3503

3503 ALLEGRO

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Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS Operating Temperature Range, Storage Temperature Range, RATIOMETRIC, LINEAR HALL-EFFECT SENSORS 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. 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. Three package styles provide a magnetically optimized package for most applications. Package suffix ‘LT’ is a miniature SOT-89/TO- 243AA transistor package for surface-mount applications; suffix ‘U’ is a miniature three-lead plastic SIP, while ‘UA’ is a three-lead ultra-mini- SIP. All devices are rated for continuous operation over the temperature range of -20°C to +85°C. Data Sheet 27501B* 3503 Always order by complete part number, e.g., UGN3503UA .

FEATURES

I 4.5 V to 6 V Operation I Magnetically Optimized Package Dwg. PH-006 SUPPLY VCC GROUND OUTPUT X

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000 ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 5 V FUNCTIONAL BLOCK DIAGRAM VCC X Dwg. FH-007 GROUND OUTPUT3 REG. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Operating Voltage V CC 4.5 — 6.0 V Supply Current I CC —9 . 0 1 3m A Quiescent Output Voltage V OUT B = 0 G 2.25 2.50 2.75 V Sensitivity ∆VOUT B = 0 G to ±900 G 0.75 1.30 1.75 mV/G Bandwidth (-3 dB) BW — 23 — kHz Broadband Output Noise V out BW = 10 Hz to 10 kHz — 90 — µV Output Resistance R OUT — 50 220 Ω Copyright © 1985, 1999, Allegro MicroSystems, Inc. All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 k Ω. 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.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE DEVICE SENSITIVITY AS A FUNCTION OF SUPPLY VOLTAGE OUTPUT NULL VOLTAGE AS A FUNCTION OF SUPPLY VOLTAGE LINEARITY AND SYMMETRY AS A FUNCTION OF SUPPLY VOLTAGE OUTPUT VOLTAGE AS A FUNCTION OF TEMPERATURE OUTPUT NOISE AS A FUNCTION OF FREQUENCY Dwg. A-12,573 Dwg. A-12,505 Dwg. A-12,506 Dwg.A-12,509Dwg. A-12,508 VCC = 5V AMBIENT TEMPERATURE IN C OUTPUT IN VOLTS 4.0 3.5 3.0 2.5 2.0 1.5 40 20 0 +25 +85 +125 B= +500G B = 0G B= -500G 9.0 8.0 7.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE IN VOLTS SUPPLY CURRENT IN mA B = 0G TA = +25°C 5.0 4.0 3.0 2.0 1.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE IN VOLTS OUTPUT NULL VOLTAGE IN VOLTS B = 0G TA = +25°C VCC = +5V TA = +25°C 8.0 6.0 4.0 2.0 10 100 1K 10K FREQUENCY IN HZ OUTPUT NOISE IN µ Vrms √HZ Dwg. A-12,507 TA = +25°C LINEARITY AND SYMMETRY IN PERCENT 100 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE IN VOLTS OUTPUT SYMMETRY LINEARITY BELOW NULL LINEARITY ABOVE NULL B = -900G B = +900G TA = +25°C TYPICAL SENSITIVITY IN V/G 2.5 2.0 1.5 1.0 0.5 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE IN VOLTS

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Worcester, Massachusetts 01615-0036 (508) 853-5000 GEAR TOOTH SENSOR CURRENT MONITOR OPERATION 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 Hall- effect 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. 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. SUFFIX “LT” SUFFIX “UA” Dwg. A-12,513 Dwg. A-12,512 N NOTCH SENSOR Dwg. A-12,574 SENSOR LOCATIONS SUFFIX “U” A 1 3 Dwg. MH-002-5C 0.015" 0.38 mm NOM 0.072" 1.83 mm BRANDED SURFACE ACTIVE AREA DEPTH 0.093" 2.37 mm 0.042" 1.08 mm 1 32 Dwg. MH-008-9 0.030" 0.76 mm NOM ACTIVE AREA DEPTH 0.091" 2.32 mm A 1 3 Dwg. MH-011-3C 0.018" 0.46 mm NOM BRANDED SURFACE ACTIVE AREA DEPTH 0.056" 1.43 mm A 0.084" 2.13 mm

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions) UGN3503LT (SOT-89/TO-243AA) NOTE:Exact body and lead configuration at vendor’s option within limits shown. B 0.098 0.031 0.102 0.047 0.181 0.079 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 0.028 TYP 0.031 TYP A Dwg. MA-009-3 in 1 23 0.064 0.072 0.155 0.167 0.059 BSC 0.014 0.0190.035 0.047 0.090 0.102 0.055 0.063 0.014 0.017 0.084 0.090 0.017 0.022 0.118 BSC 0.173 0.181 Dwg. MA-009-3 mm 1 23 4.40 4.60 1.62 1.83 3.94 4.25 1.50 BSC 0.36 0.480.89 1.20 2.29 2.60 1.40 1.60 0.35 0.44 2.13 2.29 0.44 0.56 3.00 BSC B 2.5 0.8 2.6 1.2 4.6 2.0 Dwg. MA-012-3 mm 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 0.7 TYP 0.8 TYP A

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Worcester, Massachusetts 01615-0036 (508) 853-5000 Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) Dwg. MH-003D in 0.063 0.059 0.018 0.015 0.016 0.050 1 2 3 0.100 45° SEE NOTE 0.183 0.178 0.181 0.176 0.600 0.560 0.086 MAX UGN3503U Dwg. MH-003D mm 1.60 1.50 0.46 0.38 0.41 1.27 1 2 3 2.54 45° SEE NOTE 4.65 4.52 4.60 4.47 15.24 14.23 2.18 MAX 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. Devices in the ‘U’ package are NOT RECOMMENDED FOR NEW DESIGN

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) UGN3503UA Dwg. MH-014D mm 4.17 4.04 1.57 1.47 0.38 1.27 BSC 45° 16.26 15.24 0.41 2.16 MAX 45° 0.79123 3.10 2.97 SEE NOTE Dwg. MH-014D in 0.164 0.159 0.062 0.058 0.015 0.050 BSC 45° 0.640 0.600 0.016 0.085 MAX 45° 0.031123 0.122 0.117 SEE NOTE 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.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Worcester, Massachusetts 01615-0036 (508) 853-5000 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 responsi- bility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.