A3361LT

3361 ALLEGRO

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Technical content

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 surface- mount package, ‘xLT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; while suffix ‘xUA’ is a three- lead ultra-mini-SIP for through-hole mounting.

FEATURES

I Internal Current Regulator for 2-Wire Operation I Resistant to Physical Stress I Superior Temperature Stability I Operation From Unregulated Supply I Solid-State Reliability I Small Size 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 . 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Suffix Code 'LH' Pinning ABSOLUTE MAXIMUM RATINGS at TA=+25°C NC X SUPPLY GROUND Dwg. PH-003-5 NO (INTERNAL) CONNECTION Pinning is shown viewed from branded side.

3361 AND

Package Power Dissipation, P D . See Graph Operating Temperature Range, Storage Temperature Range, PRELIMINARY INFORMATION (subject to change without notice) August 28, 2000 Data Sheet 27621.50

3361 AND 3362

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-50002 FUNCTIONAL BLOCK DIAGRAM Copyright © 2000, Allegro MicroSystems, Inc. Dwg. FH-020-6 X DYNAMIC OFFSET CANCELLATION SUPPLY REG. SAMPLE & HOLD LOW-PASS FILTER TO ALL SUBCIRCUITS GROUND Pinning is shown viewed from branded side. X Dwg. PH-003-6 1SUPPLY GROUND NO (INTERNAL) CONNECTION NC X Dwg. PH-003-7A 1SUPPLY GROUND GROUND Suffix Code 'UA' Pinning (SIP) Suffix Code 'LT' Pinning (SOT-89/TO-243AA)

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES www.allegromicro.com 3 A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Operate Point B OP B > BOP, IGND = LOW – – 125 G Release Point B RP B < BRP, IGND = HIGH 40 – – G Hysteresis B hys BOP - BRP 5.0 – 30 G A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Operate Point B OP B > BOP, IGND = HIGH – – 125 G Release Point B RP B < BRP, IGND = LOW 40 – – G Hysteresis B hys BOP - BRP 5.0 – 30 G ELECTRICAL CHARACTERISTICS over operating temperature range. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V CC Operating 3.5 12 24 V Output Current I GND(L) Output Current Low 5.0 – 6.9 mA IGND(H) Output Current High 12 – 17 mA Chopping Frequency f C – 340 – kHz Output Settling Time t sd CL = 20 pF – – 50 µs Output Rise Time t r CL = 20 pF – 3.5 – µs Output Fall Time t f CL = 20 pF – 3.5 – µs Reverse Battery Current I CC VRCC = -16 V – – -15 mA NOTE: Typical Data is at T A = +25°C and VCC = 12 V and is for design information only.

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Worcester, Massachusetts 01615-0036 (508) 853-50004 OUTPUT CURRENT FLUX DENSITY Dwg. GH-007-3 RPB ICC IOUT + ICC OPB OUTPUT CHARACTERISTICS A3361x A3362x OUTPUT CURRENT FLUX DENSITY Dwg. GH-007-4 RPB OPB IOUT + ICC ICC

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES www.allegromicro.com 5 SENSOR LOCATIONS (±0.005” [0.13 mm] die placement) Package Designator “LH” Package Designators “UA” and "UA-TL" Although sensor location is accurate to three sigma for a particular design, product improvements may result in small changes to sensor location. 0.038" 0.96 mm 1 2 Dwg. MH-025 0.011" 0.28 mm NOM ACTIVE AREA DEPTH 0.059" 1.49 mm A 0.045" 1.14 mm 1 32 Dwg. MH-008-8 0.030" 0.76 mm NOM ACTIVE AREA DEPTH 0.088" 2.24 mm A 1 32 Dwg. MH-011-9A 0.018" 0.46 mm NOM BRANDED SURFACE ACTIVE AREA DEPTH 0.080" 2.04 mm 0.056" 1.44 mm A Package Designator “LT” 600 400 200 20 60 100 140 AMBIENT TEMPERATURE in °C ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS Dwg. GH-046-4 Suffix "–UA" RθJA = 206°C/W 40 80 120 180 700 500 300 100 160 Suffix "–LT" RθJA = 258°C/W Suffix "–LH" RθJA = 248°C/W Allegro

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Worcester, Massachusetts 01615-0036 (508) 853-50006 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. CRITERIA FOR DEVICE QUALIFICATION Qualification Test Test Method and Test Conditions Test Length Samples Comments Biased Humidity (HAST) T A = 130°C, RH = 85% 50 hrs 77 V CC = VOUT = 5 V High-Temperature JESD22-A108, 408 hrs 77 V CC = 24 V, Operating Life (HTOL) T A = 150°C, TJ = 165°CV OUT = 20 V Accelerated HTOL JESD22-A108, 504 hrs 77 V CC = 24 V, TA = 175°C, TJ = 190°CV OUT = 20 V Autoclave, Unbiased JESD22-A102, Condition C, 96 hrs 77 TA = 121°C, 15 psig High-Temperature MIL-STD-883, Method 1008, 1000 hrs 77 (Bake) Storage Life T A = 170°C Temperature Cycle MIL-STD-883, Method 1010, 500 cycles 77 -65°C to +150°C Latch-Up — Pre/Post 6 Reading Electro-Thermally — Pre/Post 6 Induced Gate Leakage Reading ESD, CDF-AEC-Q100-002 Pre/Post x per Test to failure, Human Body Model Reading test All leads > TBD Electrical Distributions Per Specification — 30

