Data Sheet 27621.50 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Suffix Code 'LH' Pinning 3 X NC NO (INTERNAL) CONNECTION Dwg. PH-003-5 2 GROUND SUPPLY 1 Pinning is shown viewed from branded side. The A3361x and A3362x Hall-effect switches are extremely temperature-stable and stress-resistant sensors. Superior performance over temperature is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The two devices differ only in output polarity; the A3361x output current goes low in the presence of a south pole of sufficient strength; the A3362x output current goes high. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a constant-current open-collector output. An on-board regulator permits operation with supply voltages of 3.5 to 24 volts. Noise radiation is limited by control of the output current slew rate. Three package styles provide a magnetically optimized package for most applications. Suffix ‘xLH’ is a miniature low-profile surfacemount package, ‘xLT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; while suffix ‘xUA’ is a threelead ultra-mini-SIP for through-hole mounting. PRELIMINARY INFORMATION (subject to change without notice) August 28, 2000 FEATURES ABSOLUTE MAXIMUM RATINGS at TA=+25°C ■ Internal Current Regulator for 2-Wire Operation ■ Resistant to Physical Stress Supply Voltage, VCC ........................ 26.5 V ■ Superior Temperature Stability Reverse Battery Voltage, VRCC .......... -16 V ■ Operation From Unregulated Supply Magnetic Flux Density, B ........... Unlimited ■ Solid-State Reliability Package Power Dissipation, PD . See Graph ■ Small Size Junction Temperature, TJ ............... +170°C Operating Temperature Range, TA ............................... -40°C to +85°C Storage Temperature Range, TS .............................. -65°C to +170°C Always order by complete part number: the prefix 'A' + the basic four-digit part number + a suffix to indicate operating temperature range (E) + a two-letter suffix to indicate package style, e.g., A3361ELH . 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES FUNCTIONAL BLOCK DIAGRAM LOW-PASS FILTER TO ALL SUBCIRCUITS SAMPLE & HOLD X REG. DYNAMIC OFFSET CANCELLATION SUPPLY GROUND Dwg. FH-020-6 Suffix Code 'UA' Pinning (SIP) Suffix Code 'LT' Pinning (SOT-89/TO-243AA) X X GROUND GROUND Dwg. PH-003-7A 1 2 Dwg. PH-003-6 Pinning is shown viewed from branded side. 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc. 3 NO (INTERNAL) CONNECTION 3 GROUND 2 SUPPLY 1 SUPPLY NC 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES ELECTRICAL CHARACTERISTICS over operating temperature range. Limits Characteristic Symbol Supply Voltage VCC Output Current Test Conditions Min. Typ. Max. Units Operating 3.5 12 24 V IGND(L) Output Current Low 5.0 – 6.9 mA IGND(H) Output Current High 12 – 17 mA – 340 – kHz Chopping Frequency fC Output Settling Time tsd CL = 20 pF – – 50 µs Output Rise Time tr CL = 20 pF – 3.5 – µs Output Fall Time tf CL = 20 pF – 3.5 – µs VRCC = -16 V – – -15 mA Reverse Battery Current ICC NOTE: Typical Data is at TA = +25°C and VCC = 12 V and is for design information only. A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges. Limits Characteristic Symbol Operate Point BOP Release Point Hysteresis Test Conditions Min. Typ. Max. Units B > BOP, IGND = LOW – – 125 G BRP B < BRP, IGND = HIGH 40 – – G Bhys BOP - BRP 5.0 – 30 G A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges. Limits Characteristic Symbol Operate Point BOP Release Point Hysteresis www.allegromicro.com Test Conditions Min. Typ. Max. Units B > BOP, IGND = HIGH – – 125 G BRP B < BRP, IGND = LOW 40 – – G Bhys BOP - BRP 5.0 – 30 G 3 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES OUTPUT CHARACTERISTICS A3361x A3362x +I +I IOUT + ICC OUTPUT CURRENT OUTPUT CURRENT IOUT + ICC B RP B RP B OP ICC ICC 0 0 0 +B FLUX DENSITY 4 B OP Dwg. GH-007-4 0 +B FLUX DENSITY 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. GH-007-3 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES SENSOR LOCATIONS Package Designator “LH” ACTIVE AREA DEPTH 0.011" 0.28 mm NOM 0.059" 1.49 mm 3 0.038" 0.96 mm A 1 2 Dwg. MH-025 Package Designator “LT” ACTIVE AREA DEPTH 0.030" 0.76 mm NOM ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS 700 (±0.005” [0.13 mm] die placement) 600 Suffix "–UA" RθJA = 206°C/W 500 Suffix "–LH" RθJA = 248°C/W 400 Suffix "–LT" RθJA = 258°C/W 300 200 100 0 20 40 60 80 120 100 AMBIENT TEMPERATURE in °C 140 160 180 Dwg. GH-046-4 0.088" 2.24 mm 0.045" 1.14 mm A 1 2 3 Dwg. MH-008-8 Package Designators “UA” and "UA-TL" ACTIVE AREA DEPTH 0.018" 0.46 mm NOM 0.080" 2.04 mm 0.056" 1.44 mm Allegro A BRANDED SURFACE 1 2 3 Dwg. MH-011-9A Although sensor location is accurate to three sigma for a particular design, product improvements may result in small changes to sensor location. www.allegromicro.com 5 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES CRITERIA FOR DEVICE QUALIFICATION All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To become qualified, except for the destructive ESD tests, no failures are permitted. 6 Qualification Test Test Method and Test Conditions Test Length Samples Biased Humidity (HAST) TA = 130°C, RH = 85% 50 hrs 77 VCC = VOUT = 5 V High-Temperature Operating Life (HTOL) JESD22-A108, TA = 150°C, TJ = 165°C 408 hrs 77 VCC = 24 V, VOUT = 20 V Accelerated HTOL JESD22-A108, TA = 175°C, TJ = 190°C 504 hrs 77 VCC = 24 V, VOUT = 20 V Autoclave, Unbiased JESD22-A102, Condition C, TA = 121°C, 15 psig 96 hrs 77 High-Temperature (Bake) Storage Life MIL-STD-883, Method 1008, TA = 170°C 1000 hrs 77 Temperature Cycle MIL-STD-883, Method 1010, -65°C to +150°C 500 cycles 77 Latch-Up — Pre/Post Reading 6 Electro-Thermally Induced Gate Leakage — Pre/Post Reading 6 ESD, Human Body Model CDF-AEC-Q100-002 Pre/Post Reading x per test Electrical Distributions Per Specification — 30 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Comments Test to failure, All leads > TBD 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES FUNCTIONAL DESCRIPTION Chopper-Stabilized Technique. The Hall element can be considered as a resistor array similar to a Wheatstone bridge. A large portion of the offset is a result of the mismatching of these resistors. These devices use a proprietary dynamic offset cancellation technique, with an internal high-frequency clock to reduce the residual offset voltage of the Hall element that is normally caused by device overmolding, temperature dependencies, and thermal stress. The chopper-stabilizing technique cancels the mismatching of the resistor circuit by changing the direction of the current flowing through the Hall plate using CMOS switches and Hall voltage measurement taps, while maintaing the Hall-voltage signal that is induced by the external magnetic flux. The signal is then captured by a sample-andhold circuit and further processed using low-offset bipolar circuitry. This technique produces devices that have an extremely stable quiescent Hall output voltage, are immune to thermal stress, and have precise recoverability after temperature cycling. This technique will also slightly degrade the device output repeatability. A relatively high sampling frequency is used in order that faster signals can be processed. More detailed descriptions of the circuit operation can be found in: Technical Paper STP 97-10, Monolithic Magnetic Hall Sensor Using Dynamic Quadrature Offset Cancellation and Technical Paper STP 99-1, Chopper-Stabilized Amplifiers With A Track-and-Hold Signal Demodulator. Operation. As shown in the output characteristic graphs, the output of the A3362 turns on when a magnetic field (south pole) perpendicular to the Hall sensor is increased above the operate point threshold (BOP). After turn on, the output will source current equal to the device operating current plus a current source (IGND(H)). When the magnetic field is decreased below the release point (BRP), the output turns off and will source current equal only to the Hall-effect sensor operating current (IGND(L)). The A3361 output is inverted and the device turns off at BOP and on at BRP. The difference in the magnetic operate and release points is the hysteresis (Bhys) of the device. The hysteresis allows clean switching of the output even in the presence of external mechanical