Reflective Color Sensor Assembly OPB780Z Features: • • • • • • High-resolution conversion of light intensity to frequency Selectable color output frequency Communicates directly with a microcontroller Sensor power supply operation (2.7 V to 5.5 V) LED power separate input Includes LED, Sensor and interface cable Description: The OPB780Z color sensor uses a light-to-frequency converter that combines 64 configurable silicon photodiodes (on a 144 um center and measuring 120 um x 120 um each), with a white LED in a small, lightweight package that makes it ideal for using in miniature applications. The output is a square wave (50% duty cycle) with a frequency directly proportional to reflected light intensity (irradiance). The light-to-frequency converter reads an 8 x 8 array of photodiodes that consists of four groups of 16 photodiodes each, segregated by color: 16 photodiodes with red filters, 16 photodiodes with green filters, 16 photodiodes with blue filters and 16 clear photodiodes with no filters. Each color’s group of 16 photodiodes is interdigitated to minimize the effect of non-uniformity of the incident irradiance. Each color’s group is also connected in parallel. The type of photodiode used during operation is pin-selectable. The output of the device is designed to drive a standard TTL or CMOS logic input over short distances. The internal photodiode used by the device is controlled by two logic inputs, S2 and S3. See page 4 for more information. A 10 “ [25.4 cm] Flat Flexible Cable (FFC) is included for easy hook-up. The FFC is designed to interface with an AVX (ELCO) part number 04 6249 0080 00 800 connector. For more information, contact your local representative or OPTEK. Applications: • • • • • Block Diagram Photographic equipment Colormetry Chemical analyzers Display contrast controls High resolution digital measurement of light intensity Light Current-to-Frequency Out Converter Photodiode Array S2 S3 6 4 3 Ordering Information RoHS OPB780Z OPB780 with 10” Long Flat Flex Cable KA3128 10” Long Flat Flex Cable OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Issue A.5 6/09 Page 1 of 6 Reflective Color Sensor Assembly OPB780Z Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted) Operating Temperature TOPR = -30° C to +85° C Storage Temperature TSTG = -30° C to +85° C LED—Absolute Maximum Ratings1, 2 (TA = 25° C unless otherwise noted) Reverse Voltage VR = 5 V Forward Current IF = 30 mA PD = 120 mW Power Dissipation Peak Forward Current IFP = 100 mA Sensor—Absolute Maximum Ratings1, 2 (over operating free-air temperature range unless otherwise noted) Supply Voltage(VDD) 6V Input Voltage (all inputs, VI) -0.3 V to VDD + 0.3 V Notes: (1) Stresses beyond those linked under “absolute maximum rating” may cause permanent damage to device. These are only stress ratings, and functional operating of the device at these (or any other) conditions beyond those indicated in the Recommended Operating Conditions table shown above may affect the device’s reliability. (2) All voltage values are with respect to GND. 7,8 SO S3 6 S1 S2 4 OE Out 3 Gnd VDD 1,2 Cap (0.1µf) 5 LED DO NOT LOOK DIRECTLY AT LED WITH UNSHIELDED EYES OR DAMAGE TO RETINA MAY OCCUR. Pin Name Pin # Description VDD 1, 2 Supply voltage OUT 3 Output Frequency (FO) S2 4 Photodiode type selection input LED Anode 5 LED input S3 6 Photodiode type selection input GND 7, 8 Power supply ground OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. Issue A.5 6/09 Page 2 of 6 OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Reflective Color Sensor Assembly OPB780Z LED Electro-Optical Characteristics of LED1 (TA = 25°C unless otherwise noted) (See OVLAW4CB7 for more info.) PARAMETER MIN TYP MAX UNITS Luminous Intensity - 1.0 - cd IF = 20 mA VF Forward Voltage 2.8 3.4 3.9 V IF = 5 mA IR Reverse Current - - 10 µA VR = 5 V SYMBOL IV (1) TEST CONDITIONS Sensor Recommended Operating Conditions1 SYMBOL PARAMETER MIN TYP MAX UNITS RECOMMENDED CONDITIONS - VDD Supply Voltage 2.7 5 5.5 V VIH High-Level Input Voltage 2.0 - VDD V VDD = 2.7 V to 5.5 V VIL Low-Level Input Voltage 0.0 - 0.8 V VDD = 2.7 V to 5.5 V TA Operating Free-Air Temperature Range -40 - +70 °C - Sensor Electrical Characteristics1 (TA = 25° C, VDD = 5 V unless otherwise noted) SYMBOL VOH VOL PARAMETER High-Level Output Voltage 3 Low-Level Output Voltage 3 MIN TYP MAX UNITS TEST CONDITIONS - 4.5 - V IOH = -4 mA - 0.25 - V IOL = 4 mA IIH High-Level Input Current - - 5 µA - IIL Low-Level Input Current - - 5 µA - IDD Supply Current - 2 3 mA - 600 - kHz 2 - Full-Scale Frequency - Temperature Coefficient of Output Frequency - ±200 - ppm/°C Typical Temperature Rise Time Typical Temperature Fall Time - 100 - µ sec. tr, tf Power on λ ≤ 700 nm, -25° C ≤ TA ≤ 70° C / ± 200 ppm/° C - Notes: (1) All voltage values are with respect to GND. (2) Full-scale frequency is the maximum operating frequency of the device without saturation. (3) Output interface of device is designed to drive a standard TTL or CMOS logic input over short distances. If lines greater than 12 inches are used on output, a buffer or line driver is recommended. OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Issue A.5 6/09 Page 3 of 6 Reflective Color Sensor Assembly OPB780Z Output Frequency Characteristics1 (VDD = 5 V, TA = 25 °C, IF = 5mA) Target / Surface Minimum Maximum Units OPB780Z Sensor Typical Electro-Optical Characteristics Curves Red Filter Selected (S2=L/S3=L) Red 23 41 Green 7 15 Spectral Response Photodiode Spectral Responsivity kHz Blue 3 7 White - 1.5 Green Filter Selected (S2=H/S3=H) Red 6 15 Green 6 37 Blue 5 13 White - 1.5 kHz Relative Responsivity 1.0 No rmalized to Clear @ 680 nm 0.9 0.8 0.7 TA = 25° C 0.6 0.5 0.4 0.3 0.2 0.1 0.0 300 500 700 900 1100 λp Wavelength (nm) Blue Filter Selected (S2=L/S3=H) 4 23 Green 13 21 Blue 21 36 White - 1.5 kHz Clear Filter Selected (S2=H/S3=L) Red 38 71 Green 46 85 Blue 31 60 White - 5 kHz Spectral Response with >700nm Cut-Off Filter (not included) Relative Responsivity Red 1.0 0.9 No rmalized to Clear @ 530 nm 0.8 0.7 TA = 25° C 0.6 0.5 0.4 0.3 0.2 0.1 0.0 300 500 700 900 1100 λp Wavelength (nm) Notes: (1) IF = 5 mA, D = 0.225 inch, (2) All voltage values are with respect to GND. OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. Issue A.5 6/09 Page 4 of 6 OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Reflective Color Sensor Assembly OPB780Z OPB780Z Sensor & LED - Typical Electro-Optical Characteristics Curves Forward Current vs Chromaticity Coordinate Sensor Radiation Diagram 0° 10° 20° 0.35 30° TA = 25° TA = 25° C 0.34 1 mA 40° 0.33 0.9 50° 0.8 60° 0.32 70° 0.7 90° 0.3 0.1 0.2 0.4 20 mA 50 mA 0.31 80° 0.5 5 mA Y 1.0 0.30 0.29 0.6 100 mA 0.30 0.31 0.32 0.33 0.34 X Ambient Temperature vs Chromaticity Coordinate LEDSpectrum Spectrum 0.35 TA = 25° C IF = 20 mA 1.0 IFP = 20 mA 0.34 0.8 -30° C 0.33 0.6 0° C Y Relative Emission Intensity (a.u.) 1.2 0.4 0.32 50° C 0.2 0.0 350 25° C 0.31 450 550 650 Wavelength λp (nm ) 750 0.30 0.29 85° C 0.30 0.31 0.32 0.33 0.34 X Relative Luminosity (a.u.) LED Directivity TA = 25° C IF = 20 mA Radiation Angle OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Issue A.5 6/09 Page 5 of 6 Reflective Color Sensor Assembly OPB780Z OPB780Z LED - Typical Electro-Optical Characteristics Curves Forward Current vs Relative Luminousity Forward Voltage vs Forward Current Relative Lum inousity (a.u.) Forward Current IFP (mA) 1000 TA = 25o C 100 10 1 2.5 3.0 3.5 4.0 4.5 4.0 3.5 TA = 25o C 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 5.0 Forward Voltage VF (V) 60 80 100 120 Ambient Temperature vs Forward Voltage 1000 5.4 TA = 25 C o Forward Voltage VF (V) Allowable Forward Current IFP (mA) 40 Forward Current IFP (mA) Duty Ratio vs Allowable Forward Current 100 1 10 IFP = 60 mA IFP = 20 mA IFP = 5 mA 5.0 4.6 4.2 3.8 3.4 3.0 2.6 -40 -20 10 100 Ambient Temperature vs Relative Luminosity 20 40 60 80 100 Ambient Temperature vs Allowable Forward Current 10.0 40 Allowable Forward Current IF (mA) IFP = 20 mA 1.0 0.1 -40 0 Ambient Temperature TA (oC) Duty Ratio (%) Relative Luminosity (a.u.) 20 -20 0 20 40 60 80 Ambient Temperature TA (°C) 100 30 20 10 0 0 20 40 60 80 100 Am bient Tem perature TA (oC) OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. Issue A.5 6/09 Page 6 of 6 OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com