27621.30A鈥?/div>
3161
HALL-EFFECT SWITCH
FOR 2-WIRE APPLICATIONS
This Hall-effect switch is a monolithic integrated circuit designed to
operate continuously over extended temperatures to +85掳C. The unipo-
lar switching characteristic makes this device ideal for use with a simple
bar or rod magnet. The A3161ELT and A3161EUA are identical except
for package.
Each device includes a voltage regulator for operation with supply
voltages of 3.5 to 25 volts, reverse battery protection diode, quadratic
Hall-voltage generator, temperature compensation circuitry, small-signal
amplifier, Schmitt trigger, and a constant-current open-collector output.
Noise radiation is limited by control of the output current slew rate.
Two package styles provide a magnetically optimized package for
most applications. Suffix 鈥楲T鈥?is a miniature SOT-89/TO-243AA
transistor package for surface-mount applications; suffix 鈥楿A鈥?is a three-
lead ultra-mini SIP for through-hole mounting.
V
X
CC
1
2
3
GROUND
Dwg. PH-003-3
OUTPUT
SUPPLY
FEATURES and BENEFITS
I
Internal Current Regulator for 2-Wire Operation
I
Output Slew Rate Controlled
I
3.5 V to 25 V Operation 鈥?Needs Only An Unregulated Supply
I
I
I
I
I
I
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
掳
C
Supply Voltage, V
CC
Continuous .................................
28 V
Surge (t
w
鈮?/div>
100 ms) ....................
40 V
Reverse Battery Voltage, V
RCC
Continuous ................................
-25 V
Surge (t
w
鈮?/div>
100 ms) ...................
-40 V
Magnetic Flux Density, B .......
Unlimited
Output OFF Voltage, V
OUT
..............
28 V
Operating Temperature Range,
T
A
.............................
-40
掳
C to +85
掳
C
Storage Temperature Range,
T
S
...........................
-65
掳
C to +170
掳
C
Reverse Battery Protection
Excellent Temp. Stability
Activate with Small, Commercially Available Permanent Magnets
Small Size
Solid-State Reliability 鈥?No Moving Parts
Resistant to Physical Stress
Always order by complete part number, e.g.,
A3161ELT .
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2
3
4
5
6
7
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