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3503 The UGN3503LT, UGN3503U, and UGN3503UA Hall-effect sensors accurately track extremely small changes in magnetic flux density—changes generally too small to operate Hall-effect switches. RATIOMETRIC, LINEAR HALL-EFFECT SENSORS As motion detectors, gear tooth sensors, and proximity detectors, they are magnetically driven mirrors of mechanical events. As sensitive monitors of electromagnets, they can effectively measure a system's performance with negligible system loading while providing isolation from contaminated and electrically noisy environments. Each Hall-effect integrated circuit includes a Hall sensing element, linear amplifier, and emitter-follower output stage. Problems associated with handling tiny analog signals are minimized by having the Hall cell and amplifier on a single chip. 2 3 Data Sheet 27501B* V CC 1 X GROUND OUTPUT SUPPLY Three package styles provide a magnetically optimized package for most applications. Package suffix ‘LT’ is a miniature SOT-89/TO243AA transistor package for surface-mount applications; suffix ‘U’ is a miniature three-lead plastic SIP, while ‘UA’ is a three-lead ultra-miniSIP. All devices are rated for continuous operation over the temperature range of -20°C to +85°C. Dwg. PH-006 FEATURES I I I I I Extremely Sensitive Flat Response to 23 kHz Low-Noise Output 4.5 V to 6 V Operation Magnetically Optimized Package Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC ............................. 8 V Magnetic Flux Density, B ......... Unlimited Operating Temperature Range, TA ............................ -20°C to +85°C Storage Temperature Range, TS ........................... -65°C to +150°C Always order by complete part number, e.g., UGN3503UA . 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FUNCTIONAL BLOCK DIAGRAM 1 VCC REG. X 3 OUTPUT 2 GROUND Dwg. FH-007 ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 5 V Limits Characteristic Operating Voltage Supply Current Quiescent Output Voltage Sensitivity Bandwidth (-3 dB) Broadband Output Noise Output Resistance Symbol VCC ICC VOUT ∆VOUT BW Vout ROUT BW = 10 Hz to 10 kHz B=0G B = 0 G to ±900 G Test Conditions Min. 4.5 — 2.25 0.75 — — — Typ. — 9.0 2.50 1.30 23 90 50 Max. 6.0 13 2.75 1.75 — — 220 Units V mA V mV/G kHz µV Ω All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 kΩ. Magnetic flux density is measured at most sensitive area of device located 0.016" (0.41 mm) below the branded face of the ‘U’ package; 0.020" (0.51 mm) below the branded face of the ‘UA’ package; and 0.030" (0.76 mm) below the branded face of the ‘LT’ package. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1985, 1999, Allegro MicroSystems, Inc. 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS OUTPUT VOLTAGE AS A FUNCTION OF TEMPERATURE 4.0 OUTPUT NOISE AS A FUNCTION OF FREQUENCY 10 OUTPUT NOISE IN µ Vrms √HZ 3.5 VCC = 5V B= +500G 8.0 VCC = +5V TA = +25°C 6.0 OUTPUT IN VOLTS 3.0 B = 0G 2.5 4.0 2.0 2.0 B= -500G 1.5 0 40 20 0 +25 AMBIENT TEMPERATURE IN C +85 +125 10 100 FREQUENCY IN HZ 1K 10K Dwg. A-12,573 Dwg. A-12,505 SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE 12 11 B = 0G TA = +25°C DEVICE SENSITIVITY AS A FUNCTION OF SUPPLY VOLTAGE 2.5 SUPPLY CURRENT IN mA TYPICAL SENSITIVITY IN V/G 2.0 TA = +25°C 10 1.5 9.0 1.0 8.0 0.5 7.0 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0 0 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0 Dwg. A-12,506 Dwg. A-12,507 OUTPUT NULL VOLTAGE AS A FUNCTION OF SUPPLY VOLTAGE 5.0 B = 0G OUTPUT NULL VOLTAGE IN VOLTS LINEARITY AND SYMMETRY AS A FUNCTION OF SUPPLY VOLTAGE 100 LINEARITY AND SYMMETRY IN PERCENT OUTPUT SYMMETRY 99 4.0 TA = +25°C W ITY BELO LINEAR G B = -900 NULL 3.0 98 VE NU ITY ABO LINEAR G B = +900 LL 2.0 97 TA = +25°C 96 1.0 0 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0 95 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0 