查询A3280ELHLT供应商
3280, 3281,
Data Sheet
27609.20c
Suffix '–LT' & '–UA' Pinning
(SOT89/TO-243AA & ultra-mini SIP)
X
PTCT
V
CC
1
SUPPLY
32
GROUND
Dwg. PH-003-2
OUTPUT
AND
3283
CHOPPER-STABILIZED, PRECISION
HALL-EF FECT LATCHES
The A3280--, A3281--, and A3283-- Hall-effect latches are ex treme ly
temperature-stable and stress-resistant sensors especially suited for operation over extended temperature ranges to +150°C. Superior high-temperature per for mance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress. The three
devices are iden ti cal except for mag net ic switch points.
Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper sta bi li za tion,
Schmitt trigger, and a short-circuit protected open-collector output to
sink up to 25 mA. A south pole of sufficient strength will turn the output
on. A north pole is necessary to turn the output off. An on-board regulator permits operation with supply voltages of 4.2 to 24 volts.
Three package styles provide a magnetically op ti mized pack age for
most ap pli ca tions. Package type LH is a modified SOT23W surfacemount package, LT is a miniature SOT89/TO-243AA transistor package
for surface-mount applications; while UA is a three-lead ultra-mini-SIP
for through-hole mounting. Each package type is also available in a lead
(Pb) free version (suffix, –T) , with a 100% matte tin plated leadframe.
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC .......................... 26.5 V
Reverse Battery Voltage, V
Magnetic Flux Density, B............ Unlimited
Output Off Voltage, V
Continuous Output Current,
I
Reverse Output Current, I
Package Power Dissipation, P
Junction Temperature, T
Operating Temperature Range, T
Range ‘L’.................... -40°C to +150°C
Storage Temperature Range,
T
*Internal current limiting is intended to protect
the device from output short circuits.
......................................... 25 mA*
OUT
Range ‘E’ ..................... -40°C to +85°C
.............................. -65°C to +170°C
S
OUT
.......... -30 V
RCC
.................... 26 V
......... -50 mA
OUT
See Graph
D
................ +170°C
J
A
FEATURES
■ Symmetrical Switch Points
■ Resistant to Physical Stress
■ Superior Temperature Stability
■ Output Short-Circuit Protection
■ Operation From Unregulated Supply
■ Reverse Battery Protection
■ Sol id-State Reliability
■ Small Size
Product Selection Guide
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
Part Number Pb-free Packing* Mounting
A3280ELHLT
A3280ELHLT-T–Yes
A3280ELT
A3280ELT-T
A3280ELTTR
A3280ELTTR-T–Yes
A3280EUA
A3280EUA-T
A3280LLHLT
A3280LLHLT-T–Yes
A3280LLT
A3280LLT-T
A3280LLTTR
A3280LLTTR-T–Yes
A3280LUA
A3280LUA-T
A3281ELHLT
A3281ELHLT-T–Yes
A3281ELT
A3281ELT-T
A3281ELTTR
A3281ELTTR-T–Yes
A3281EUA
A3281EUA-T
A3281LLHLT
A3281LLHLT-T–Yes
A3281LLT
A3281LLT-T
A3281LLTTR
A3281LLTTR-T–Yes
A3281LUA
A3281LUA-T
A3283ELHLT
A3283ELHLT-T–Yes
A3283ELT
A3283ELT-T
A3283ELTTR
A3283ELTTR-T–Yes
A3283EUA
A3283EUA-T
A3283LLHLT
A3283LLHLT-T–Yes
A3283LLT
A3283LLT-T
A3283LLTTR
A3283LLTTR-T–Yes
A3283LUA
A3283LUA-T
*Contact Allegro for additional packing options.
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
7-in. reel, 3000 pieces/reel SOT23W Surface Mount
Bulk, 500 pieces/bag
SOT89 Surface Mount
7-in. reel, 1000 pieces/reel
Bulk, 500 pieces/bag 4-pin SIP through hole
Ambient, T
(°C)
–40 to 85
–40 to 150
–40 to 85
–40 to 150
–40 to 85
–40 to 150
A
B
RP(MIN)
(TA = 25°C)
(G)
–40 40
–90 90
–180 180
B
OP(MAX)
(TA = 25°C)
(G)
www.allegromicro.com
2
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
800
REG.
