Data Sheet 27621.6A
Always order by complete part number, e.g., A3141ELT .
The Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150°C, and are more stable with both temperature and supply voltage changes. The unipolar switching
characteristic makes the devices ideal for u with a simple bar or rod magnet. The four basic devices (3141, 3142, 3143, and 3144) are identical except for magnetic switch points.
Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, rever battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be ud with bipolar or CMOS logic circuits. The A3141– and A3142– are im-proved replacements for the UGN/UGS3140–; the A3144– is the improved replacement for the UGN/UGS3120–.
The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for the automotive and
industrial temperature range of -40°C to +85°C. Suffix ‘L–’ is for the automotive and military temperature range of -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transis-tor package for surface-mount applications; suffix ‘–U’ is a three-lead plastic mini-SIP, while suffix ‘–UA’ is a three-lead ultra-mini-SIP.
FEATURES and BENEFITS
s Superior Temp. Stability for Automotive or Industrial Applications s 4.5 V to 24 V Operation … Needs Only An Unregulated Supply s Open-Collector 25 mA Output … Compatible with Digital Logic s Rever Battery Protection
s Activate with Small, Commercially Available Permanent Magnets s Solid-State Reliability s Small Size
s Resistant to Physical Stress
SENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMPERATURE OPERATIONsimple是什么意思
3141 THRU 3144
3141 THRU 3144SENSITIVE
HALL-EFFECT SWITCHES
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachutts 01615-0036 (508) 853-5000在线汉英词典
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
NOTES:Typical values are at T A = +25°C and V CC = 8 V.
B OP = operate point (output turns ON); B RP = relea point (output turns OFF); B hys = hysteresis (B OP - B RP ).
*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).
ELECTRICAL CHARACTERISTICS at V CC = 8 V over operating temperature range.
Limits
Characteristic Symbol Test Conditions
什么事英语Min.Typ.Max.Units Supply Voltage
V CC Operating 4.5—24V Output Saturation Voltage V OUT(SAT)
I OUT = 20 mA, B > B OP —175
400
mV
Output Leakage Current I OFF V OUT = 24 V, B < B RP —<1.010µA Supply Current I CC B < B RP (Output OFF)— 4.49.0mA Output Ri Time t r R L = 820 Ω, C L = 20 pF —0.04 2.0µs Output Fall Time
t f
R L = 820 Ω, C L = 20 pF
—
0.18
2.0
µs
Part Numbers*
A3141–
A3142– A3143–A3144–Characteristic Min.
Typ.
Max.
Min.Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.B OP at T A = 25°C
5010016013018023022028034070—350over operating temp. range 3010017511518024520528035535
—
450B RP at T A = 25°C
104513075
125
175
165
225
285
50—
330over operating temp. range 10451456012519015022530025
—
430B hys at T A = 25°C
2055803055803055802055—over operating temp. range
2055
80
3055
803055
802055
—
Copyright © 1993, 1999, Allegro MicroSystems, Inc.
3141 THRU 3144
SENSITIVE
HALL-EFFECT SWITCHES FOR HIGH-TEMP . OPERATION
SUPPLY CURRENT
SUPPLY CURRENT
untether
10
15
20
25
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-041-1
5
S U P P L Y C U R R E N T I N m A
25
50
75
AMBIENT TEMPERATURE IN °C
-50
Dwg. GH-039-1
-25
S U P P L Y C U R R E N T I N m A
TYPICAL OPERATING CHARACTERISTICS
A3142– SWITCH POINTS
OUTPUT SATURATION VOLTAGE
生命中不能承受之轻是什么意思
300
AMBIENT TEMPERATURE IN °C
200
Dwg. GH-040-1
S A T U R A T I O N V O L T A G E I N m V
50
100
AMBIENT TEMPERATURE IN °C
-50
Dwg. GH-044
S W I T C H P O I N T I N G A U S S
300
400
200
100
150
0-25
25
75
mdio125
* Complete part number includes a suffix denoting operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).
3141 THRU 3144SENSITIVE
HALL-EFFECT SWITCHES
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachutts 01615-0036 (508) 853-5000
TYPICAL OPERATING CHARACTERISTICS (cont.)
CHANGE IN OPERATE POINT
10
15
20
25
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-042-1
5
C H A N G E I N O P E R A T E P O I N T I N G A U S S
-5.0
5.0
OPERATION
The output of the devices (pin 3) switches low when the magnetic field at the Hall nsor exceeds the operate point threshold (B OP ). At this point, the output voltage is V OUT(SAT). When the magnetic field is reduced to below the relea point threshold (B RP ), the device output goes high. The difference in the magnetic operate and relea points is called the hysteresis (B hys ) of the devi
ce. This built-in hysteresis allows clean switching of the output even in the prence of external mechanical vibration and electrical noi.
3141 THRU 3144
SENSITIVE
HALL-EFFECT SWITCHES FOR HIGH-TEMP . OPERATION
PACKAGE DESIGNATOR ‘LT’
(SOT-89/TO-243AA)
Dimensions in Inches (for reference only)
Dimensions in Millimeters (controlling dimensions)
龙娃主题曲
Dwg. MA-009-3 in
0.0550.063
0.0140.017
0.0840.090
Dwg. MA-009-3 mm
1.401.60
0.350.44
2.132.29
NOTES:1.Tolerances on package height and width reprent allowable mold offts. 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.
3141 THRU 3144SENSITIVE
何川洋take over
HALL-EFFECT SWITCHES
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachutts 01615-0036 (508) 853-5000
°
°
NOTES:1.Tolerances on package height and width reprent allowable mold offts. 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).
PACKAGE DESIGNATOR ‘U’
Dimensions in Inches Dimensions in Millimeters (controlling dimensions)
(for reference only)
Devices in the ‘U’ package are
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