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? semiconductor components industries, llc, 2013 december, 2013 ? rev. 1 1 publication order number: nom02a6 ? ar77g/d NOM02A6-AR77G 200/100dpi ultra high-speed contact image sensor module description the nom02a6 ? ar77g contact image sensor (cis) module integrates a red led light source, lens and image sensor in a compact housing. the module is designed for gaming, lottery tickets, mark reading and office automation equipment applications and is suitable for scanning documents up to 103 mm wide. the analog video output achieves an ultra high ? speed scanning rate of 163 sec/line. the nom02a6 ? ar77g module employs pr oprietary cmos image sensing technology from on semiconductor to achieve high ? speed performance and high sensitivity. features ? light sources, lens and sensor are integrated into a single module ? 103 mm scanning width at 7.9/15.8 dots per mm resolution ? 163 sec/line scanning speed for 200 dpi @ 5.5 mhz pixel rate ? integrated amplifier with analog video output ? supports a6 paper size at up to 318 pages per minute ? red led illumination light guide ? wide dynamic range ? compact 124.0 mm x 21.0 mm x 12.0 mm module housing ? single 3.3 v module power supply ? low power ? light weight 1.1 oz packaging ? these devices are pb ? free, halogen free/bfr free and are rohs compliant applications ? gaming machines and lottery tickets ? mark readers including balloting and test scoring ? office automation equipment contact image sensor module analog to digital converters dsp led drivers parallel port tranceiver paper insertion sensing switch scan system timing and control motor controller and driver motor figure 1. typical scanner application http://onsemi.com image sensor module a4 case modbj marking diagram yy = year mm = month ssssss = serial number g = pb ? free package connector pin assignment see detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ordering information 1 2 3 4 5 6 7 8 9 10 11 12 vout gnd vdd rs gnd sp gnd clk iled gled1 gled2 gled3
nom02a6 ? ar77g http://onsemi.com 2 table 1. ordering information part number package shipping configuration nom02a6 ? ar77g (pb ? free) 160 per packing carton 1 2 3 4 shift register amp buf buf photo sensor array red light guide rod lense vout sp clk rs gnd vdd (+3.3v) gled1 iled 812 resolution selection pixel 1 corresponds to the connector end of the module gled2 gled3 figure 2. simplified block diagram table 2. pin function description pin pin name description 1 vout analog video output 2 gnd ground 3 vdd power supply (+3.3 v) 4 rs resolution select control, hold high (vdd) for 200 dpi, hold low (ground) for 100 dpl 5 gnd ground 6 sp shift register start pulse 7 gnd ground 8 clk clock input 9 iled common anodes for all red leds 10 gled1 cathode red led 1 11 gled2 cathode red led 2 12 gled3 cathode red led 3
nom02a6 ? ar77g http://onsemi.com 3 table 3. absolute maximum ratings parameter symbol value unit power supply voltage v dd 4 v power supply current i dd 17.4 ma i led 75 ma input voltage range for sp, clk, rs v in ? 0.2 to v dd + 0.2 v storage temperature t stg ? 25 to 75 c storage humidity, non ? condensing h stg 10 to 90 % esd capability, contact discharge (note1) esd hbm 2 kv stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. this module assembly has been esd tested to iec61000 ? 4 ? 2 (hbm) contact discharge table 4. recommended operating ranges (unless otherwise specified, these specifications apply t a = 25 c) (note 2) parameter symbol min typ max unit power supply voltage (note 3) v dd 3.1 3.3 3.5 v power supply current i dd 14.5 ma i led 60 ma reference voltage (note 4) v ref 1.10 1.20 1.30 v low level input voltage for sp, clk, rs v il 0.6 v high level input voltage for sp, clk, rs v ih 2.8 vdd vdd + 0.2 v line scanning rate (note 5) t int 0.163 2.0 ms clock frequency (note 6) f 0.5 5.5 6.0 mhz clock period t o 166.7 182 2000 ns clock pulse width (note 7) t w 83.35 91 1000 ns clock pulse high duty cycle dc cp 40 50 60 % data setup time t su 20 ns data hold time t h 25 ns clock rise time t r_clk 83.35 250 ns clock fall time t f_clk 83.35 250 ns start pulse rise time t r_sp 83.35 250 ns start pulse fall time t f_sp 83.35 250 ns pixel rise time p rt 110 ns operating temperature t op 0 50 c operating humidity, non ? condensing h op 10 60 % 2. refer to figures 4, 5 and 6 for more information on ac characteristics 3. vdd directly affects illumination intensity, which directly affects vout. 4. vref is fixed internally to control the dark video output bias level 5. tint is the line scanning rate or integration time. tint is determined by the interval between two start pulses. 6. main clock frequency (f) corresponds to the video sampling frequency. 7. min, typ, max specifications reflect operation at the corresponding min, typ, max clock frequency.