vibration or electrical noise. Applications. It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopperstabilization technique. Extensive applications information on magnets and Halleffect sensors is also available in the Allegro Electronic Data Book AMS-702 or Application Note 27701 or www.allegromicro.com SAMPLE & HOLD REG B +V — X HALL VOLTAGE + Dwg. AH-011-2 Dwg. EH-012 'UA' PACKAGE – + 3 2 X 0.95 V 0.1 µF 100 Ω 1 SUPPLY Dwg. EH-011-2A www.allegromicro.com 7 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES PACKAGE DESIGNATOR 'LH' (fits SC-74A solder-pad layout) Dimensions in Inches (for reference only) 0.122 0.114 0.020 0.012 0.083 0.073 3.10 2.90 0.0079 0.0050 3 1 Dimensions in Millimeters (controlling dimensions) 0.118 0.106 2 0.020 MIN 0.022 2.10 1.85 0.20 0.127 3 1 3.00 2.70 2 0° TO 8° REF 0.037 0.95 BSC BSC 0.006 0.000 0.25 MIN 0.55 0° TO 8° REF 0.50 0.30 0.043 0.035 0.049 0.035 1.10 0.90 1.25 0.90 0.15 0.00 Dwg. MA-010-3B mm Dwg. MA-010-3B in 0.028 0.70 3 3 0.039 1.00 0.094 1 NOTES: 1. 2. 3. 4. 8 2 2.40 1 2 0.037 0.95 Dwg. MA-011-3 in Dwg. MA-011-3 mm Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). Exact body and lead configuration at vendor’s option within limits shown. Height does not include mold gate flash. Where no tolerance is specified, dimension is nominal. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES 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 2 1 Dimensions in Millimeters (controlling dimensions) 0.063 0.055 3 0.102 0.090 4.60 4.40 1.83 1.62 0.0173 0.0138 0.090 0.084 4.25 3.94 0.0189 0.0142 0.0221 0.0173 0.047 0.035 0.059 BSC 2 1 3.00 BSC Dwg. MA-009-3A in Dwg. MA-009-3A mm 2.5 2.0 B 0.031 A 0.102 0.8 2.6 A 4.6 0.181 1 2 2.29 2.13 0.56 0.44 1.50 0.098 0.079 B 0.44 0.35 0.48 0.36 BSC BSC 2.60 2.29 3 1.20 0.89 0.118 1.60 1.40 3 0.047 1 2 3 1.2 0.028 0.031 0.7 0.8 TYP TYP TYP TYP ads 1, 2, 3, and A — Standard SOT-89 Layout ads 1, 2, 3, and B — Low-Stress Version ads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning 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 Dwg. MA-012-3 mm NOTE: Exact body and lead configuration at vendor’s option within limits shown. www.allegromicro.com 9 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES 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 0.0173 0.0138 0.0189 0.0142 SEE NOTE 0.44 0.35 16.26 15.24 0.48 0.36 SEE NOTE 0.050 BSC 1.27 BSC Dwg. MH-014E in Dwg. MH-014E mm Surface-Mount Lead Form (order A336xEUA-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 Dwg. MH-015 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. 10 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES 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. 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. www.allegromicro.com 11 3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES HALL-EFFECT SENSORS Partial Part Number Avail. Oper. Characteristics at TA = +25°C Temp. BOP max BRP min Bhys typ Features HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys 3240 3209 3210 3361 3362 3161 3141 3235 E/L E E E E E E/L S 5140 3142 3143 3144 3122 3123 3121 E E/L E/L E/L E/L E/L E/L +50 ±60 ±60 +110 +110 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +5.0 ±5.0 ±5.0 +55 +55 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 10 7.7 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 Notes chopper stabilized 1 400 µW, chopper stabilized 25 µW, chopper stabilized 2-wire, chopper stabilized, inverted output 2-wire, chopper stabilized 2-wire output 1 output 2 300 mA power driver output 2 2 1 † HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar switch, 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 power driver output 1, 3 3626 S +150 -150 200 400 mA power driver output 1, 3 3195 E/L +160 -160 220 active pulldown 1 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* 3 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. Outputs may be tied together for omnipolar operation. 3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. * Minimum. ‡ Maximum † 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. 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000