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES www.allegromicro.com 7 FUNCTIONAL DESCRIPTION Dwg. EH-012 REG SAMPLE & HOLD X HALL VOLTAGE B Dwg. AH-011-2 100 Ω Dwg. EH-011-2A 0.1 µF SUPPLY X 1 32 'UA' PACKAGE 0.95 V – 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 dependen- cies, 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-and- hold 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 (B OP). After turn on, the output will source current equal to the device operating current plus a current source (I GND(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 GND(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 (B hys) 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 chopper- stabilization technique. Extensive applications information on magnets and Hall- effect sensors is also available in the Allegro Electronic Data Book AMS-702 or Application Note 27701 or www.allegromicro.com

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Worcester, Massachusetts 01615-0036 (508) 853-50008 PACKAGE DESIGNATOR 'LH' (fits SC-74A solder-pad layout) NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest po int (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Where no tolerance is specified, dimension is nominal. Dwg. MA-011-3 mm 1.00 2.40 0.95 0.70 Dwg. MA-010-3B in 0.006 0.000 0.0079 0.0050 0.122 0.114 0.083 0.073 0.118 0.106 0.037 BSC 0.022 REF 0.020 0.012 0° TO 8°

0.020 MIN

0.043 0.035 0.049 0.035 Dwg. MA-011-3 in 0.039 0.094 0.037 0.028 Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions) Dwg. MA-010-3B mm 0.15 0.00 0.20 0.127 3.10 2.90 2.10 1.85 3.00 2.70 0.95 BSC 0.55 REF 0.50 0.30 0° TO 8°

0.25 MIN

1.10 0.90 1.25 0.90

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES www.allegromicro.com 9 Dwg. MA-009-3A in 1 23 0.072 0.064 0.167 0.155 0.059 BSC 0.0189 0.01420.047 0.035 0.102 0.090 0.063 0.055 0.0173 0.0138 0.090 0.0840.0221 0.0173 0.118 BSC 0.181 0.173 Dwg. MA-009-3A mm 1 23 4.60 4.40 1.83 1.62 4.25 3.94 1.50 BSC 0.48 0.361.20 0.89 2.60 2.29 1.60 1.40 0.44 0.35 2.29 2.130.56 0.44 3.00 BSC PACKAGE DESIGNATOR 'LT' (SOT-89/TO-243AA) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions) 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 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 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 0.028 TYP 0.031 TYP A

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Worcester, Massachusetts 01615-0036 (508) 853-500010 Surface-Mount Lead Form (order A336xEUA-TL) Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) PACKAGE DESIGNATOR 'UA' 0.095 ±0.005 0.020 MIN FLAT Dwg. MH-015 in 0.004 MAX 0.002 MAX 0°–8° 2.41 ±0.13 0.51 MIN FLAT Dwg. MH-015 mm 0.10 MAX 0.051 MAX 0°–8° Dwg. MH-014E mm 4.17 4.04 1.57 1.47 0.44 0.35 1.27 BSC 45° 16.26 15.24 0.48 0.36 2.16 MAX 45° 0.79123 3.10 2.97 SEE NOTE Dwg. MH-014E in 0.164 0.159 0.062 0.058 0.0173 0.0138 0.050 BSC 45° 0.640 0.600 0.0189 0.0142 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 po int (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.

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES www.allegromicro.com 11 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; 5,686,894; 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 responsi- bility for its use; nor for any infringements of patents or other rights of third parties that may result from its use.

2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES Worcester, Massachusetts 01615-0036 (508) 853-500012 HALL-EFFECT SENSORS Partial Part Avail. Oper. Characteristics at T A = +25°C Number Temp. B OP max B RP min B hys typ Features Notes HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys 3240 E/L +50 +5.0 10 chopper stabilized 1 3209 E ±60 ±5.0 7.7 400 µW, chopper stabilized 3210 E ±60 ±5.0 7.7 25 µW, chopper stabilized 3361 E +110 +55 5.0* 2-wire, chopper stabilized, inverted output 3362 E +110 +55 5.0* 2-wire, chopper stabilized

3161 E +160 +30 20 2-wire

3141 E/L +160 +10 55

3235 S +175 +25 15* output 1 2

-25 -175 15* output 2 2

5140 E +200 +50 55 300 mA power driver output 1

3142 E/L +230 +75 55

3143 E/L +340 +165 55

3144 E/L +350 +50 55

3122 E/L +400 +140 105

3123 E/L +440 +180 105

3121 E/L +450 +125 105

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: 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.