nom02a6 ? ar77g http://onsemi.com 4 table 5. physical specifications parameter symbol typ unit scan width pd w 103 mm number of photo detector arrays pda n 7 arrays number of photo detectors pd n_200 812 elements pd n_100 406 elements table 6. physical characteristics parameter symbol min typ max unit pixel pitch pd sp 126.9 m inter ? array spacing pda sp 150 180 210 m inter ? array vertical alignment pda vxp ? 40 0 40 m red led peak wavelength p 640 nm table 7. electro ? optical characteristics test conditions parameter symbol value unit power supply voltage vdd 3.3 v power supply current i led 60 ma clock frequency f 5.5 mhz clock pulse high duty cycle dc cp 50 % line scanning rate t int 163 s operating temperature t op 25 c
nom02a6 ? ar77g http://onsemi.com 5 table 8. electro ? optical characteristics (unless otherwise specified, these specifications were achieved with the test conditions defined in table 7) parameter symbol min typ max unit bright analog output voltage (note 8) v pavg 2.4 2.5 2.6 v bright output non ? uniformity (note 9) u p ? 35 +35 % bright output non ? uniformity total (note 10) u ptotal 70 % adjacent pixel non ? uniformity (note 11) u padj 35 % dark output voltage (note 12) v d 1.1 1.2 1.3 v dark non ? uniformity (note 13) u d 200 mv vout dark subtracted (note 14) v ds 1.2 1.3 1.4 v individual pixel noise (rms) (note 15) n p 10 mv image lag (note 16) il 1 % modulation transfer function at 50 line pairs per in (lp/in) (note 17) mtf 50 40 % modulation transfer function at 100 line pairs per in (lp/in) (notes 17 and 18) mtf 100 20 % 8. vpavg = vp(n)/812 for 200dpi, where vp is the pixel amplitude value of vout in volts for a bright signal defined as a white document with leds turned on, n is the sequential pixel number in one scan line. 9. up = max [(vpmax ? vpavg) / vpavg x 100%], [(vpavg ? vpmin) / vpavg x 100%] 10. uptotal = [(vpmax ? vpmin)/vpavg] x 100%, 11. upadj = max [|(vp(n) ? vp(n+1) | / vp(n)] x 100%, where upadj is the nonuniformity in percent between adjacent pixels for a bright background 12. vd is the pixel amplitude value of vout in volts for a dark signal defined as a black document with leds turned off 13. ud = vdmax ? vdmin, where vdmax is the maximum pixel voltage of any dark pixel with the leds turned off vdmin is the minimum pixel voltage of any dark pixel with the leds turned off 14. vds = vpavg ? vd, where vpavg is the average pixel level in the light vd is the average pixel level in the dark. it should be adjusted to approximately 1.3 v by adjusting the led intensity, unless stated otherwise. 15. dark noise voltage is defined as the average of the standard deviation of each pixel at 200 scan lines in the dark 16. image lag is defined as taking two subsequent line scans where the first readout occurs when the sensor is illuminated such that the imager output voltage is in saturation and the second readout occurs with zero irradiance falling on the sensor. for information only. 17. mtf = [(vmax ? vmin)/(vmax + vmin)] x 100%, where vmax is the maximum output voltage at the specified line pairs per inch (lp/in) vmin is the minimum output voltage at the specified lp/in 18. for information only. 2 3 80 81 82 83 84 85 886 887 888 889 891 892 893 894 200dpi clk # 2 3 80 81 82 83 84 85 480 481 482 483 485 486 487 488 100dpi clk # 1 2 804 805 806 807 809 810 811 812 200dpi pixel # 398 399 400 401 403 404 405 406 100dpi pixel # 1 2 200dpi 100dpi 82 inactive pixels (82 clocks) 82 inactive pixels (82 clocks) 812active pixels (894clocks) 406active pixels (488clocks) sp clk vout number of pixels (clocks) per readout section 3 3 1 1 890 484 808 402 figure 3. overall timing diagram for 200/100 dpi modes
nom02a6 ? ar77g http://onsemi.com 6 t o t w t w t h t su t r_sp t f_sp t r_clk t f_clk 50% sp clk vout1 p rt ts 80% 10% 90% figure 4. rise and fall timing for 200/100 dpi modes ??? ??? ??? ??? ??? ??? t h t h t su t su 1 2 3 82838485 123 sp clk vout1 ??? ??? ??? ??? ??? ??? figure 5. timing of sp to first pixel sensor for 200/100dpi modes 50% p rt ts 1 pixel 50% 80% clk vout1 v d v pavg gnd figure 6. pixel timing for 200/100 dpi modes
nom02a6 ? ar77g http://onsemi.com 7 description of operation functional description the nom02a6 ? ar77g module consists of seven contact image sensors, each with 116 pixel elements arranged for 200 dpi operation or 58 pixel elements arranged for 100 dpi operation. the sensors are cascaded to provide 812 or 406 photo ? detectors with their associated multiplex switches and a double ? buffered digital shift register that control its sequential readout. a buffer amplifier amplifies the video pixels from the image sensors and outputs an analog video signal from the module as shown in figure 2. in operation, the sensors produce analog image pixel signals (or video signals) proportional to the exposure on the corresponding picture elements on the document. the vout signal outputs 812 or 406 pixels for each scan line. as will be explained in more detail, 82 clock cycles are required to initialize a line scan. the first valid pixel is shifted out from vout on the 83 rd clock cycle during each scan represents the first pixel on the other end of the module from the connector. a pictorial of the nom02a6 ? ar77g cross section view is shown in figure 7. mounted in the module is a one ? to ? one graded ? index micro lens array that focuses the scanned document image onto the sensing plane. illumination is accomplished by means of integrated red led light guide source. all components are housed in a small plastic housing, which has a glass cover. the top surface of the glass acts as the focal point for the object being scanned and protects the imaging array, micro lens assembly and led light guide source from dust. rod lens circuit board die light guide 1 