3390 ALLEGRO
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_ > ALLEGRO MICROSYSTEMS INC 33E D -MM 0504338 GOOS4Sb T MMALGR i 3390 . eae re ; , scoot dita eS isaac ite a aS on Sa re Slncntia an OPTOELECTRONIC SWITCH Designed for use in twilight sensing applications and in emergency and outdoor lighting, the ULN3390T optoelectronic switch is a mono- lithic integrated circuit containing a photodiode, low-level amplifier, comparator, voltage regulator, and output driver. The comparator is fabricated to give the sensor a built-in typical hysteresis value of 50 percent. . . With temperature-compensated trip points, protection against damage by bright light, and increased hysteresis values, the ULN3390T represents a significant design improvement over previous optoelec- tronic switches. The integrated sensor is more stable over time and temperature than cadmium sulfide cell assemblies, requires fewer components, and has calibrated switching characteristics. The UNL8390T switch typically turns ON as illumination falls below 10 uW/cm?at 880 nm, Internal hysteresis prevents deactivation until fllumination exceeds 20 pW/cm?. The switching points can be factory- adjusted to customer specifications. 5 2 3 FEATURES . E ic} s '@ Photodiode with On-Chip fo} 5 a ‘Amplifier Comparator Output Driver Owe, Pi-co9 Voltage Regulator @ 50% Hysteresis ™_ Temperature Compensation ABSOLUTE MAXIMUM RATINGS Supply Voltage, Vog .+.seeeeeeeeiee 28V : Output Voltage, Voyy seeeee eee eeee e 28V Output Current, loypeeeeeeeeee cee 25 MA : . Operating Temperature Range, Tye cece eeeue eee n es 40°C to 485°C Storage Temperature Range, Tye eeee sense eee s BEC to 4110°C Always order by complete part number: [ULN3390T]. RR 4-38
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ry sea ae cee Soh net nr ages cee Salar Bila meme ne eee oe oe ances ecg cee mete A : ALLEGRO MICROSYSTEMS INC 33E D MM 0504338 0005458 3 MMALGR Bence nee SENSOR-CENTER LOCATION (52mm ¢ 13mm) - . —-- * | : . | PHOTOSENSITIVE AREA - lI WU . ry OY OS wo. No. A3301 ; RELATIVE SPECTRAL RESPONSE AT T, = +25°C AS A FUNCTION OF WAVELENGTH OF LIGHT ag <= = ‘a Bas 3 3 e3 reac sco & RADIOMETRIC oe RESPONSE
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5 0.6 > ae Pt | AR A ¢ J PHotorIC. g. RESPONSE (HUMAN EYE) \\S 0.2) 8: U LY] iH S A 8 | | PAR : ‘. i fe} 300 = 400 500 600 700 800 900 1000 =1100 WAVELENGTH IN NANOMETERS wo Ne. A2t05h 4-40