Data Sheet 27609.2A 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION X These Hall-effect latches are extremely temperature-stable and stressresistant sensors 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 symmetry 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. The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter. The four basic devices (3185, 3187, 3188, and 3189) are identical except for magnetic switch points. 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 Each 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 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 for -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT89/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-miniSIP. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ Symmetrical Switch Points 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: the prefix ‘A’ + the basic four-digit part number + a suffix to indicate operating temperature range + a suffix to indicate package style, e.g., A3185ELT . 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE 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 5.0 µA Supply Current ICC B < BRP (Output OFF) — 4.75 8.0 mA B > BOP (Output ON) — 5.7 — 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 in gauss over operating supply voltage range. Part Numbers* A3185 A3187 A3188 A3189 Characteristic Min. Max. Min. Max. Min. Max. Min. Max. BOP at TA = 25°C 170 270 50 150 100 180 50 230 140 300 50 175 80 200 50 250 -270 -170 -150 -50 -180 -100 -230 -50 -300 -140 -175 -50 -200 -80 -250 -50 340 540 100 300 200 360 100 460 280 600 100 350 160 400 100 500 over operating temp. range BRP at TA = 25°C over operating temp. range Bhys at TA = 25°C over operating temp. range 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). *Complete part number includes a suffix to identify operating temperature range (E or L) and package type ( LT, U, or UA). 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1995, 1999, Allegro MicroSystems, Inc. 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION TYPICAL OPERATING CHARACTERISTICS A3185* SWITCH POINTS A3187* SWITCH POINTS 150 300 200 100 OPERATE POINT SWITCH POINT IN GAUSS SWITCH POINT IN GAUSS OPERATE POINT 100 V CC = 12 V 0 -100 50 V CC = 12 V 0 -50 RELEASE POINT RELEASE POINT -100 -200 -150 -50 -300 -50 0 -25 50 25 100 75 150 125 AMBIENT TEMPERATURE IN °C -25 0 25 75 50 7.0 I OUT = 20 mA VCC = 12 V SUPPLY CURRENT IN mA V CC = 4.5–24 V 200 100 6.0 B ≥ B OP 5.0 B ≤ B RP 0 -50 -25 0 25 50 100 75 125 4.0 -50 150 -25 0 AMBIENT TEMPERATURE IN °C 25 50 125 100 75 AMBIENT TEMPERATURE IN °C 150 Dwg. GH-028 Dwg. GH-029 OPERATE POINT SUPPLY CURRENT 10 CHANGE IN OPERATE POINT IN GAUSS 20 8.0 SUPPLY CURRENT IN mA 150 Dwg. GH-027 SUPPLY CURRENT OUTPUT SATURATION VOLTAGE 300 SATURATION VOLTAGE IN mV 125 100 AMBIENT TEMPERATURE IN °C Dwg. GH-026 B ≥ B OP 6.0 B ≤ B RP 4.0 T A = +25°C 2.0 0 15 T A = +25°C 10 5.0 0 -5.0 0 5 10 15 SUPPLY VOLTAGE IN VOLTS 20 25 Dwg. GH-030 0 5 10 15 SUPPLY VOLTAGE IN VOLTS 20 25 Dwg. GH-037 * Complete part number includes a suffix denoting operating temperature range (E or L) and package type (LT, U, or UA). 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION SENSOR LOCATIONS (±0.005” [0.13 mm] die placement) Package Designators “LT” ACTIVE AREA DEPTH 0.030" 0.76 mm NOM 0.090" 2.27 mm 0.050" 1.27 mm 2 In operation, the output transistor is OFF until the strength of the magnetic field perpendicular to the surface of the chip exceeds the threshold or operate point (BOP). When the field strength exceeds BOP, the output transistor switches ON and is capable of sinking 25 mA of current. The output transistor switches OFF when magnetic field reversal results in a magnetic flux density below the OFF threshold (BRP). This is illustrated in the transfer characteristics graph (A3187* shown). Note that the device latches; that is, a south pole of sufficient strength will turn the device ON. Removal of the south pole will leave the device ON. The presence of a north pole of sufficient strength is required to turn the device OFF. A 1 OPERATION 3 Dwg. MH-008-4B Package Designator “U” 0.092" 2.33 mm 0.077" 1.96 mm OUTPUT VOLTAGE IN VOLTS ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 30 V MAX VBB B RP B OP A BRANDED SURFACE VOUT(SAT) 1 2 0 3 -B 0 FLUX DENSITY +B Dwg. GH-034-4 Dwg. MH-002-7B Package Designators “UA” and "UA-TL" ACTIVE AREA DEPTH 0.018" 0.46 mm NOM The simplest form of magnet that will operate these devices is a ring magnet, as shown below. Other methods of operation are possible. 