Dwg. A-12,508 Dwg.A-12,509 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS OPERATION NOTCH SENSOR The output null voltage (B = 0 G) is nominally one-half the supply voltage. A south magnetic pole, presented to the branded face of the Halleffect sensor will drive the output higher than the null voltage level. A north magnetic pole will drive the output below the null level. In operation, instantaneous and proportional output-voltage levels are dependent on magnetic flux density at the most sensitive area of the device. Greatest sensitivity is obtained with a supply voltage of 6 V, but at the cost of increased supply current and a slight loss of output symmetry. The sensor's output is usually capacitively coupled to an amplifier that boosts the output above the millivolt level. In two applications shown, a permanent bias magnet is attached with epoxy glue to the back of the epoxy package. The presence of ferrous material at the face of the package acts as a flux concentrator. Dwg. A-12,574 GEAR TOOTH SENSOR The south pole of a magnet is attached to the back of the package if the Hall-effect IC is to sense the presence of ferrous material. The north pole of a magnet is attached to the back surface if the integrated circuit is to sense the absence of ferrous matrial. Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available. N SENSOR LOCATIONS SUFFIX “U” ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.093" 2.37 mm 32 0.072" 1.83 mm 1 Dwg. A-12,512 CURRENT MONITOR A BRANDED SURFACE 1 2 3 Dwg. MH-002-5C SUFFIX “LT” ACTIVE AREA DEPTH 0.030" 0.76 mm NOM 0.091" 2.32 mm 0.042" 1.08 mm SUFFIX “UA” ACTIVE AREA DEPTH 0.018" 0.46 mm NOM 0.084" 2.13 mm 0.056" 1.43 mm A 1 2 3 BRANDED SURFACE A 1 2 3 Dwg. A-12,513 Dwg. MH-008-9 Dwg. MH-011-3C 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS UGN3503LT (SOT-89/TO-243AA) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions) 0.173 0.181 0.064 0.072 0.155 0.167 0.090 0.102 0.055 0.063 0.014 0.017 3.94 4.25 4.40 4.60 1.62 1.83 2.29 2.60 1.40 1.60 0.35 0.44 1 2 3 0.084 0.090 1 2 3 2.13 2.29 0.035 0.047 0.059 BSC 0.014 0.019 0.017 0.022 0.118 BSC Dwg. MA-009-3 in 0.89 1.20 1.50 BSC 0.36 0.48 0.44 0.56 3.00 BSC Dwg. MA-009-3 mm 0.098 0.079 B A 0.031 0.102 0.181 3 0.047 0.031 TYP 2.5 2.0 B A 0.8 2.6 4.6 1.2 0.8 TYP 1 0.028 TYP 2 1 0.7 TYP 2 3 Pads 1, 2, 3, and A — Standard SOT-89 Layout Pads 1, 2, 3, and B — Low-Stress Version Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning Dwg. MA-012-3 in Pads 1, 2, 3, and A — Standard SOT-89 Layout Pads 1, 2, 3, and B — Low-Stress Version Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning Dwg. MA-012-3 mm NOTE:Exact body and lead configuration at vendor’s option within limits shown. 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS UGN3503U Dimensions in Inches (controlling dimensions) 0.183 0.178 0.063 0.059 Dimensions in Millimeters (for reference only) 4.65 4.52 1.60 1.50 0.181 0.176 45° 0.086 MAX 1 2 3 4.60 4.47 45° 2.18 MAX 1 2 3 0.018 0.46 0.600 0.560 0.016 SEE NOTE 0.015 15.24 14.23 0.41 SEE NOTE 0.38 0.050 0.100 Dwg. MH-003D in 1.27 2.54 Dwg. MH-003D mm Devices in the ‘U’ package are NOT RECOMMENDED FOR NEW DESIGN NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm). 5. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable, contact sales office before ordering. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS UGN3503UA Dimensions in Inches (controlling dimensions) 0.164 0.159 Dimensions in Millimeters (for reference only) 4.17 4.04 45° 0.062 0.058 45° 1.57 1.47 0.122 0.117 3.10 2.97 45° 0.031 2.16 MAX 1 2 3 45° 0.79 0.085 MAX 1 2 3 0.640 0.600 0.015 16.26 15.24 0.38 SEE NOTE 0.016 SEE NOTE 0.41 0.050 BSC Dwg. MH-014D in 1.27 BSC Dwg. MH-014D mm NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable, contact sales office before ordering. 3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000