glass document light rays connector figure 7. module cross section view power saving mode the nom02a6 ? ar77g incorporates an internal power ? saving feature. when a particular sensor is selected for read out, the sensor powers up the output amplifier and then powers it down when the read scan is completed. selective resolutions the resolution select input (rs) is used to select between 200 and 100 dpi modes. ? for 200 dpi, the rs input is held high (vdd) ? for 100 dpi, the rs input is held low (vss) in 200 dpi mode, all 812 pixels are clocked out. in the 100 dpi mode, pixels 1 and 2 are combined, 3 and 4 are combined and so on up to pixels 811 and 812 being combined. this will give a net pixel count of 406 pixels. in the 100 dpi mode, one half of the pixel amplifiers and one half of the scanning register are disabled when compared to the 200 dpi mode. as a result, sensitivity in the 100 dpi mode will be twice that of the 200 dpi mode. the dpi readout time will be approximately half of the 200 dpi readout time. unlike a ccd array, the 200 dpi and 100 dpi modes all operate at the same clock frequency. module timing considerations figure 3 shows the initialization of the module for the 200 dpi and 100 dpi modes. the scan line starts when sp is captured on the falling edge of the clock input (clk). during the first 82 clock cycles following the sp pulse, all image sensor pixels cycle through their pre ? scan initialization process that reduces fpn and reset noise. hence the module will clock out 82 inactive pixels before its first active pixel is clocked out. figure 4 and 5 detail the timing of the clk, sp and vout signals in further detail, they have the same timing requirements for the 200 and 100 dpi modes. the rise and fall t imes are listed in t able 5. in figure 5, note that clock 83 is the first active pixel, as the first 82 clocks produce dummy pixels (the output of the first 82 clocks should not be used for any purpose such as black level clamping). the analog vout signals are internally sampled on the rising edge of clock and latched by hold circuits on the falling edge of clock. the application should sample the vout signals when the signals are stable between the falling and rising edge of clock as shown in figure 6. connector pin out description connections to the module are via a 3.5 x 16.75 mm 12 ? pin connector (bison advanced technology part number 98441 ? 12123) located at one end of the module as shown in the package drawing on page 10. the location of pin number 1 is indicated on the package drawing. scanner applications a typical use of the nom02a6 ? ar77g module in scanner applications is shown in figure 9. the document to be digitized is fed into the scanner where a sensor detects its presence. the scanner then operates the motor to move the paper under the contact image sensor module. the module illuminates the paper with internal leds and the image sensor pixel array detects the amount of reflected light and simultaneously measures a full line of pixels which are sampled and transferred to a fifo for storage and conversion to a parallel output format. once the pixel line is processed, the motor advances the paper and the next scan line is captured.
nom02a6 ? ar77g http://onsemi.com 8 initialization document detected? start scan rs = 1 sp = 1 for 1 clock , 81 clock , ctr = 0 clock pulse read pixel into memory ctr++ == 894 transfer scan line data document detected? done no no yes figure 8. typical scanner algorithm figure 8 outlines the basic steps in the scanner control sequence. first the circuits are initialized and the scanner waits for a document to be detected, usually by a paper sensing switch. then a global start pulse and series of clock pulses are supplied to capture a line image. after the appropriate number of clock pulses the first pixel value appears on the output. the pixel can be stored in a local line buffer memory. subsequent clocks cause the remaining pixels to be shifted out and stored in the line buffer. once the complete line has been shifted out it can be transferred to the host application and the system advances the paper and the line scan process repeats until the paper sensing switch indicates the document has passed completely through the scanner. device marking and barcode description each module is marked with a tag that contains the part number, a number combining the manufacturing date code and serial number and a barcode. the barcode presents the date code and serial number in interleave 2 of 5 barcode format as follows yymmssssss where yy is the year, mm is the month, and ssssss is the serial number. glass lens care precautions should be taken to avoid scratching or touching the glass lens. the glass lens may be cleaned with alcohol.
nom02a6 ? ar77g http://onsemi.com 9 figure 9. typical scanner assembly
nom02a6 ? ar77g http://onsemi.com 10 package dimensions image sensor module case modbj issue o
nom02a6 ? ar77g http://onsemi.com 11 packing dimensions 380 mm no. name material 1 shockproof pad epe 2 packing tray polyfoam 3 conduct electricity sheet pe + conductive sheet 4 waterproof bag pe 5 packing box ? carton kraft paper on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a list ing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. all operating parame ters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the right s of others. scillc products are not designed, intended, or a uthorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unin tended or unauthorized use, even if such claim alleges that scil lc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyrig ht laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 nom02a6 ? ar77g/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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