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3361 AND 3362
Suffix Code 'LH' Pinning
2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
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.
Data Sheet 27621.50
3
NC 1 2
X
GROUND NO (INTERNAL) CONNECTION
Dwg. PH-003-5
Pinning is shown viewed from branded side.
PRELIMINARY INFORMATION
(subject to change without notice) August 28, 2000
SUPPLY
FEATURES
ABSOLUTE MAXIMUM RATINGS
at TA=+25C Supply Voltage, VCC ........................ 26.5 V Reverse Battery Voltage, VRCC .......... -16 V Magnetic Flux Density, B ........... Unlimited Package Power Dissipation, PD . See Graph Junction Temperature, TJ ............... +170C Operating Temperature Range, TA ............................... -40C to +85C Storage Temperature Range, TS .............................. -65C to +170C 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 .
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
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
REG.
TO ALL SUBCIRCUITS
DYNAMIC OFFSET CANCELLATION
SAMPLE & HOLD
X
LOW-PASS FILTER
GROUND
Dwg. FH-020-6
Suffix Code 'UA' Pinning (SIP)
Suffix Code 'LT' Pinning (SOT-89/TO-243AA)
X
NC
X
1
2
3
1
2
3
GROUND
GROUND
Dwg. PH-003-7A
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 (c) 2000, Allegro MicroSystems, Inc.
NO (INTERNAL) CONNECTION
GROUND
SUPPLY
SUPPLY
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits Characteristic Supply Voltage Output Current Symbol VCC IGND(L) IGND(H) Chopping Frequency Output Settling Time Output Rise Time Output Fall Time Reverse Battery Current fC tsd tr tf ICC CL = 20 pF CL = 20 pF CL = 20 pF VRCC = -16 V Test Conditions Operating Output Current Low Output Current High Min. 3.5 5.0 12 - - - - - Typ. 12 - - 340 - 3.5 3.5 - Max. 24 6.9 17 - 50 - - -15 Units V mA mA kHz s s s mA
NOTE: Typical Data is at TA = +25C and VCC = 12 V and is for design information only.
A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits Characteristic Operate Point Release Point Hysteresis Symbol BOP BRP Bhys Test Conditions B > BOP, IGND = LOW B < BRP, IGND = HIGH BOP - BRP Min. - 40 5.0 Typ. - - - Max. 125 - 30 Units G G G
A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits Characteristic Operate Point Release Point Hysteresis Symbol BOP BRP Bhys Test Conditions B > BOP, IGND = HIGH B < BRP, IGND = LOW BOP - BRP Min. - 40 5.0 Typ. - - - Max. 125 - 30 Units G G G
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3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
OUTPUT CHARACTERISTICS A3361x
+I
A3362x
+I
IOUT + ICC
IOUT + ICC
OUTPUT CURRENT
OUTPUT CURRENT
B RP
B OP
B RP
B OP
ICC
ICC
0 0 FLUX DENSITY +B
Dwg. GH-007-4
0 0 FLUX DENSITY +B
Dwg. GH-007-3
4
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
SENSOR LOCATIONS
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
700
(0.005" [0.13 mm] die placement)
600
Package Designator "LH"
ACTIVE AREA DEPTH 0.011" 0.28 mm NOM 0.059" 1.49 mm 3 0.038" 0.96 mm
Suffix "-UA" RJA = 206C/W
500
Suffix "-LH" RJA = 248C/W
400
Suffix "-LT" RJA = 258C/W
300
A
1 2
Dwg. MH-025
200
100
Package Designator "LT"
ACTIVE AREA DEPTH 0.030" 0.76 mm NOM
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.
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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. Qualification Test Biased Humidity (HAST) High-Temperature Operating Life (HTOL) Accelerated HTOL Test Method and Test Conditions TA = 130C, RH = 85% JESD22-A108, TA = 150C, TJ = 165C JESD22-A108, TA = 175C, TJ = 190C JESD22-A102, Condition C, TA = 121C, 15 psig MIL-STD-883, Method 1008, TA = 170C MIL-STD-883, Method 1010, -65C to +150C -- Test Length 50 hrs 408 hrs Samples 77 77 Comments VCC = VOUT = 5 V VCC = 24 V, VOUT = 20 V VCC = 24 V, VOUT = 20 V
504 hrs
77
Autoclave, Unbiased
96 hrs
77
High-Temperature (Bake) Storage Life Temperature Cycle
1000 hrs
77
500 cycles
77
Latch-Up
Pre/Post Reading Pre/Post Reading Pre/Post Reading --
6
Electro-Thermally Induced Gate Leakage ESD, Human Body Model Electrical Distributions
--
6
CDF-AEC-Q100-002
x per test 30
Test to failure, All leads > TBD
Per Specification
6
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
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.
