22.10.2013 r lt8505mg 1 of 2 r lt8505mg technical data infrared laser diode features ? algaas laser diode ? peak wavelength: 850 nm ? optical ouput power: 5 mw ? package: 5.6 mm, with photo d iode electrical connection pin configuration bottom view n - type pin functio n 1 ld cathode 2 ld anode, pd cathode 3 pd anode absolute maximum ratings (t c =25c) item symbol value unit cw output power p o 5 mw ld reverse voltage v r (ld) 2 v pd reverse voltage v r (pd) 30 v operating case temperature t c - 10 ? + 4 0 c storage temperature t stg - 40 ? +85 c specifications (t c =25c) item symbol min. typ. max. unit optical specifications cw output power p o - 5 - mw peak wavelength * p 845 850 855 nm fwhm beam divergence U 8 1 0 1 1 deg 25 3 0 40 deg electrical specifications threshold current i th 5 10 1 5 ma operating current i op 15 20 2 5 ma slope efficiency 0.4 0. 5 0. 5 5 w/a operating voltage u op 1 .8 1.9 2 .0 v monitor current i m 0. 3 0. 5 1 .0 ma * measuring specifications. the above specifications are for reference purpose only and subjected to change without prior notice.
22.10.2013 r lt8505mg 2 of 2 package dimensons 5.6 mm package ( unit:mm ) cautions 1. operating methode ? this ld shall change its forward voltage requirement and optical ouput power according to temperature change. also, the ld will require more operation current to maintain same ouput power as it degrades. in order to m aintain output power, use of apc (automatic power control) is recommended. which use monitor feedback to adjust the operation current. ? confirm that electrical spike current generated by switching on and off does not exceed the maximum operating current lev el specified herein above as absolute maximum rating. also, employ appropriat countermeasures to reduce chattering and/or overshooting in the circuit. 2. static electricity ? static electricity or electrical surges will reduce and degrade the reliability of th e lds. it is recommended to use a wrist trap or anti - electrostatic glove when handeling the product. 3. absolute maximum rating ? active layer of lds shall have high current density and generate high electric field during its operation. in order to prev ent excessive damage, the ld must be operated striclty below absolute maximum rating.
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