ALLEGRO 3163 User Manual
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3163
FOR 2-WIRE APPLICATIONS
HALL-EFFECT SWITCH
Data Sheet
27621.31†
Suffix 'UA' Pinning
(ultra-mini SIP)
X
1
SUPPLY
GROUND
32
This Hall-effect switch is a monolithic integrated circuit designed to
operate continuously over extended temperatures to +85°C. The unipolar switching characteristic makes this device ideal for use with a simple
bar or rod magnet. The A3163ELT and A3163EUA are identical except
for package.
Each device includes a voltage regulator for operation with supply
voltages of 3.5 to 24 volts, reverse-battery protection, quadratic Hallvoltage generator for low offset, temperature compensation circuitry,
small-signal amplifier, Schmitt trigger, and a constant-current opencollector output, wired internally for true 2-wire operation. Noise
radiation is limited by control of the output-current slew rate.
Two package styles provide a magnetically optimized package for
most applications. Suffix ‘LT’ is a miniature SOT89/TO-243AA transistor package for surface-mount applications; suffix ‘UA’ is a three-lead
ultra-mini SIP for through-hole mounting; it is also available with lead
forming for surface-mount applications (suffix 'UA-TL').
GROUND
Dwg. PH-003-7A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at T
= +25°C
A
Supply Voltage, VCC................ 26.5 V
Reverse Battery Voltage, V
Magnetic Flux Density, B ..... Unlimited
Package Power Dissipation, PD See Graph
Junction Temperature, T
Operating Temperature Range,
........................ -40°C to +85°C
T
A
Storage Temperature Range,
T
...................... -65°C to +170°C
S
.... -16 V
RCC
....... +170°C
J
FEATURES and BENEFITS
■ Internal Current Regulator for 2-Wire Operation
■ Output Slew Rate Controlled
■ 3.5 V to 24 V Operation … Needs Only An Unregulated Supply
■ Reverse Battery Protection
■ Excellent Temperature Stability
■ Activate with Small, Commercially Available Permanent Magnets
■ Small Size
■ Solid-State Reliability … No Moving Parts
■ Resistant to Physical Stress
Always order by complete part number, e.g., A3163ELT .
3163
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
REG.
X
SUPPLY
GROUND
Dwg. FH-017-1
800
700
Suffix "UA"
R
θJA
600
500
400
300
200
100
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
0
Suffix "LT"
R
θJA
= 180°C/W
20 60 100 140
40 80 120 180
= 165°C/W
AMBIENT TEMPERATURE in °°°°C
160
Dwg. GH-046-6A
Suffix 'LT' Pinning
(SOT89/TO-243AA)
X
NC
1
SUPPLY
GROUND
32
Dwg. PH-003-6
CONNECTION
NO (INTERNAL)
Pinning is shown viewed from branded side.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2002 Allegro MicroSystems, Inc.
3163
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
ELECTRICAL CHARACTERISTICS over operating voltage and temperature ranges.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage V
Output Current I
CC
OUT(H)
I
OUT(L)
Output Slew Rate di/dt C
Output Settling Time t
Reverse Battery Current I
sd
CCR
Operating 3.5 — 24 V
B > B
OP
B < B
RP
= 20 pF — 7.0 20 mA/µs
L
C
= 20 pF — — 20 µs
L
V
= -16 V — — -15 mA
RCC
12 14 17 mA
5.0 5.6 6.9 mA
MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic Symbol Min. Typ. Max. Units
Operate Point (output turns on) B
Release Point (output turns off) B
Hysteresis (BOP – BRP)B
NOTES: 1. Typical Data is at T
= +25°C and V
A
= 12 V and is for design information only.
CC
OP
RP
hys
2. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
– 98 160 G
30 79 – G
5.0 19 40 G
www.allegromicro.com
3
3163
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS LOAD CURRENT
120
OPERATE POINT, B
110
100
90
80
70
SWITCH POINTS in GAUSS
60
VCC = 3.5 V
CC
V
CC
V
RELEASE POINT, B
VCC = 3.5 V
V
CC
= 12 V
CC
= 24 V
V
= 12 V
= 24 V
OP
RP
20
15
) in mA
OUT
10
5.0
LOAD CURRENT (I
I
OUT(H)
, B > B
VCC = 24 V
CC
= 12 V
V
CC
= 3.5 V
V
I
OUT(L)
, B < B
VCC = 3.5 V
CC
= 12 V
V
CC
= 24 V
V
OP
RP
50
-50
0 50 100
AMBIENT TEMPERATURE in °°°°C
150-25 25 75 125
Dwg. GH-044-5
0
-50
0 255075100
125-25 150
AMBIENT TEMPERATURE in °°°°C
Dwg. GH-028-10
4
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
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