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3134 Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer 3134
Beschreibung BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 6 Seiten
3134 Datasheet, Funktion
3134
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMPERATURE OPERATION
V
CC
12
3
Dwg. PH-003A
Pinning is shown viewed from branded side.
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.
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.
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.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC ............................. 30 V
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
Suffix ‘E–’ .................. -40°C to +85°C
Suffix ‘L–’ ................ -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
FEATURES
s Superior Temperature Stability
s Operation From Unregulated Supply
s Open-Collector 25 mA Output
s Reverse Battery Protection
s Activate With Small, Commercially Available Permanent Magnets
s Solid-State Reliability
s Small Size
s Resistant to Physical Stress
Always order by complete part number, e.g., A3134ELT .






3134 Datasheet, Funktion
3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
PACKAGE DESIGNATOR ‘UA’
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.164
0.159
4.17
4.04
0.062
45° 0.058
1.57
45° 1.47
0.122
0.117
0.085 1 2 3 0.031
MAX
0.640
0.600
45°
0.0173
0.0138
SEE NOTE
0.0189
0.0142
0.050
BSC
Dwg. MH-014E in
NOTES: 1.
2.
3.
4.
5.
6.
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.
Recommended minimum PWB hole diameter to clear
transition area is 0.035" (0.89 mm).
Where no tolerance is specified, dimension is nominal.
Supplied in bulk pack (500 pieces per bag).
3.10
2.97
2.16 1 2 3 0.79
MAX
16.26
15.24
45°
0.44
0.35
SEE NOTE
0.48
0.36
1.27
BSC
Dwg. MH-014E mm
Radial Lead Form (order A3240xUA-LC)
0.620"
0.500"
(15.7 mm
12.7 mm)
123
0.108"
(2.74 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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