TO ALL
SUBCIRCUITS
OUTPUT
X
CONTROL
DYNAMIC
OFFSET CANCELLATION
& HOLD
SAMPLE
FILTER
LOW-PASS
CURRENT
LIMIT
<1Ω
GROUND
Dwg. FH-020-1
Suffix ‘–LH’ Pinning
(SOT23W)
700
600
500
Suffix "–LH"
R
θJA
400
300
200
100
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
0
20 60 100 140
= 228°C/W
40 80 120 180
Suffix "–UA"
R
θJA
= 165°C/W
Suffix "E–"
AMBIENT TEMPERATURE in °°°°C
3
Suffix "–LT"
R
θJA
= 180°C/W
Suffix "L–"
X
V
CC
12
SUPPLY
160
Dwg. GH-046-2D
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, 2003, 2004 Allegro MicroSystems, Inc.
3
PTCT
GROUND
Dwg. PH-003-4
OUTPUT
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage Range V
Output Leakage Current I
Output Saturation Voltage V
OUT(SAT)
Output Current Limit I
Power-On Time t
Chopping Frequency f
Output Rise Time t
Output Fall Time t
Supply Current I
CC
OFF
OM
po
C
r
f
CC
Operating, TJ < 165°C
V
= 24 V, B < B
OUT
I
= 20 mA, B > B
OUT
B > B
OP
VCC > 4.2 V – – 50 µs
RL = 820 Ω, CL = 20 pF – 0.2 2.0 µs
RL = 820 Ω, CL = 20 pF – 0.1 2.0 µs
B < BRP, VCC = 12 V – 3.0 8.0 mA
1
RP
OP
B > BOP, VCC = 12 V – 4.0 8.0 mA
Reverse Battery Current I
CC
Zener Voltage VZ + V
Zener Impedance z
+ z
z
D
D
V
= -30 V – – -5.0 mA
RCC
ICC = 15 mA, TA = 25°C 283237 V
ICC = 15 mA, TA = 25°C–50–Ω
NOTES: 1. Maximum voltage must be adjusted for power dissipation and junction temperature.
2. BOP = operate point (output turns on); BRP = release point (output turns off).
3. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
4.2–24V
––10µA
– 185 500 mV
30 – 60 mA
– 340 – kHz
MAGNETIC CHARACTERISTICS over operating voltage range.
Part Numbers
A3280 A3281 A3283
Characteristic Test Conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units
Operate Point, B
at TA = +25°C and TA = max. 5.0 22 40 15 50 90 100 150 180 G
OP
at TA = -40°C 5.0 – 40 15 – 90 100 – 200 G
Release Point, B
at TA = +25°C and TA = max. -40 -23 -5.0 -90 -50 -15 -180 -150 -100 G
RP
at TA = -40°C -40 – -5.0 -90 – -15 -200 – -100 G
Hysteresis, B
(BOP - BRP)
hys
at TA = +25°C and TA = max. 10 45 80 30 100 180 – 300 360 G
at TA = -40°C – – 80 – – 180 – – 360 G
NOTES: 1. Complete part number includes a suffix to identify operating temperature range (E or L) and
package type (LH, LT, or UA).
2. As used here, negative flux densities are defined as less than zero (algebraic convention) and -50 G is less than +10 G.
3. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
www.allegromicro.com
1
4
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature
A3280* SWITCH POINTS
50
40
30
20
10
0
-10
-20
SWITCH POINTS IN GAUSS
-30
-40
-50
-50
VCC = 4.5 V
CC
= 24 V
V
0 50 100
AMBIENT TEMPERATURE IN °°°°C
A3283* SWITCH POINTS
200
OPERATE POINT
RELEASE POINT
150-25 25 75 125
Dwg. GH-026-3
A3281* SWITCH POINTS
100
80
60
40
20
0
-20
-40
SWITCH POINTS IN GAUSS
-60
-80
-100
-50
VCC = 4.5 V to 24 V
0 50 100
AMBIENT TEMPERATURE IN °°°°C
OPERATE POINT
RELEASE POINT
150-25 25 75 125
Dwg. GH-026-4
160
120
80
40
0
-40
-80
SWITCH POINTS IN GAUSS
-120
-160
-200
-50
VCC = 4.5 V
CC = 24 V
V
0 50 100
AMBIENT TEMPERATURE IN °°°°C
OPERATE POINT
RELEASE POINT
150-25 25 75 125
Dwg. GH-026-6
* Complete part number includes a suffix denoting operating temperature range (E or L) and package type (LH, LT, or UA).
