Data Sheet 27631.4B* 3134 BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION X This low-hysteresis bipolar Hall-effect switch is an extremely temperature-stable and stress-resistant sensor especially suited for operation over extended temperature ranges to +150°C. Superior high-temperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point stability by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switch points that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. Its low hysteresis makes this device ideal for detecting small changes in magnetic field strength or for use with inexpensive magnets. CC 2 3 OUTPUT SUPPLY 1 GROUND V Dwg. PH-003A Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS at TA = +25°C Supply Voltage, VCC ............................. 30 V Reverse Battery Voltage, VRCC .......... -30 V Magnetic Flux Density, B .......... Unlimited Output OFF Voltage, VOUT .................. 30 V Reverse Output Voltage, VOUT ........... -0.5 V Continuous Output Current, IOUT ............................................ 25 mA Operating Temperature Range, TA Suffix ‘E–’ .................. -40°C to +85°C Suffix ‘L–’ ................ -40°C to +150°C Storage Temperature Range, TS .............................. -65°C to +170°C The device includes on a single silicon chip a voltage regulator, quadratic Hall-voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger, and a buffered open-collector output to sink up to 25 mA. The on-board regulator permits operation with supply voltages of 3.8 volts to 24 volts. The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix ‘L–’ is -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; suffix ‘–U’ is a three-lead plastic mini-SIP while suffix ‘–UA’ is a three-lead ultra-mini-SIP. Devices in the ‘U’ package are LAST-TIME BUY Orders accepted only until April 18, 2002 FEATURES ■ Superior Temperature Stability ■ Operation From Unregulated Supply ■ Open-Collector 25 mA Output ■ Reverse Battery Protection ■ Activate With Small, Commercially Available Permanent Magnets ■ Solid-State Reliability ■ Small Size ■ Resistant to Physical Stress Always order by complete part number, e.g., A3134ELT . 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION FUNCTIONAL BLOCK DIAGRAM 1 VCC REG. X 3 OUTPUT 2 GROUND Dwg. FH-005-3 ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V. Limits Characteristic Symbol Supply Voltage VCC Min. Typ. Max. Units Operating 3.8 — 24 V VOUT(SAT) IOUT = 20 mA, B > BOP — 175 400 mV Output Leakage Current IOFF VOUT = 24 V, B < BRP — 0.05 1.0 µA Supply Current ICC B < BRP (Output OFF) — 3.2 9.0 mA B > BOP (Output ON) — 5.0 — mA Output Saturation Voltage Test Conditions Output Rise Time tr RL = 820 Ω, CL = 20 pF — 100 — ns Output Fall Time tf RL = 820 Ω, CL = 20 pF — 100 — ns MAGNETIC CHARACTERISTICS over operating supply voltage range. Limits Characteristic Symbol Operate Point BOP Release Point Hysteresis BRP Bhys Test Conditions Min. Typ. Max. Units at TA = +25°C -40 8.5 50 G Over Oper. Temp. Range -40 – 50 G at TA = +25°C -50 -19 40 G Over Oper. Temp. Range -50 – 40 G at TA = +25°C 10 27 50 G Over Oper. Temp. Range 5.0 – 55 G NOTES: BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP). As used here, negative flux densities are defined as less than zero (algebraic convention). Typical values are at TA = +25°C and VCC = 12 V. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1995, 2002 Allegro MicroSystems, Inc. 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION TYPICAL OPERATING CHARACTERISTICS SWITCH POINTS HYSTERESIS 50 40 VCC = 4.5 V–24 V 40 HYSTERESIS IN GAUSS SWITCH POINT IN GAUSS 20 OPERATE POINT 0 -20 VCC = 4.5 V–24 V 30 20 10 RELEASE POINT -40 -50 0 -25 0 25 50 100 75 125 -50 150 -25 0 25 50 100 75 125 150 AMBIENT TEMPERATURE IN °C AMBIENT TEMPERATURE IN °C Dwg. GH-051 Dwg. GH-052 OUTPUT SATURATION VOLTAGE SUPPLY CURRENT 5.0 300 I OUT = 20 mA B < B RP 4.0 SUPPLY CURRENT IN mA SATURATION VOLTAGE IN mV V CC = 4.5–24 V 200 100 0 -50 V CC = 24 V V CC = 12 V 3.0 VCC = 4.5 V 2.0 1.0 -25 0 25 50 75 100 125 150 Dwg. GH-029 www.allegromicro.com -50 -25 0 25 50 75 AMBIENT TEMPERATURE IN °C AMBIENT TEMPERATURE IN °C 100 125 150 Dwg. GH-053 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION SENSOR LOCATIONS APPLICATIONS INFORMATION (±0.005" [0.13 mm] die placement) Suffix “LT” ACTIVE AREA DEPTH 0.0305" 0.775 mm NOM www.allegromicro.com 0.090" 2.27 mm 0.050" 1.27 mm A 1 2 3 Dwg. MH-008-4C Suffix “U” ACTIVE AREA DEPTH 0.0165" 0.42 mm NOM Hall effect applications information is available in the “Hall-Effect IC Applications Guide” (AN 27701), which can be found