plastic fiber optic ir leds if-e91 plastic fiber optic ir leds if-e91 41 industrial fiber optics, inc. www.i-fiberoptics.com parameter symbol IF-E91A if-e91b* unit peak wavelength peak 950 880 nm spectral bandwidth (50% of i max ) ? 40 80 nm output power coupled into plastic fiber (1 mm core diameter). distance lens to fiber min >100 >75 ? 0.1 mm, 10 cm polished fiber, i f =20 ma -10 -11.2 dbm switching times (10% to 90% and 90% to 10%) (r l =47 ? , i f =10 ma) t r , t f 1.0 0.5 s capacitance c 0 25 25 pf forward voltage (i f =50 ma) v f 1.5 max 1.7 max v temperature coefficient, peak tc 0.3 0.3 nm/k a pplications ? low-cost analog and digital data links ? digitized audio ? optical sensors ? medical instruments ? robotics communications ? motor controller triggering ? emc/emi signal isolation ? electronic games ? intra-system links: board-to- board, rack-to-rack d escription the IF-E91A and if-e91b are high-output medium-speed infrared leds in a ?onnector-less?style plastic fiber optic package. the output spectrum peaks at 950 nm for the IF-E91A and 880 nm for the if-e91b. the device package features an internal micro-lens, and a precision-molded pbt housing ensures efficient optical coupling into standard 1000 ? plastic fiber cable. a pplication h ighlights the high output and fast transition times of the IF-E91A and if-e91b make them suitable for low-cost analog and digital data links. used with an if-d96 photologic detector, the IF-E91A and if-e91b can achieve data rates of 500 kbps and 1 mbps respectively at link distances up to 7 m. the drive circuit design is simpler than required for laser diodes, making the IF-E91A and if-e91b excellent low-cost alternatives in a variety of analog and digital applications. f eatures excellent linearity no optical design required mates with standard 1000 ? core jacketed plastic fiber cable internal micro-lens for efficient coupling inexpensive plastic connector housing connector-less fiber termination and connection interference-free transmission from light-tight housing m aximum r atings (t a = 25?) operating and storage temperature range (t op ,t stg ) .....................-40 to 85 c junction temperature (t j ) .............85 c soldering temperature (2 mm from case bottom) (t s ) t 5 s .................................240 c reverse voltage (v r ).........................3 v power dissipation (p tot ) t a = 25?...................100 mw de-rate above 25? ..........1.33 mw/ c forward current, dc (i f ) IF-E91A ....................................50 ma if-e91b ..................................100 ma surge current (i fsm ) t 10 ?ec IF-E91A ........................................ 2 a if-e91b .........................................2 a c haracteristics (t a =25?) * if-e91d recommended for new designs catalogfilm_12601. 12/20/01 4:30 pm page 61
if-e91 plastic fiber optic ir leds if-e91 plastic fiber optic ir leds 42 industrial fiber optics, inc. www.i-fiberoptics.com f igure 4. case outline. f igure 3. cross-section of fiber optic device. f iber t ermination i nstructions 1. cut off the ends of the optical fiber with a single- edge razor blade or sharp knife. try to obtain a precise 90-degree angle (square). 2. insert the fiber through the locking nut and into the connector until the core tip seats against the internal micro-lens. 3. screw the connector locking nut down to a snug fit, locking the fiber in place. f igure 1. normalized power launched versus forward current. f igure 2. typical spectral output vs. wavelength. p ackage i dentification : e91a blue housing w/ blue dot e91b blue housing w/ green dot pin 1. cathode pin 2. anode catalogfilm_12601. 12/20/01 4:30 pm page 58
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