HOA0901 Transmissive Encoder Sensor FEATURES • Dual channel IC • Direct TTL interface • Inverting logic output • Resolution to 0.009 in.(.229 mm) • Internal temperature compensation • 0.126 in.(3.2 mm) slot width • Two mounting configurations OUTLINE DIMENSIONS in inches (mm) Tolerance 3 plc decimals ±0.010(0.25) 2 plc decimals ±0.020(0.51) HOA0901-011 .315(8.0) .419(10.64) OPTICALC L .181(4.60) .488 (12.40) S The detector is a monolithic IC which consists of two narrow adjacent photodiodes, amplifiers, and Schmitt trigger output stages. The outputs are NPN collectors with internal 10 kì (nominal) pull-up resistors to VÙÙ which are capable of directly driving TTL loads. The IC design incorporates circuitry to compensate the sensitivity for the output power vs. temperature characteristic of the IRED. The sensing areas of the IC are each 0.008 in.(.203 mm) in width and .015 in.(.381mm) in height with a 0.001 in.(.0254 mm) separation for a center- to- center spacing of 0.009 in.(.229 mm) and outside edge to edge distance of 0.017 in.(.432 mm). The device is designed to operate with an encoder period as small as 0.036 in.(.914 mm) and, with proper processing logic, can resolve motion to 0.009 in.(.229 mm). INFRA-78.TIF .020(0.51) SQ. LEADS TYP. .083(2.1) .05(1.27) 3 PLCS .075(1.91) .050 4 .126(3.20) .300(7.62) 3 1 E DESCRIPTION The HOA0901 sensor consists of a dual channel IC detector and an IRED encased in a black thermoplastic housing. The device is typically used with an interrupter strip or disk (code wheel) to encode the rate and direction of mechanical motion. Applications include linear and rotary encoders; it is especially suited for the encoding function in an optical mouse. As the interruptive pattern moves, the detector generates two output signals which can be processed to provide speed and direction information. 6 5 2 .090(2.3) .100(2.54) LEADS .100(2.54) 1. CATHODE 2. ANODE 3. OUTPUT A 4. GND 5. Vcc 6. OUTPUT B .500(12.7) MIN DIM_059.ds4 HOA0901-012 Two package styles are available. HOA0901- 011 is primarily intended for direct PCB mounting. HOA0901- 012 has mounting tabs for chassis mounting. The HOA0901 series employs plastic molded components. For additional component information see SEP8506 and HLC2701. Housing material is polycarbonate. Housings are soluble in chlorinated hydrocarbons and ketones. Recommended cleaning agents are methanol and isopropanol. 216 DIM_59b.ds4 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HOA0901 Transmissive Encoder Sensor ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS IR EMITTER DETECTOR COUPLED CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS (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 Supply Voltage Duration of Output Short to VÙÙ or Ground -40¡C to 70¡C -40¡C to 85¡C 240¡C 100 mW [À] 3V 50 mA 5.5 V 1.0 sec. Notes 1. Derate linearly 0.75 mW/¡C above 25¡C. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 217 HOA0901 Transmissive Encoder Sensor FUNCTIONAL BLOCK DIAGRAM OUTPUT CONFIGURATION WITH MOTION sch_042.cdr OUTPUT TIMING DIAGRAM SCH_039.cdr SWITCHING WAVEFORM cir_010.cdr Fig. 1 IRED Forward Bias Characteristics cir_011.cdr Fig. 2 IRED Trigger Current vs Temperature gra_073.ds4 •Normalized trigger current Forward current - mA gra_098.ds4 1.4 100 90 80 70 60 50 40 30 20 10 0 Pulsed condition TA = 80°C TA = 25°C TA = -40°C 0.8 1.0 1.2 1.4 1.6 1.8 2.0 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 Forward voltage - V -50 -25 0 25 50 75 100 125 Ambient temperature - °C All Performance Curves Show Typical Values 218 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HOA0901 Transmissive Encoder Sensor Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 219