in the latest issue of Allegro MicroSystems Electronic Data Book, AMS-702, or at OPERATION The output of these devices (pin 3) switches low when the magnetic field at the Hall sensor exceeds the operate point threshold (BOP). At this point, the output voltage is VOUT(SAT). When the magnetic field is reduced to below the release point (BRP) the device output goes high. Note especially that release can occur when the magnetic field is removed but to ensure release, a field reversal is required. The difference in the magnetic operate and release points is called the hysteresis (Bhys) of the device. This built-in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise. 0.092" 2.33 mm 0.077" 1.96 mm A BRANDED SURFACE 1 2 3 Dwg. MH-002-7C Suffix “UA” ACTIVE AREA DEPTH 0.0195" 0.50 mm NOM The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. 0.083" 2.10 mm 0.060" 1.51 mm A BRANDED SURFACE 1 2 3 Dwg. MH-011-4C 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 performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. 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 that may result from its use. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION PACKAGE DESIGNATOR ‘LT’ (SOT-89/TO-243AA) Dimensions in Inches (for reference only) 0.181 0.173 0.072 0.064 0.167 0.155 1 2 0.063 0.055 3 0.0173 0.0138 0.090 0.084 0.102 0.090 0.0189 0.0142 0.0221 0.0173 0.047 0.035 0.059 BSC 0.118 BSC Dwg. MA-009-3A in Dimensions in Millimeters (controlling dimensions) 4.60 4.40 1.83 1.62 4.25 3.94 1 2 3 2.60 2.29 2.29 2.13 0.56 0.44 1.50 3.00 BSC 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. www.allegromicro.com 0.44 0.35 0.48 0.36 1.20 0.89 BSC 1.60 1.40 Dwg. MA-009-3A mm 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION PACKAGE DESIGNATOR ‘U’ Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 0.183 0.178 4.65 4.52 0.063 0.059 1.60 1.50 0.181 0.176 4.60 4.47 45° 0.086 1 2 45° 0.018 3 2.18 1 2 0.46 3 MAX MAX 0.0173 0.0138 0.600 0.560 15.24 14.23 0.44 0.35 0.48 0.36 0.0189 0.0142 SEE NOTE SEE NOTE 1.27 2.54 0.050 0.100 Dwg. MH-003E in Devices in the ‘U’ package are LAST-TIME BUY Orders accepted only until April 18, 2002 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. MH-003E mm 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION PACKAGE DESIGNATOR ‘UA’ Dimensions in Millimeters (for reference only) Dimensions in Inches (controlling dimensions) 0.164 0.159 4.17 4.04 0.062 0.058 45° 1.57 1.47 45° 0.122 0.117 3.10 2.97 45° 0.085 1 2 3 45° 0.031 2.16 MAX 1 2 3 0.640 0.600 0.0173 0.0138 0.0189 0.0142 SEE NOTE 16.26 15.24 BSC 0.44 0.35 0.48 0.36 SEE NOTE 0.050 1.27 Dwg. MH-014E in BSC 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. www.allegromicro.com 0.79 MAX Dwg. MH-014E mm 3134 LOW-HYSTERESIS BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMP. OPERATION HALL-EFFECT SENSORS BIPOLAR HALL-EFFECT DIGITAL SWITCHES Partial Part Number UGx3132 UGx3133 UGx3134 A3260x Partial Part Number UGN3175 UGN3177 A3185x A3187x A3188x A3189x A3280x A3281x A3283x Operate Release Hysteresis Point (G) Point (G) (G) Over Oper. Voltage & Temp. Range <95 (Typ 32) <75 (Typ 32) -40 to 50 <30 (Typ 10) -180 to -15 -150 to -25 -300 to -140 -175 to -50 -200 to -80 -250 to -50 -40 to -5 -90 to -15 -180 to -100 >80 (Typ 180) >50 (Typ 180) 280 to 600 100 to 350 160 to 400 100 to 500 10 to 80 30 to 180 <400 (Typ 300) Replaces and Comments Packages >-95 (Typ -20) >30 (Typ 52) K, L, S LT, UA >-75 (Typ -20) >30 (Typ 52) K, L, S LT, UA -50 to 40 5 to 55 E, L LT, UA >-30 (Typ -10) Typ 20 E, L LH, LT, UA LATCHING HALL-EFFECT DIGITAL SWITCHES Operate Release Hysteresis Point (G) Point (G) (G) Over Oper. Voltage & Temp. Range 15 to 180 25 to 150 140 to 300 50 to 175 80 to 200 50 to 250 5 to 40 15 to 90 100 to 180 Oper. Temp. Oper. Temp. Packages S S E/L E/L E/L E/L E/L E/L E/L LT, UA LT, UA LT, UA LT, UA LT, UA LT, UA LH, LT, UA LH, LT, UA LH, LT, UA 3030, 3130, 3131 2 wire, chopper stabilized Replaces and Comments 3077, 3175, 3177 3075, 3076 chopper stabilized chopper stabilized chopper stabilized “PROTECTED” LATCHING HALL-EFFECT DIGITAL SWITCHES Partial Part Number Operate Release Hysteresis Point (G) Point (G) (G) Over Oper. Voltage & Temp. Range A3195x A3197x 40 to 200 40 to 200 -200 to -40 -200 to -40 >110 (Typ 220) >110 (Typ 230) Oper. Temp. Packages Comments E, L E, L U, LT U, LT active pulldown open-collector output Notes: 1) Typical data is at TA = +25°C and nominal operating voltage. 2) “x” = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K (UGS) = -40°C to +125°C, L (UGL) = -40°C to +150°C. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000