HOA1879 Transmissive Sensor FEATURES • Phototransistor output • Accurate position sensing • Choice of detector aperture • 0.125 in.(3.18 mm) slot width • Dust protective housing INFRA-40.TIF DESCRIPTION The HOA1879 series consists of an infrared emitting diode facing an NPN silicon phototransistor encased in a black IR transmissive thermoplastic housing. Detector switching takes place whenever an opaque object passes through the slot between emitter and detector. The HOA1879 series employs an IR transmissive housing which features smooth optical faces without external aperture openings; this feature is desirable when aperture blockage from airborne contaminants is a possibility. The HOA1879-011 and -012 have a 0.060 in.(1.52 mm) dia. detector aperture, while the HOA1879015 has a 0.010 in.(.25 mm) x 0.040 in. (1.02 mm) vertical aperture in front of the detector. This feature is ideal for use in applications where maximum position resolution is desired. The HOA1879 series employs plastic molded components. For additional component information see SEP8506 and SDP8406. OUTLINE DIMENSIONS in inches (mm) Tolerance 3 plc decimals ±0.010(0.25) 2 plc decimals ±0.020(0.51) Housing material is IR transmissive polysulfone. Housings are soluble in chlorinated hydrocarbons and ketones. Recommended cleaning agents are methanol and isopropanol. DIM_051.cdr 310 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HOA1879 Transmissive Sensor ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS IR EMITTER DETECTOR COUPLED CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS SCHEMATIC (25¡C Free-Air Temperature unless otherwise noted) Operating Temperature Range Storage Temperature Range Soldering Temperature (5 sec) IR EMITTER Power Dissipation Reverse Voltage Continuous Forward Current DETECTOR Collector-Emitter Voltage Emitter-Collector Voltage Power Dissipation Collector DC Current Honeywell reserves the right to make changes in order to improve design and supply the best products possible. -40¡C to 85¡C -40¡C to 85¡C 240¡C 100 mW [À] 3V 50 mA 30 V 5V 100 mW [À] 30 mA h 311 HOA1879 Transmissive Sensor Fig. 1 IRED Forward Bias Characteristics Fig. 2 gra_092.ds4 Pulsed condition TA = 80 °C TA = 25 °C TA = -40 °C 100 Photodarlington 10 Phototransistor 1 0.8 1.0 1.2 1.4 1.6 1.8 10 2.0 100 Fig. 4 gra_301.cdr Normalized collector current Dark Current vs Temperature 1000 10000 Load resistance - Ohms Forward voltage - V Fig. 3 gra_096.ds4 1000 Response time - µs Forward current - mA 100 90 80 70 60 50 40 30 20 10 0 Non-Saturated Switching Time vs Load Resistance Collector Current vs Ambient Temperature gra_095.ds4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -50 -25 0 25 50 75 100 Free-air temperature - °C All Performance Curves Show Typical Values 312 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HOA1879 Transmissive Sensor Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 313