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3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
3260
Data Sheet 27631.50
2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
Suffix Code 'LH' Pinning The A3260-- Hall-effect bipolar switch is an extremely temperature-stable and stress-resistant sensor especially suited for operation over extended temperature ranges to +150C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The 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. A south pole of sufficient strength will turn the output OFF. 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. The first character of the part number suffix determines the device operating temperature range; suffix `E-' is for -40C to +85C and `L- ' is -40C to +150C. Three package styles provide a magnetically optimized package for most applications. Suffix `-LH' is a miniature lowprofile surface-mount package, `-LT' is a miniature SOT-89/TO243AA transistor package for surface-mount applications; while suffix `-UA' is a three-lead ultra-mini-SIP for through-hole mounting.
3
NC 1 2
X
GROUND NO (INTERNAL) CONNECTION
Dwg. PH-003-5
Pinning is shown viewed from branded side.
ADVANCE INFORMATION
(subject to change without notice) December 9, 1998
SUPPLY
FEATURES
ABSOLUTE MAXIMUM RATINGS
at TA=+25C Supply Voltage, VCC ........................... 27 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 Suffix `E-' .................. -40C to +85C Suffix `L-' ................ -40C to +150C Storage Temperature Range, TS .............................. -65C to +170C
s s s s s s s s
Internal Current Regulator for 2-Wire Operation Output Slew Rate Controlled Resistant to Physical Stress Superior Temperature Stability Operation From Unregulated Supply Reverse Battery Protection Solid-State Reliability Small Size
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., A3260ELH .
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
REG.
TO ALL SUBCIRCUITS
DYNAMIC OFFSET CANCELLATION
SAMPLE & HOLD
X
LOW-PASS FILTER
GROUND
Dwg. FH-020-4
Suffix Code 'UA' Pinning (SIP)
Suffix Code 'LT' Pinning (SOT-89/TO-243AA)
X
X
1 2
NC
1
2
3
3
GROUND
Dwg. PH-003-7
Dwg. PH-003-6
Pinning is shown viewed from branded side.
115 Northeast Cutoff, Box 15036 W Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1998, Allegro MicroSystems, Inc.
NO (INTERNAL) CONNECTION
GROUND
OUTPUT
SUPPLY
SUPPLY
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits Characteristic Supply Voltage Output Current Chopping Frequency Output Slew Rate Output Settling Time Reverse Battery Current Symbol VCC IGND(L) IGND(H) fC di/dt tsd ICC CL = 20 pF CL = 20 pF VRCC = -16 V Test Conditions Operating B > BOP B < BRP Min. 3.5 -4.0 -11 - 0.5 -- - Typ. 12 -6.5 -14.5 340 -- -- - Max. 24 -8.0 -18 - 2.0 20 -15 Units V mA mA kHz mA/s s mA
NOTES:1.. B OP = operate point (output turns OFF); BRP = release point (output turns ON). 2. Typical Data is at TA = +25C and V CC = 12 V and is for design information only.
MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits Characteristic Operate Point Release Point Hysteresis Symbol BOP BRP Bhys BOP - BRP Test Conditions Min. - -30 - Typ. 10 -10 20 Max. 30 - - Units G G G
NOTE -- Typical Data is at TA = +25C and V CC = 12 V and is for design information only.
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
This page intentionally left blank
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
SENSOR LOCATIONS
(0.005" [0.13 mm] die placement)
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
Package Designator "LT"
Dwg. MH-025
ACTIVE AREA DEPTH 0.030" 0.76 mm NOM
0.088" 2.24 mm 0.045" 1.14 mm
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
700
600
A
1 2 3
500
Suffix "UA" RJA = 206C/W
400 Suffix "LT" RJA = 258C/W 300
Dwg. MH-008-8
Package Designators "UA" and "UA-TL"
ACTIVE AREA DEPTH 0.018" 0.46 mm NOM
200
Suffix "LH" RJA = 439C/W
100
0.080" 2.04 mm
0 20 40 60
0.056" 1.44 mm
100 80 120 AMBIENT TEMPERATURE in C
140
160
180
Dwg. GH-046-2A
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.
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
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
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
FUNCTIONAL DESCRIPTION
Chopper-Stabilized Technique. 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. 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.
B
REG
X
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. The chopperstabilizing technique cancels the mismatching of the resistors by changing the direction of the current flowing through the Hall plate and Hall voltage measurement taps, while maintaining the Hall-voltage signal that is induced by the external magnetic flux. The signal is, then, captured by a sample-and-hold circuit. Operation. The output of these devices turns ON when a magnetic field (north pole) perpendicular to the Hall sensor exceeds the release point threshold (BRP). 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 increased (south pole) above the operate point (BOP), the output will source current equal to the Hall-effect sensor operating current with the current source turned OFF (IGND(L)). 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.
