A3134UA [ALLEGRO]
BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION; 双极霍尔效应开关高温作业
| 型号： | A3134UA |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION |
| 文件： | 总6页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3134
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMPERATURE OPERATION
This low-hysteresis bipolar Hall-effect switch is an extremely
temperature-stable and stress-resistant sensor especially suited for
operation over extended temperature ranges to +150°C. Superior
high-temperature performance is made possible through a novel Schmitt
trigger circuit that maintains operate and release point stability by
compensating for temperature changes in the Hall element. Additionally,
internal compensation provides magnetic switch points that become more
sensitive with temperature, hence offsetting the usual degradation of the
magnetic field with temperature. Its low hysteresis makes this device
ideal for detecting small changes in magnetic field strength or for use
with inexpensive magnets.
V
CC
The device includes on a single silicon chip a voltage regulator,
quadratic Hall-voltage generator, temperature compensation circuit,
signal amplifier, Schmitt trigger, and a buffered open-collector output to
sink up to 25 mA. The on-board regulator permits operation with supply
voltages of 4.5 volts to 24 volts.
1
2
3
The first character of the part number suffix determines the device
operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and
suffix ‘L–’ is -40°C to +150°C. Two package styles provide a magneti-
cally optimized package for most applications. Suffix ‘–LT’ is a minia-
ture SOT89/TO-243AA transistor package for surface-mount applica-
tions while suffix ‘–UA’ is a three-lead ultra-mini-SIP.
Dwg. PH-003A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at T = +25°C
A
FEATURES
Supply Voltage, VCC ............................. 30 V
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Open-Collector 25 mA Output
■ Reverse Battery Protection
■ Activate With Small, Commercially Available Permanent Magnets
■ Solid-State Reliability
Reverse Battery Voltage, VRCC .......... -30 V
Magnetic Flux Density, B .......... Unlimited
Output OFF Voltage, VOUT .................. 30 V
Reverse Output Voltage, VOUT ........... -0.5 V
Continuous Output Current,
IOUT ............................................ 25 mA
Operating Temperature Range, TA
■ Small Size
Suffix ‘E–’ .................. -40°C to +85°C
Suffix ‘L–’ ................ -40°C to +150°C
Storage Temperature Range,
■ Resistant to Physical Stress
TS .............................. -65°C to +170°C
Always order by complete part number, e.g., A3134ELT .
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
FUNCTIONAL BLOCK DIAGRAM
1
V
CC
REG.
3
2
OUTPUT
GROUND
X
Dwg. FH-005-3
ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V.
Limits
Characteristic
Symbol
VCC
Test Conditions
Operating
Min.
4.5
—
Typ.
—
Max.
24
Units
V
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
VOUT(SAT)
IOFF
IOUT = 20 mA, B > BOP
VOUT = 24 V, B < BRP
175
0.05
400
1.0
mV
µA
—
ICC
B < BRP
B > BOP
(Output
(Output
OFF)
ON)
—
3.2
5.0—
9.0mA
mA
—
Output Rise Time
Output Fall Time
tr
tf
RL = 820 Ω, CL = 20 pF
RL = 820 Ω, CL = 20 pF
—
100
100
—
—
ns
ns
—
MAGNETIC CHARACTERISTICS over oper. temp. and oper. supply voltage ranges.
Limits
Characteristic
Operate Point
Release Point
Hysteresis
Symbol
BOP
Test Conditions
Min.
Typ.
Max.
Units
-408.5
-50-19
5.027
60 G
BRP
50 G
55
Bhys
G
NOTES: BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).
As used here, negative flux densities are defined as less than zero (algebraic convention).
Typical values are at TA = +25°C and VCC = 12 V.
1 gauss (G) is exactly equal to 0.1 millitesla (mT).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, 2003 Allegro MicroSystems, Inc.
