illumination path. The light on the document reflects images on the document. The reflected images focus through the micro lens onto the chips' image sensing line where images are converted to proportional electrical charges. An on board amplifier processes these signal charges into proportional video signal voltages, which is sent out to the output video port. All components are housed in a small plastic housing and covered with a glass window. This cover glass not only serves to protect all of the critical components within the housing from dust, but, along with micro lens, it determines the depth-of-focus because it lies in the optical path. Pin Out Description There is a connector located at the end of the module. The outline of the module of Figure 4 of the mechanical section illustrates the connector location. With the module window facing down on flat surface, with the viewer looking down on backside of the module, and with the connector's pins facing viewer, the connector is located on the right hand end of the module. The connector is a surface-mount-flex input, Molex 52207-0890, 1 mm single 10-pin row. Its I/O designation is provided in Table 1. I/O Designation. Pin number 1 location is the pin closest to end of the module. Pin Number 1 2 3 4 5 6 7 8 9 10 Symbol Vout Gnd Vdd (+5V) NA Gnd SP Gnd CP GLED VLED Names and Functions Analog Video Output Ground; 0V Positive power supply Not used Ground; 0V Shift register start pulse Ground; 0V Sampling clock pulse Ground for the light source Supply for the light source Table 1. I/O Designation PAGE 3 OF 7 - PI411MC-A7, 08-06-02 Absolute Maximum Rating: The following is a table of absolute maximum parameters. These parameters should not be used in prolonged operation. Parameter Symbols Maximum Rating Units Power Supply Vdd 7.0 V Idd 50 mA VLED 5.7 V ILED 300 mA Input Clock Pulse (high) Vih Vdd V Input Clock Pulse (low) Vil -0.5 V Table 2. Absolute Maximum Rating Operating Environment Operating temperature Operating humidity Storage temperature Storage humidity Top Hop Tstg Hstg 0 to 50 10 to 85 -25 to 85 5 to 95 0C % 0C % Table 3. Operating Environment Electro-Optical Characteristics (25° C) Parameter Symbol Number of photo detectors Pixel to pixel spacing Line scanning rate(1) Tint Parameter 1408 62 423 Units elements mm msec Clock frequency (2) Fclk 3.33 MHz Bright output voltage (3) Video Output 1.2 +/-0.05 V Bright output nonuniformity (4) Up <+/-30 % PAGE 4 OF 7 - PI411MC-A7, 08-06-02 Note @ 3.33 MHz clock frequency See note 2 for 5.0 MHz operation. Specified for Tint = 423msec. Adjacent pixel nonuniformity (5) Dark nonuniformity (6) Dark output voltage Modulation transfer function (7) Definition: Uadj <25 % Ud Vd MTF <75 200<Vd<300 >40 mV mV % See note 7 for MTF & DOF. Table 4. Electro-optical characteristics at 25° C. (1) Tint: Line scanning rate or integration time. Tint is determined by the interval of two SP, start pulses. See note 2 for the high scanning speed operation. (2) Fclk: main clock frequency. The call out is at 3.3 MHz, but electrically, the module reliably operates to 5.0 MHz. This modification will require adjusting the LED light level and gain adjust. (3) Vpavg = å Vp(n)/1804 (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 Vdmax: maximum output voltage of black document (7) MTF = [(Vmax - Vmin) / (Vmax + Vmin)] x 100 [%]. Depth of focus, DOF, range is defined with the MTF. MTF is measure at glass surface. Vmax: maximum output voltage at 100 lp/inch (At 1/2 of the optical Nyquest Frequency) Vmin: minimum output voltage at 100 lp/inch (8) lp / inch: line pair per inch Table 5. Recommended Operating Conditions (25 °C) Item Symbol Min Power Supply Vdd 4.5 VLED 4.5 Idd 28 ILED 130 Input voltage at digital high Vih Vdd-1.0 Input voltage at digital low Vil 0 Clock frequency Fclk Clock pulse high duty cycle 25 Clock pulse high duration (1) 50 (2) Integration time Tint 0.282 Operating temperature Top Mean 5.0 5.0 32 180 Vdd-0.5 3.33 Max 5.5 5.5 36 235 Vdd 0.6 5.0 25 5.0 50 Table 5. Recommended Operating Conditions (25 °C) PAGE 5 OF 7 - PI411MC-A7, 08-06-02 Units V V ma ma V V MHz % ns ms 0 C (1) The clock high duration are at 5.0 MHz maximum clock rate. (2) Tint (Min) is the minimum line integration time available at 5.0 MHz clock rate. See note 2 under Table 4. Switching Characteristics (25°C) to tw CP tprh tdh SP tdl tds Vout tsh 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 timing symbol definitions are given in Table 6, below. Item Clock cycle time Clock pulse width Clock duty cycle Prohibit crossing time of Start Pulse Data setup time Data hold time Signal fall delay time Signal sampling time Symbol to tw Min. tprh 0.2 50 25 15 tds tdh tdl tsh 20 20 50 120 Typical Max. 4.0 75 Table 6. Symbol Definition for the Above Timing Diagram PAGE 6 OF 7 - PI411MC-A7, 08-06-02 Units ms ns % ns ns ns ns ns 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. NOTE: All dimensions in mm. ma 25.6 xim um 12 ter tor .0 15 e cen nec n th co To the f o 10 2 10 um im x ma NS IO NS ERS E IM ET L D IM AL MILL IN TWO SETS OF MOUNTING HOLES ARE MIRRORE IMAGED ON BOTH ENDS HOLE=2X2 M2.6 TOP TIGHT SCREW USE 02.2 HOLE (DP: 6.0) C0.2 8.0 .7 1mm x 10 Flex cable connector 22 22.00 .0 24 .6 6.8 12.7 15.2 6.8 Readline 6.0 24.3 25.3 Figure 4. PI411MC-A7 Module Mechanical Outline ©2002 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 - PI411MC-A7, 08-06-02