The CLE390 consists of an AlGaAs 850-nm IR-emitting diode bonded to a ceramic substrate, and a monitor photodiode, both mounted on a three-leaded TO-46 header and hermetically sealed in a glass-domed metal lens can. Available from Clairex Technologies Inc., the RoHS-compliant device has applications in backlight displays, encoder feedback, touchscreens, wafer probing, ambient light sampling and instrument lighting in automobiles. Circuitry can be developed to adjust the I_F on the emitter as it ages to ensure constant output level. At I_F = 100 mA, typical irradiance is 1.5 mW/cm² (>60 mW/sr), typical forward voltage is 1.7 V, the emission angle at the half power points is 22° and output rise/fall time is 20/40 ns. Typical coupled light current on the photodiode is 0.5 mA.

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