NOM02A6-AR77G 200/100DPI Ultra High-Speed Contact Image Sensor Module Description http://onsemi.com 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 μsec/line. The NOM02A6−AR77G module employs proprietary CMOS image sensing technology from ON Semiconductor to achieve high−speed performance and high sensitivity. IMAGE SENSOR MODULE A4 CASE MODBJ Features Contact Image Sensor Module Analog to Digital Converters DSP LED Drivers Parallel Port Tranceiver Paper Insertion Sensing Switch Scan System Timing and Control Motor Motor Controller and Driver = Year = Month = Serial Number = Pb−Free Package GND SP GND CLK ILED GLED1 GLED2 GLED3 CONNECTOR PIN ASSIGNMENT RS • Gaming Machines and Lottery Tickets • Mark Readers Including Balloting and Test Scoring • Office Automation Equipment YY MM SSSSSS G VDD Applications MARKING DIAGRAM GND 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 μsec/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 VOUT • • • • • • • • • • • • 1 2 3 4 5 6 7 8 9 10 11 12 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. Figure 1. Typical Scanner Application © Semiconductor Components Industries, LLC, 2013 December, 2013 − Rev. 1 1 Publication Order Number: NOM02A6−AR77G/D NOM02A6−AR77G Table 1. ORDERING INFORMATION Part Number NOM02A6−AR77G ILED Package Shipping Configuration (Pb−Free) 160 per packing carton RED Light Guide GLED1 GLED2 Rod Lense GLED3 Photo Sensor Array VDD (+3.3V) 1 2 3 4 812 GND Amp SP Buf CLK Buf RS Resolution Selection Shift Register Pixel 1 corresponds to the connector end of the module 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 5 GND 6 SP 7 GND Ground 8 CLK Clock input Common anodes for all red LEDs Resolution select control, hold high (VDD) for 200 dpi, hold low (Ground) for 100 dpl Ground Shift register start pulse 9 ILED 10 GLED1 Cathode RED LED 1 11 GLED2 Cathode RED LED 2 12 GLED3 Cathode RED LED 3 http://onsemi.com 2 VOUT NOM02A6−AR77G Table 3. ABSOLUTE MAXIMUM RATINGS Symbol Value Unit Power supply voltage Parameter VDD 4 V Power supply current IDD 17.4 mA ILED 75 mA Vin −0.2 to VDD + 0.2 V TSTG −25 to 75 °C HSTG 10 to 90 % ESDHBM ±2 kV Input voltage range for SP, CLK, RS Storage Temperature Storage Humidity, Non−Condensing ESD Capability, Contact Discharge (Note1) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect 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 TA = 25°C) (Note 2) Parameter Symbol Min Typ Max Unit Power supply voltage (Note 3) VDD 3.1 3.3 3.5 V Power supply current IDD 14.5 ILED Reference voltage (Note 4) VREF Low level input voltage for SP, CLK, RS VIL High level input voltage for SP, CLK, RS VIH Line scanning rate (Note 5) Tint 1.10 2.8 mA 60 mA 1.30 V 0.6 V VDD VDD + 0.2 V 0.163 2.0 ms 1.20 Clock frequency (Note 6) f 0.5 5.5 6.0 MHz Clock period to 166.7 182 2000 ns Clock pulse width (Note 7) tw 83.35 91 1000 ns Clock pulse high duty cycle DCCP 40 50 60 % Data setup time tsu 20 ns Data hold time th 25 ns Clock rise time tr_CLK 83.35 250 ns Clock fall time tf_CLK 83.35 250 ns Start pulse rise time tr_SP 83.35 250 ns Start pulse fall time tf_SP 83.35 250 ns 2. 3. 4. 5. 6. 7. Pixel rise time Prt 110 ns Operating Temperature Top 0 50 °C Operating Humidity, Non−Condensing Hop 10 60 % Refer to Figures 4, 5 and 6 for more information on AC characteristics VDD directly affects illumination intensity, which directly affects VOUT. VREF is fixed internally to control the dark video output bias level Tint is the line scanning rate or integration time. Tint is determined by the interval between two start pulses. Main clock frequency (f) corresponds to the video sampling frequency. Min, Typ, Max specifications reflect operation at the corresponding Min, Typ, Max clock frequency. http://onsemi.com 3 NOM02A6−AR77G Table 5. PHYSICAL SPECIFICATIONS Symbol Typ Unit Scan width Parameter PDw 103 mm Number of Photo Detector Arrays PDAn 7 arrays PDn_200 812 