AEDS-9300 Transmissive Photointerrupter Data Sheet Description Features The photointerrupter consists of a Gallium Arsenide infrared light emitting diode and a NPN silicon phototransistor built in a black plastic housing. It is a transmissive subminiature photointerrupter. • • • • • • Input VCC Output RL Figure 1: Illustrates Basic Configuration of Photointerrupter Non-Contact Sensing Infra-Red Wavelength Fast Switching Speed Mounting Guide Pins RoHS Compliant -25 °C to +85 °C Operating Temp. Applications • • • • • Optical Switch ATM Machines Vending Machines Edge, Position Detections Office Automation Equipments Theory of Operation The photo-interrupter consists of an Infrared light source and a photo-diode in a single Dual-in-Line package. The photo-interrupter could be mounted onto a PC board with a current-limiting resistor in series externally with the Infrared Emitting Diode. With this, such input voltage for the emitting diode could share the same voltage level as VCC. With both the infrared light source and the photo diode in a single package, the photo-interrupter employs transmissive technology to sense obstacles existence, acts as on / off switchers or even to sense lowresolution rotary or linear motions. The photointerrupter is specified for operation over -25 °C to +85 ºC temperature range. Regarding the photo-interrupter output, there will always be current output measured but with the external resistor, RL connected as shown in Figure1, analog voltage output could then be obtained. As a basic switcher, the photo-interrupter would have a position detecting characteristics as shown in Figure 2. These characteristic diagrams give the relationship between Relative Light Current, IL and Distance of displacement, d. Note that the slot (obstacle) introduced in between the emitting diode and the photo-diode could applied in two directions. One is of X-axis and another would be of Y-axis. Sensing Position Characteristics Relative Light Current IL (%) (Typical) X 100 Y I F =20mA V CE =5V I F =20mA V CE =5V Ta=25 o C Ta=25 o C Therefore, with the presence of slot, the photointerrupter would actually give a low logic output. Vice versa, the photo-interrupter will provide a high logic output without the existence of the slot. Refer to Figure 3. Typically, Rise Time, tr and Fall Time tf will have the same value, 15µs. With special design of the slots, periodic presence and absence could be generated. Such output signal is useful in determining low-resolution (>0.5mm pitch) motor rotation positioning and motor spinning speed. 50 0 Input -3 -2 -1 0 1 2 3 -3 -2 -1 0 1 2 3 t Distance d (mm) 90 % 10 % Output t tr X-Direction tf Figure 3: Response Time Measurement of Output Signal. Output - 0 + Figure 4: Periodical Output signal could be used to determine the Motor Spinning Speed and Rotation positioning. Y-Direction 0 + Figure 2: Illustrates Photo-Interrupter Positioning Sensing Characteristics. Obstacles (Slots) could interrupt along X-axis or Y-axis 2 Absolute Maximum Ratings @ TA=25°°C Parameter Maximum Rating Unit Reverse voltage 5 V Forward current 50 mA Forward surge current (10µs pulse) 1 A Collector Emitter voltage 30 V Emitter Collector voltage 5 V Power dissipation 175 mW Operation temperature range -25°C to 85°C Storage temperature range -40°C to 85°C Soldering temperature 260°C for 5 seconds Optical-Electrical Characteristics TA=25°C Parameter Symbol Min. Typ. Max. Unit Test Conditions Forward voltage VF - 1.2 1.35 V IF=20mA Collector Current IC 0.8 - 10 mA IF=20mA, Vce = 5V Collector Emitter voltage VCEO 30 - - V Ie=0.1mA, Ee=0mW/cm2 Emitter Collector voltage VECO 5 - - V Ie=0.1mA, Ee=0mW/cm2 Collector dark current ICEO - - 100 nA VCE=10V, Ee=0mW/cm2 Collector Emitter saturation voltage VCE(SAT) - - 0.4 V Ie=0.5mA, Ee=0.1mW/cm2 Rising time Tr - 15 - µs VCE=5V, RL=1kΩ, IC=1mA Falling time Tf - 15 - µs 3 Outline Drawing Units in mm 4 IC-Normalized Collector Current ICEO-Collector Dark Current-µA Typical Optical-Electrical Curves 1000 100 10 1 0.1 0.01 0.001 0 40 80 120 o TA - Ambient Temperature - C 40 0 2 4 6 8 R L - Load Resistance - KΩ 10 Forward Current (mA) 80 60 40 20 1.2 1.6 2.0 2.4 Forward Voltage (V) Figure 9: Forward Current Vs Forward Voltage 5 125 Vce = 5 V 4 3 2 1 0 0 1 2 3 4 5 2 Figure 8: Relative Collector Current Vs Irradiance 100 0 75 Ee - Irradiance - mW/cm Figure 7: Rise and Fall Times Vs Load Resistance 0 25 Figure 6: Normalized Collector Current Vs Ambient Temperature Relative Collector Current Tr Tf Rise and Fall Time - uS 80 0 -25 5 F = 100 Hz PW = 1 ms 120 0.5 0.0 -75 T A - Ambient Temperature - C Vcc = 5 V V RL = 1 V 160 2.0 1.5 1.0 o Figure 5: Collector Dark Current Vs Ambient Temperature 200 4.0 Vce =5 V 3.5 2 Ee =0.1 mW/cm 3.0 @ l = 940 nm 2.5 2.8 6 For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved. AV01-0363EN - August 21, 2006