HLC2701 Encoder Detector FEATURES • Side-looking plastic package • TTL/LSTTL/CMOS compatible • Inverting logic output • Linear or rotary encoder applications • Resolution to 0.009 in.(.229 mm) • Sensitivity versus temperature compensation • Mechanically and spectrally matched to SEP8506 and SEP8706 infrared emitting diodes INFRA-74.TIF DESCRIPTION The HLC2701 detector is designed to sense speed and direction of mechanical motion. Applications include rotary and linear encoders; the device is especially well suited for the encoding function in an optical mouse. The detector is a monolithic IC, consisting 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 can directly drive TTL loads. It incorporates circuitry to compensate the sensitivity for the output power versus temperature characteristics of an IRED. The IC is encapsulated in a molded, unlensed black plastic package which is transmissive to IR energy, yet provides shielding from visible light. OUTLINE DIMENSIONS in inches (mm) Tolerance 3 plc decimals ±0.005(0.12) 2 plc decimals ±0.020(0.51) In a typical application, the HLC2701 is used in conjunction with an IRED and an encoder disk or linear encoder strip attached to an element for which speed and direction of movement is to be sensed. As the interruptive pattern moves, the sensor provides two phase shifted output signals (active low) which can be processed to provide the speed and direction information. The sensing areas of the IC are each 0.008 in.(.203 mm) in width and in .015in.(.381 mm) in height with a 0.001 in.(.0254 mm) separation, for center- to- center spacing of 0.009 in.(.203 mm), and outside edge to edge distance of 0.017 in.(.432 mm). 208 DIM_030.cdr h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HLC2701 Encoder Detector ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS ABSOLUTE MAXIMUM RATINGS (25¡C Free-Air Temperature unless otherwise noted) Duration of Output Short to VÙÙ or Ground Operating Temperature Range Storage Temperature Range Soldering Temperature (5 sec) Honeywell reserves the right to make changes in order to improve design and supply the best products possible. 1.0 sec. -40¡C to 85¡C -40¡C to 85¡C 240¡C h 209 HLC2701 Encoder Detector FUNCTIONAL BLOCK DIAGRAM SWITCHING TIME TEST CIRCUIT SCH_045.cdr SWITCHING WAVEFORM cir_014.cdr Fig. 1 cir_011.cdr Responsivity vs Angular Displacement gra_066.ds4 Relative response - % 100% 90% 80% 70% 60% 50% -100 -80 -60 -40 -20 0 20 40 60 80 100 Angular displacement - degrees Fig. 2 Fig. 3 Threshold Irradiance vs Temperature 2.0 1.0 0.5 0.4 0.3 0.2 0.0 -40 -20 0 20 40 60 80 100 Rise time (TR) & fall time (TF) - ns Relative irradiance gra_060.ds4 Output Rise Time (t²) and Output Fall Time (t¶) vs Temperature 240 220 200 180 160 140 120 100 80 60 40 20 Symbol definition & test circuit per figures Rise time TR Fall time TF -40 Temperature - °C 210 gra_061.ds4 -20 0 20 40 60 80 100 Temperature - °C h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HLC2701 Encoder Detector Fig. 4 Delay Time vs Temperature Fig. 5 Spectral Responsivity gra_062.ds4 gra_050.ds4 3.8 3.4 Relative response Propagation delay - µs 4.2 TPLH 3.0 2.6 2.2 1.8 TPHL 1.4 0.0 -40 -20 0 20 40 60 80 100 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 600 Ambient temperature - °C 700 800 900 1000 1100 1200 Wavelength - nm All Performance Curves Show Typical Values Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 211