B +V
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
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REG
--
X
HALL VOLTAGE
+
Dwg. AH-011-2
'UA' PACKAGE
0.95 V
3
- +
X
0.1 F
100 SUPPLY
1
2
Dwg. EH-011-2A
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SAMPLE & HOLD
Dwg. EH-012
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) Dimensions in Millimeters (controlling dimensions)
0.122 0.114 0.020 0.012 0.083 0.073 0.022
REF 3 1 2
3.10 2.90
0.0079 0.0050 0.118 0.106 0 TO 8 0.037
BSC
0.50 0.30 2.10 1.85 0.55
REF 3 1 2
0.20 0.127 3.00 2.70 0 TO 8 0.95
BSC
0.020 MIN
0.25 MIN
0.006 0.000
0.043 0.035 0.049 0.035
Dwg. MA-010-3B in
0.15 0.00
1.10 0.90 1.25 0.90
Dwg. MA-010-3B mm
0.028
3
0.70
3
0.039 0.094
1 2
1.00 2.40
1 2
0.037
Dwg. MA-011-3 in
0.95
Dwg. MA-011-3 mm
NOTES: 1. 2. 3. 4.
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.
8
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) Dimensions in Millimeters (controlling dimensions)
0.181 0.173 0.072 0.064 0.167 0.155 0.102 0.090
0.063 0.055
0.0173 0.0138
4.60 4.40 1.83 1.62 4.25 3.94 2.60 2.29
1.60 1.40
0.44 0.35
1
2
3
0.090 0.084
1
2
3
2.29 2.13
0.047 0.035 0.059
BSC
0.0189 0.0142 0.0221 0.0173 0.118
BSC
Dwg. MA-009-3A in
1.20 0.89 1.50
BSC
0.48 0.36 0.56 0.44 3.00
BSC
Dwg. MA-009-3A mm
0.098 0.079 B A 0.031 0.102 0.181 3 0.047 0.031
TYP
2.5 2.0 B A 0.8 2.6 4.6 1.2 0.8
TYP
1 0.028
TYP
2
1 0.7
TYP
2
3
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
Dwg. MA-012-3 in
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 mm
NOTE: Exact body and lead configuration at vendor's option within limits shown.
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9
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR 'UA'
Dimensions in Inches (controlling dimensions)
0.164 0.159
Dimensions in Millimeters (for reference only)
4.17 4.04
45
0.062 0.058
45
1.57 1.47
0.122 0.117 45 0.031
3.10 2.97 45 0.79
0.085
MAX
1
2
3
2.16
MAX
1
2
3
0.640 0.600
0.0173 0.0138
16.26 15.24
0.44 0.35
SEE NOTE
0.0189 0.0142
SEE NOTE
0.48 0.36
0.050
BSC
Dwg. MH-014E in
1.27
BSC
Dwg. MH-014E mm
Surface-Mount Lead Form (order A336xEUA-TL)
0.095
0.005
2.41
0.13
0.002
MAX
0.051
MAX
0.004 0-8
MAX
0.020
MIN FLAT
Dwg. MH-015 in
0.10
MAX
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.
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11
3361 AND 3362 2-WIRE, CHOPPER-STABILIZED, HALL-EFFECT SWITCHES
HALL-EFFECT SENSORS
Partial Part Number 3240 3209 3210 3361 3362 3161 3141 3235 5140 3142 3143 3144 3122 3123 3121 Avail. Oper. Characteristics at TA = +25C Temp. BOP max BRP min Bhys typ Features HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys E/L E E E E E E/L S 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 W, chopper stabilized 25 W, 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 = -20C to +85C, E = -40C to +85C, J = -40C to +115C, K = -40C to +125C, L = -40C to +150C 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

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