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
HYSTERESIS
50
40
40
20
V
= 4.5 V–24 V
CC
OPERATE POINT
30
20
10
0
0
-20
-40
V
= 4.5 V–24 V
CC
RELEASE POINT
100
-50
-25
0
25
50
75
125
150
100
-50
-25
0
25
50
75
125
150
°
AMBIENT TEMPERATURE IN
C
°
AMBIENT TEMPERATURE IN
C
Dwg. GH-051
Dwg. GH-052
OUTPUT SATURATION VOLTAGE
SUPPLY CURRENT
5.0
4.0
3.0
300
I
= 20 mA
OUT
B < B
RP
V
= 4.5–24 V
CC
200
V
= 24 V
CC
V
= 12 V
CC
V
= 4.5 V
CC
100
2.0
1.0
0
-50
100
150
-50
-25
0
25
50
75
125
150
100
125
-25
0
25
50
75
°
AMBIENT TEMPERATURE IN
C
°
AMBIENT TEMPERATURE IN C
Dwg. GH-053
Dwg. GH-029
www.allegromicro.com
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
SENSOR LOCATIONS
APPLICATIONS INFORMATION
(±0.005" [0.13 mm] die placement)
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
Suffix “LT”
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
0.090"
2.27 mm
0.050"
1.27 mm
• Soldering of Surface-Mount Hall-Sensor Devices, Application Note 27703.2.
All are provided in Allegro Electronic Data Book, AMS-702. or at
www.allegromicro.com
A
1
2
3
OPERATION
The output of these devices (pin 3) switches low when the magnetic field
at the Hall sensor exceeds the operate point threshold (BOP). At this point, the
output voltage is VOUT(SAT). When the magnetic field is reduced to below the
release point (BRP) the device output goes high. Note especially that release
can occur when the magnetic field is removed but to ensure release, a field
reversal is required. The difference in the magnetic operate and release points
is called the hysteresis (Bhys) of the device. This built-in hysteresis allows
clean switching of the output even in the presence of external mechanical
vibration and electrical noise.
Dwg. MH-008-4C
Suffix “UA”
ACTIVE AREA DEPTH
0.0195"
0.083"
2.10 mm
0.50 mm
NOM
0.060"
1.51 mm
Powering up the device in the absence of a magnetic field (less than BOP
and higher than BRP) will allow in indeterminate output state. The correct state
is warranted after the first excursion beyond BOP or BRP.
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-4C
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 infringe-
ments of patents or other rights of third parties that may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
PACKAGE DESIGNATOR ‘LT’
(SOT89/TO-243AA)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0.181
4.60
1.60
0.063
0.055
0.173
4.40
1.40
0.0173
0.0138
0.44
0.35
0.072
0.064
1.83
1.62
2.60
2.29
2.29
2.13
0.102
0.090
0.090
0.084
0.167
0.155
4.25
3.94
2
3
2
3
1
1
0.48
0.36
0.0189
0.0142
0.0221
0.0173
1.20
0.047
0.89
0.035
0.56
0.44
1.50
0.059
BSC
BSC
3.00
0.118
BSC
BSC
Dwg. MA-009-3A mm
Dwg. MA-009-3A in
2.5
2.0
0.098
0.079
B
0.8
B
0.031
2.6
0.102
0.181
A
A
2
4.6
1.2
0.8
0.047
3
1
2
3
1
0.7
TYP
0.028
TYP
0.031
TYP
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
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 mm
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.
www.allegromicro.com
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
PACKAGE DESIGNATOR ‘UA’
Dimensions in Millimeters
Dimensions in Inches
(controlling dimensions)
(for reference only)
0.164
0.159
4.17
4.04
0.062
0.058
1.57
1.47
45°
45°
0.122
0.117
3.10
2.97
45°
45°
0.031
0.79
0.085
MAX
2.16
MAX
1
2
3
1
2
3
16.26
15.24
0.44
0.35
0.640
0.600
0.0173
0.0138
0.48
0.36
0.0189
0.0142
SEE NOTE
SEE NOTE
1.27
BSC
0.050
BSC
Dwg. MH-014E mm
Dwg. MH-014E in
Radial Lead Form (order A3240xUA-LC)
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
2
3
0.108"
(2.74 mm)
0.620"
0.500"
(15.7 mm
12.7 mm)
0.100"
(2.5 mm)
Dwg. MH-026
NOTE: Lead-form dimensions are the nominals produced on the
forming equipment. No dimensional tolerance is implied or
guaranteed for bulk packaging (500 pieces per bag).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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