0.083" 2.10 mm 0.060" 1.51 mm A BRANDED SURFACE 1 2 3 Dwg. A-11,899 Dwg. MH-011-4B Although sensor location is accurate to three sigma for a particular design, product improvements may result in small changes to sensor location. APPLICATIONS INFORMATION Extensive applications information on magnets and Hall-effect sensors is also available in the Allegro Integrated and Discrete Semiconductors Data Book or Application Note 27701. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE 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 MAX 1 2 0.46 3 MAX 0.600 0.560 0.015 15.24 14.23 0.38 0.016 0.41 SEE NOTE SEE NOTE 0.050 0.100 1.27 2.54 Dwg. MH-003D in 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. Where no tolerance is specified, dimension is nominal. 6. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable, contact sales office before ordering. 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE 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 0.79 MAX 0.640 0.600 16.26 15.24 0.015 SEE NOTE 0.38 SEE NOTE 0.016 0.41 0.050 BSC 1.27 BSC Dwg. MH-014D in Dwg. MH-014D mm Surface-Mount Lead Form (Suffix ‘-TL’) 2.41 0.095 ±0.13 ±0.005 0.002 0.051 MAX MAX 0.004 0°–8° MAX 0.10 0.020 MIN FLAT MAX Dwg. MH-015 in 0°–8° 0.51 MIN FLAT 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-015 mm 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION PACKAGE DESIGNATOR ‘LT’ (SOT-89/TO-243AA) Dimensions in Inches (for reference only) 0.173 0.181 0.064 0.072 0.155 0.167 1 2 0.055 0.063 3 0.090 0.102 0.014 0.017 0.084 0.090 0.014 0.019 0.017 0.022 0.035 0.047 0.059 BSC 0.118 BSC Dwg. MA-009-3 in Dimensions in Millimeters (controlling dimensions) 4.40 4.60 1.62 1.83 3.94 4.25 1 2 1.40 1.60 3 2.29 2.60 0.35 0.44 2.13 2.29 0.36 0.48 0.89 1.20 0.44 0.56 1.50 BSC 3.00 BSC Dwg. MA-009-3 mm NOTE: Exact body and lead configuration at vendor’s option within limits shown. 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. 3185 THRU 3189 HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION HALL-EFFECT SENSORS SELECTION GUIDE Partial Part Number Avail. Oper. Characteristics at TA = +25°C Temp. BOP(max) BRP(min) Bhys(typ) Features HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys 3240 3210 3361 3362 3161 3141 3235 E/L E E E E E/L S 5140 3142 3143 3144 3122 3123 3121 3150 E E/L E/L E/L E/L E/L E/L J +50 ±70 +120 +120 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +40 to +850 +5.0 ±5.0 +50 +50 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 – 10 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 20 Notes chopper stabilized micropower, chopper stabilized 2-wire, chopper stabilized 2-wire, chopper stabilized 2-wire 1 output 1 output 2 300 mA output 2 2 1, 3 programmable, chopper stabilized 1 † HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar, chopper stabilized 3280 E/L +40 -40 45 chopper stabilized 3134 E/L +50 -50 27 bipolar switch 3133 K/L/S +75 -75 52 bipolar switch 3281 E/L +90 -90 100 chopper stabilized 3132 K/L/S +95 -95 52 bipolar switch 3187 E/L +150 -150 100* 3177 S +150 -150 200 3625 S +150 -150 200 900 mA outputs 1, 3, 5 3626 S +150 -150 200 400 mA outputs 1, 3, 5 3195 E/L +160 -160 220 1, 4 3197 L +160 -160 230 1 3175 S +170 -170 200 3188 E/L +180 -180 200* 3283 E/L +180 -180 300 chopper stabilized 3189 E/L +230 -230 100* 3275 S +250 -250 100* 5 3185 E/L +270 -270 340* Operating Temperature Ranges: S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C Notes 1. Protected. 2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 3. Power driver output. 4. Active pull down. 5. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. * Minimum. † 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