'UA' PACKAGE
+V
--
HALL VOLTAGE
+
DWG. FRD-903-2
+I
IOUT + ICC
OUTPUT CURRENT
BRP
BOP
ICC
0 -B 0 FLUX DENSITY +B
Dwg. GH-034-6
X
3
0.1 F
100 SUPPLY
1
2
Dwg. EH-011-2
SAMPLE & HOLD
Dwg. EH-012
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
PACKAGE DESIGNATOR 'LH'
(fits SC-74A solder-pad layout) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions)
0.122 0.114 0.018 0.012 0.083 0.073 0.022
REF 3 1 2
3.10 2.90
0.0079 0.0059 0.012 0.011 0 TO 8 0.037
BSC
0.45 0.30 2.10 1.85 0.55
REF 3 1 2
0.20 0.15 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-010-3 in
0.15 0.00
1.10 0.90 1.25 0.90
Dwg. MA-010-3 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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
PACKAGE DESIGNATOR 'LT'
(SOT-89/TO-243AA) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions)
0.173 0.181 0.064 0.072 0.155 0.167 0.090 0.102
0.055 0.063
0.014 0.017
3.94 4.25
4.40 4.60 1.62 1.83 2.29 2.60
1.40 1.60
0.35 0.44
1
2
3
0.084 0.090
1
2
3
2.13 2.29
0.035 0.047 0.059
BSC
0.014 0.019 0.017 0.022 0.118
BSC
Dwg. MA-009-3 in
0.89 1.20 1.50
BSC
0.36 0.48 0.44 0.56 3.00
BSC
Dwg. MA-009-3 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
ds 1, 2, 3, and A -- Standard SOT-89 Layout ds 1, 2, 3, and B -- Low-Stress Version ds 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.
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
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
0.015
16.26 15.24
0.38
SEE NOTE
0.016
SEE NOTE
0.41
0.050
BSC
Dwg. MH-014D in
1.27
BSC
Dwg. MH-014D mm
Surface-Mount Lead Form (Suffix '-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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
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.
3260 2-WIRE, CHOPPER-STABILIZED, PRECISION HALL-EFFECT BIPOLAR SWITCH
HALL-EFFECT SENSORS SELECTION GUIDE
Partial Part Number 3046 3054 3056 3058 3059 3060 3121 3122 3123 3132 3133 3134 3141 3142 3143 3144 3161 3175 3177 3185 3187 3188 3189 3195 3197 3210 3235 3275 3421 3422 3503 3515 3516 3517 3518 3625 3626 5140 Avail. Oper. Temp. E/L K/S E/L E/L K/S K/S E/L E/L E/L K/L/S K/L/S E/L E/L E/L E/L E/L E S S E/K/L/S E/K/L/S E/K/L/S E/K/L/S E/L L E S S E/L E/L S E/L E/L L/S L/S S S E Operate Limits Over Temp. BOP max BRP min Bhys min +200 -200 +300 +5 +225 -225 +300 -300 +100 -100 +35 -35 +500 +80 +430 +120 +470 +160 +95 -95 +75 -75 +50 -50 +175 +10 +245 +60 +355 +150 +450 +25 +160 +30 +180 -180 +150 -150 +300 -300 +175 -175 +200 -200 +250 -250 +200 -200 +200 -200 70 5 +200 +15 -15 -200 +250 -250 +300 -300 +85 -85 Typ. 1.3 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G +150 -150 +150 -150 +240 +25 15 5.0 15 150 20 10 60 70 70 30 30 5.0 20 30 30 20 5.0 80 50 280 100 160 100 110 110 7.7* 15 15 100 240 10 - - - - - 200* 200* 20 Function Notes Gear-Tooth Sensor Unipolar Multiplex 1 Gear-Tooth Sensor Gear-Tooth Sensor AC Gear-Tooth Sensor AC Gear-Tooth Sensor Unipolar Switch Unipolar Switch Unipolar Switch Bipolar Switch Bipolar Switch Bipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch 2-Wire Unipolar Switch Latch Latch Latch Latch Latch Latch Latch 2, 3 Latch 3 Chopper-Stabilized Switch Unipolar Switch 4 Unipolar Switch Latch 5 Direction Detection Direction Detection Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor 900 mA Latch 3, 5, 6 400 mA Latch 3, 5, 6 300 mA Unipolar Switch 3, 6
Operating Temperature Ranges: C = 0C to +70C, S = -20C to +85C, E = -40C to +85C, K = -40C to +125C, L = -40C to +150C Notes 1.Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition. 2.Active pull down. 3.Protected. 4.Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 5.Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. 6.Power driver output. * Typical. Latches willnot 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

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