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3280, 3281,
CHOPPER-STABILIZED,
HALL-EFFECT LATCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature (cont'd)
AND
3283
PRECISION
OUTPUT SATURATION VOLTAGE
300
IOUT = 20 mA
V
CC = 12 V
200
100
SATURATION VOLTAGE IN mV
0
-50
0 25 50 75 100
AMBIENT TEMPERATURE IN °°°°C
SUPPLY CURRENT
6.0
5.0
4.0
SUPPLY CURRENT IN mA
150-25 125
Dwg. GH-029-4
3.0
2.0
-50
OUTPUT OFF, B < B
0 255075100
AMBIENT TEMPERATURE IN °°°°C
TYPICAL OPERATING CHARACTERISTICS
as a function of supply voltage
VCC = 12 V
OUTPUT ON, B > B
RP
OP
125-25 150
Dwg. GH-028-5
A3280* SWITCH POINTS
40
20
0
-20
SWITCH POINT IN GAUSS
-40
3.0
3.5
SUPPLY VOLTAGE IN VOLTS
OPERATE POINT
RELEASE POINT
4.0 4.5 5.0
TA = 150°C
A
= -40°C
T
24
Dwg. GH-021-3
80
40
0
-40
SWITCH POINT IN GAUSS
-80
3.0
A3281* SWITCH POINTS
OPERATE POINT
RELEASE POINT
3.5
4.0 4.5 5.0
SUPPLY VOLTAGE IN VOLTS
TA = 150°C
A
= -40°C
T
* Complete part number includes a suffix denoting operating temperature range (E or L) and package type (LH, LT, or UA).
24
Dwg. GH-021-1
www.allegromicro.com
6
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
SENSOR LOCATIONS
Package Designator ‘LH’
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
A
1
Package Designator ‘LT’
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
A
3
0.059"
1.49 mm
2
0.088"
2.24 mm
0.038"
0.96 mm
Dwg. MH-025
0.045"
1.14 mm
TYPICAL OPERATING CHARACTERISTICS
as a function of supply voltage (cont’d)
OUTPUT SATURATION VOLTAGE
250
225
200
175
SATURATION VOLTAGE IN mV
150
3.0
3.5
4.0 4.5 5.0
SUPPLY VOLTAGE IN VOLTS
I
OUT
= 20 mA
TA = 150°C
A
= +25°C
T
A
= -40°C
T
Dwg. GH-055-1
24
1 32
Dwg. MH-008-8A
Package Designator ‘UA’
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.080"
2.04 mm
0.056"
1.44 mm
A
BRANDED
SURFACE
Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.
2
1
3
Dwg. MH-011-9B
SUPPLY CURRENT
8.0
7.0
6.0
5.0
4.0
3.0
SUPPLY CURRENT IN mA
2.0
1.0
0
4.0 6.0 9.0
3.0
5.0
SUPPLY VOLTAGE IN VOLTS
Allegro
OUTPUT ON
TA = 150°C
T
A
= +25°C
A
= -40°C
T
10 118.07.0
12
Dwg. GH-058-4
7
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
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. The output of these devices switches low (turns
on) when a magnetic field perpendicular to the Hall sensor
exceeds the operate point threshold (BOP). After turn-on, the
output is capable of sinking 25 mA and the output voltage is
V
OUT(SAT)
sufficient strength towards the branded surface of the device
will turn the device on; removal of the south pole will leave the
device on. When the magnetic field is reduced below the
release point (BRP), the device output goes high (turns off). The
difference in the magnetic operate and release points is the
hysteresis (B
clean switching of the output even in the presence of external
mechanical vibration and electrical noise.
BOP and higher than BRP) will allow an indeterminate output
state. The correct state is warranted after the first excursion
beyond BOP or BRP.
. Note that the device latches; that is, a south pole of
) of the device. This built-in hysteresis allows
hys
Powering up in the absence of a magnetic field (less than
HALL-EFFECT LATCHES
REG
X
+V
V
CC
OUTPUT VOLTAGE
0
-B
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
& HOLD
SAMPLE
Dwg. EH-012
B
+V
—
HALL
VOLTAGE
+
Dwg. AH-011-2
B
RP
FLUX DENSITY
B
OP
V
OUT(SAT)
0 +B
Dwg. GH-034-5
www.allegromicro.com
8
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
APPLICATIONS INFORMATION
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.
SUPPLY
3
PTCT
X
CC
V
2
0.1 µF
1
OUTPUT
SUPPLY
Dwg. EH-013
The simplest form of magnet that will operate these devices is a ring magnet. Other methods of operation, such as linear
magnets, are possible.
