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OPB350W125Z Datasheet(PDF) 10 Page - OPTEK Technologies |
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OPB350W125Z Datasheet(HTML) 10 Page - OPTEK Technologies |
10 / 24 page 10 OCB100-KIT THEORY OF OPERATION OPB732 / OPB732WZ The OPB732 (PCB mount, no mounting tabs) and OPB732WZ (mounting tabs and wires) are non-focused analog output reflective sensors designed to operate from .05” [1.27mm] to 2”[50.8mm] or greater with an output signal significantly above the typical back- ground signal in a dark environment. These sensors are tested against a white 90% reflectance white card at a distance of 1.0” to guaran- tee a minimum Ic (ON) collector current of 0.25mA @ VCE = 0.4V and IF = 30mA. Other surfaces will give different signal levels. Infrared light with a center wavelength of about 850nm is emitted from an LED with a total half power angle (ØHP, Beam Angle) around 18°. When the light strikes an object, it is reflected back toward the phototransistor. The amount of current Ic (ON) generated from the phototransistor is dependent upon the amount of light striking it. The following graph shows the effect of target distance on the output current of the OPB732. |
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