elements PDn_100 406 elements Number of Photo Detectors Table 6. PHYSICAL CHARACTERISTICS Parameter Symbol Pixel pitch Min PDsp Typ Max 126.9 Unit mm Inter−array spacing PDAsp 150 180 210 mm Inter−array vertical alignment PDAvxp −40 0 40 mm Red LED peak wavelength lp 640 nm Table 7. ELECTRO−OPTICAL CHARACTERISTICS TEST CONDITIONS Symbol Value Unit Power supply voltage Parameter VDD 3.3 V Power supply current ILED 60 mA f 5.5 MHz DCCP 50 % Line scanning rate Tint 163 ms Operating Temperature Top 25 °C Clock frequency Clock pulse high duty cycle http://onsemi.com 4 NOM02A6−AR77G Table 8. ELECTRO−OPTICAL CHARACTERISTICS (Unless otherwise specified, these specifications were achieved with the test conditions defined in Table 7) Symbol Min Typ Max Unit Bright analog output voltage (Note 8) Vpavg 2.4 2.5 2.6 V Bright output non−uniformity (Note 9) Up −35 +35 % Parameter Bright output non−uniformity total (Note 10) Uptotal 70 % Adjacent pixel non−uniformity (Note 11) Upadj 35 % Dark output voltage (Note 12) Vd Dark non−uniformity (Note 13) Ud VOUT dark subtracted (Note 14) Vds Individual pixel noise (rms) (Note 15) Image lag (Note 16) 1.1 1.3 V 200 mV 1.4 V Np 10 mV IL 1 % 1.2 1.2 1.3 Modulation transfer function at 50 line pairs per in (lp/in) (Note 17) MTF50 40 % Modulation transfer function at 100 line pairs per in (lp/in) (Notes 17 and 18) MTF100 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. SP CLK 200dpi CLK # 100dpi CLK # 1 1 2 2 3 3 80 80 81 81 82 82 83 83 84 84 85 85 886 887 888 889 890 891 892 893 894 480 481 482 483 484 485 486 487 488 1 1 2 2 3 3 804 805 806 807 808 809 810 811 812 398 399 400 401 402 403 404 405 406 VOUT 200dpi pixel # 100dpi pixel # Number of pixels (clocks) per readout section 200dpi 100dpi 82 Inactive Pixels (82 Clocks) 82 Inactive Pixels (82 Clocks) 812Active Pixels(894Clocks) 406Active Pixels(488Clocks) Figure 3. Overall Timing Diagram for 200/100 dpi Modes http://onsemi.com 5 NOM02A6−AR77G to tw tw 50% CLK 10% th 90% tr_CLK tf_CLK tsu SP TS tr_SP tf_SP VOUT1 80% Prt Figure 4. Rise and Fall Timing for 200/100 dpi Modes 1 CLK th 2 3 82 83 84 85 tsu ÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎt ÎÎÎ SP th su 1 VOUT1 2 3 Figure 5. Timing of SP to First Pixel Sensor for 200/100dpi Modes CLK 50% 50% TS VOUT1 V pavg 80% Vd GND P rt 1 Pixel Figure 6. Pixel Timing for 200/100 dpi Modes http://onsemi.com 6 NOM02A6−AR77G DESCRIPTION OF OPERATION • For 100 dpi, the RS input is held low (Vss) 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 83rd 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. Light Rays 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 times are listed in Table 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. Document Light Guide 1 Rod Lens Glass 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. Die Circuit Board Connector Scanner Applications Figure 7. Module Cross Section View 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. 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) http://onsemi.com 7 NOM02A6−AR77G 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. Initialization Document Detected? no Start Scan RS = 1 SP = 1 for 1 Clock , 81 Clock , CTR = 0 Clock Pulse Read Pixel into Memory CTR++ == 894 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. no Transfer Scan Line Data Document Detected? yes Glass Lens Care Precautions should be taken to avoid scratching or touching the glass lens. The glass lens may be cleaned with alcohol. Done Figure 8. Typical Scanner Algorithm http://onsemi.com 8 NOM02A6−AR77G Figure 9. Typical Scanner Assembly http://onsemi.com 9 NOM02A6−AR77G PACKAGE DIMENSIONS IMAGE SENSOR MODULE CASE MODBJ ISSUE O http://onsemi.com 10 NOM02A6−AR77G 380 mm PACKING DIMENSIONS 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 Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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