Extensive applications information for Hall-effect sensors is available in:
• Hall-Effect IC Applications Guide, Application Note 27701;
• Hall-Effect Devices: Soldering, Gluing, Potting, Encapsulating, and Lead Forming, Application Note 27703.1;
• Soldering of Through-Hole Hall-Sensor Dervices, Application Note 27703; and
• Soldering of Surface-Mount Hall-Sensor Devices, Application Note 27703.2.
More detailed descriptions of the chopper-stabilized circuit operation can be found in:
• Monolithic Magnetic Hall Sensor Using Dynamic Quadrature Offset Cancelation, Technical Paper STP 97-10; and
• Chopper-Stabilized Amplifiers With A Track-and-Hold Signal Demodulator, Technical Paper STP 99-1.
All are provided at
www.allegromicro.com
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.
9
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
CHOPPER-STABILIZED,
7
HALL-EFFECT LATCHES
PACKAGE DESIGNATOR ‘LH’
(SOT23W, fits SC-59A solder-pad layout)
3280, 3281,
PRECISION
AND
3283
0.083
0.073
0.022
REF
0.006
0.000
0.122
0.114
0.020
0.012
12
Dimensions in Inches
(for reference only)
3
0.118
0.106
GAUGE PLANE
SEATING PLANE
0.037
BSC
0.045
0.0079
0.0050
0.032
0° TO 8°
0.010
BSC
Dwg. MA-010-3D in
0.010
MIN
0.55
REF
0.15
0.00
2.10
1.85
Dimensions in Millimeters
(controlling dimensions)
3.10
2.90
0.50
0.30
3
12
3.00
2.70
GAUGE PLANE
SEATING PLANE
0.95
BSC
1.13
0.87
0.20
0.127
0° TO 8°
0.25
BSC
Dwg. MA-010-3D mm
0.25
MIN
0.70
3
12
Dwg. MA-011-3 mm
0.039
12
0.028
3
1.00
0.094
0.03
Dwg. MA-011-3 in
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. Where no tolerance is specified, dimension is nominal.
5. Add "LT" to part number for tape and reel.
www.allegromicro.com
2.40
0.95
10
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
PACKAGE DESIGNATOR ‘LT’
(SOT89/TO-243AA)
0.167
0.155
0.047
0.035
0.059
BSC
1
Dimensions in Inches
(for reference only)
0.181
0.173
0.072
0.064
0.102
0.0221
0.0173
0.090
0.0189
0.0142
23
0.118
BSC
0.063
0.055
0.090
0.084
0.0173
0.0138
Dwg. MA-009-3A in
4.25
3.94
1.20
0.89
1.50
BSC
Dimensions in Millimeters
(controlling dimensions)
4.60
4.40
1.83
1.62
2.60
0.56
0.44
2.29
0.48
0.36
1
23
3.00
BSC
1.60
1.40
2.29
2.13
0.44
0.35
Dwg. MA-009-3A mm
0.098
0.079
B
1
0.028
TYP
Pads 1, 2, 3, and A — Standard SOT89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
0.031
3
0.102
0.047
0.031
TYP
0.181
0.7
TYP
A
2
Pads 1, 2, 3, and A — Standard SOT89 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
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Supplied in bulk pack (500 pieces per bag) or add "TR" to part number for tape and reel.
3. Only low-temperature (≤240°C) reflow-soldering techniques are recommended for SOT89 devices.
11
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2.5
2.0
B
0.8
A
2.6
4.6
13
2
1.2
0.8
TYP
Dwg. MA-012-3 mm
HALL-EFFECT LATCHES
PACKAGE DESIGNATOR ‘UA’
3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
SEE NOTE
45°
0.122
0.117
0.640
0.600
Dimensions in Inches
(controlling dimensions)
0.164
0.159
0.085
123
MAX
0.062
0.058
0.031
0.0189
0.0142
0.0173
0.0138
45°
SEE NOTE
Dimensions in Millimeters
(for reference only)
4.17
4.04
45°
3.10
2.97
2.16
123
MAX
16.26
15.24
1.57
1.47
45°
0.79
0.44
0.35
0.48
0.36
0.050
BSC
Dwg. MH-014E in
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. Supplied in bulk pack (500 pieces per bag).
1.27
BSC
Dwg. MH-014E mm
www.allegromicro.com
12
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