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| 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH Type UGN3275K latching Hall-effect sensors are bipolar integrated circuits designed for electronic commutation of brushless dc motors. They feature dual complementary outputs. The latches are typically used to sense matched magnetic flux densities of alternating polarity from multipole ring magnets. Data Sheet 27632.2 X V Each sensor IC includes a Hall voltage generator, operational amplifier, Schmitt trigger, voltage regulator, and dual bipolar output transistors. The regulator allows use of the integrated circuit with supply voltages of 4.5 V to 24 V. CC 1 2 3 4 Dwg. PH-002 If the Hall cell is exposed to a magnetic flux density greater than the operate threshold (BOP), OUTPUT goes low (turns ON) and OUTPUT goes high (turns OFF). The outputs will hold (latch) this state until magnetic field reversal exposes the Hall cell to a magnetic flux density below the release threshold (BRP) when OUTPUT will go high (OFF) and OUTPUT will go low (ON). This state is also latched. Under any condition one output is ON while the other is OFF. Because the operating state switches only with magnetic field reversal, and not merely with a change in the strength, these integrated circuits qualify as true Hall-effect latches. Similar devices, with a 500 mA continuous output current rating, are available as the UGN5275K. These complementary-output Hall-effect latches are supplied in a four-pin plastic SIP, 0.200" (5.08 mm) wide, 0.130" (3.3 mm) high, and 0.060" (1.54 mm) thick. Pinning is shown viewed from branded side. GROUND OUTPUT SUPPLY OUTPUT FEATURES s s s s s s s Operable with Multipole Ring Magnets High Reliability Small Size Output Compatible with All Digital Logic Families 4.5 V to 24 V Operation High Hysteresis Level Minimizes Stray-Field Problems Complementary Outputs ABSOLUTE MAXIMUM RATINGS Power Supply, VCC . . . . . . . . . . . . . . . . 25 V Magnetic Flux Density, B . . . . . . Unlimited Output OFF Voltage, VOUT . . . . . . . . . . 25 V Output ON Current, IOUT . . . . . . . . . . 50 mA Operating Temperature Range, TA . . . . . . . . . . . . . . . . . -20C to +85C Storage Temperature Range, TS . . . . . . . . . . . . . . . . -65C to +150C Always order by complete part number: UGN3275K . 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH SENSOR LOCATION FUNCTIONAL BLOCK DIAGRAM ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.096" 2.44 mm 1 VCC 2 0.047" 1.21 mm OUTPUT REG. A BRANDED SURFACE 1 2 3 4 X 3 OUTPUT GROUND 4 Dwg. FH-002 Dwg. MH-001-2A ELECTRICAL CHARACTERISTICS at TA = +25C, VCC = 4.5 V to 24 V (unless otherwise noted). Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Fall Time Symbol VCC VOUT(SAT) IOFF lCC tr tf Test Conditions Operating VCC = 4.5 V, I OUT = 20 mA, B > B OP VOUT = 24 V, VCC = 24 V, B < BRP VCC = 24 V, B < B RP VCC = 12 V, RL = 820 , CL = 20 pF VCC = 12 V, RL = 820 , CL = 20 pF Min. 4.5 -- -- -- -- -- Typ. -- -- -- -- 0.04 0.18 Max. 24 400 10 7.0 0.4 0.4 Units V mV A mA s s MAGNETIC CHARACTERISTICS TA = +25C Characteristic Operate Point Release Point Hysteresis Symbol BOP BRP Bhys Min. 25 -250 100 Max. 250 -25 -- T A = -20C to +85C Min. 15 -250 100 Max. 250 -15 -- Units G G G NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention). 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1991, 1995 Allegro MicroSystems, Inc. 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 0.208 0.203 5.28 5.16 45 0.063 0.059 45 1.60 1.50 0.138 0.133 45 0.085 MAX 3.51 3.38 45 2.16 MAX 1 2 3 4 0.033 1 2 3 4 0.84 0.600 0.560 0.015 15.24 14.23 0.38 SEE NOTE SEE NOTE 0.016 0.050 BSC Dwg. MH-009C in 0.41 1.27 BSC Dwg. MH-009C 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. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm). 5. Where no tolerance is specified, dimension is nominal. 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. 3275 COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH HALL-EFFECT SENSORS SELECTION GUIDE Partial Part Number 3046 3054 3056 3058 3059 3060 3121 3122 3123 3132 3133 3134 3141 3142 3143 3144 3161 3175 3177 3185 3187 3188 3189 3195 3197 3235 3275 3421 3422 3503 3515 3516 3517 3518 3625 3626 5140 Avail. Oper. Temp. E/L K/S E/L E/L K/S K/S E/L E/L E/L K/L/S K/L/S E/L E/L E/L E/L E/L E S S E/L E/L E/L E/L E/L L S S E/L E/L S E/L E/L L/S L/S S S E Operate Limits Over Temp. BOP max BRP min Bhys min +200 -200 +300 +5 +225 -225 +300 -300 +100 -100 +35 -35 +500 +80 +430 +120 +470 +160 +95 -95 +75 -75 +50 -40 +175 +10 +245 +60 +355 +150 +450 +25 +160 +30 +180 -180 +150 -150 +300 -300 +175 -175 +200 -200 +250 -250 +200 -200 +200 -200 +200 +15 -200 -15 +250 -250 +300 -300 +85 -85 Typ. 1.3 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G +150 -150 +150 -150 +240 +25 15 5.0 15 150 20 10 60 70 70 30 30 10 20 30 30 20 5.0 80 50 280 100 160 100 110 110 15 15 100 240 10 - - - - - 200* 200* 20 Function Notes Gear-Tooth Sensor Unipolar Multiplex 1 Gear-Tooth Sensor Gear-Tooth Sensor AC Gear-Tooth Sensor AC Gear-Tooth Sensor Unipolar Switch Unipolar Switch Unipolar Switch Bipolar Switch Bipolar Switch Bipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch 2-Wire Unipolar Switch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch 2, 3 Bipolar Latch 3 Unipolar Switch 4 Unipolar Switch Bipolar Latch 5 Direction Detection Direction Detection Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor 900 mA Bipolar Latch 3, 5, 6 400 mA Bipolar Latch 3, 5, 6 300 mA Unipolar Switch 3, 6 Operating Temperature Ranges: C = 0C to +70C, S = -20C to +85C, E = -40C to +85C, K = -40C to +125C, L = -40C to +150C Notes 1. Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition. 2. Active pull down. 3. Protected. 4. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 5. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. 6. Power driver output. * Typical. Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal for reliable operation over operating temperature range. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 |
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