Switching Hysteresis
15-90 G 150-250 G
Operating Temp. Range Device Type Number
-40°C to +85°C A3046EU A3058EU
A3056EU
-40°C to +150°C A3046LU A3058LU
A3056LU
HALL EFFECT GEAR-TOOTH SENSORS
–ZERO SPEED
The A3046EU/LU, A3056EU/LU, and A3058EU/LU Hall effect
gear-tooth sensors are monolithic integrated circuits that switch in
response to differential magnetic fields created by ferrous targets.
These devices are ideal for use in gear-tooth-based speed, position,
and timing applications and operate down to zero rpm over a wide
range of air gaps and temperatures. When combined with a back-
biasing magnet and proper assembly techniques, devices can be
configured to give 50% duty cycle or to switch on either leading,
trailing, or both edges of a passing gear tooth or slot.
The six devices differ only in their magnetic switching values and
operating temperature ranges. The low hysteresis of the A3046/56EU
and A3046/56LU makes them perfectly suited for ABS (anti-lock brake
system) or speed sensing applications where maintaining large air
gaps is important. The A3046EU/LU features improved switch point
stability with temperature over the A3056EU/LU. The high hysteresis
of the A3058EU and A3058LU, with their excellent temperature
stability, makes them especially suited to ignition timing applications
where switch-point accuracy (and latching requirements) is extremely
important.
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BENEFITS
a73 Senses Ferrous Targets Down to Zero RPM
a73 Large Effective Air Gap
a73 Wide Operating Temperature Range
a73 Operation from Unregulated Supply
a73 High-Speed Operation
a73 Output Compatible With All Logic Families
a73 Reverse Battery Protection
a73 Solid-State Reliability
a73 Resistant to Physical Stress
Dwg. PH-012
1
SUPPLY
V
CC
GROUND
32
OUTPUT
X X
Pinning is shown viewed from branded side.
SELECTION GUIDE
Data Sheet
27612A†
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
. . . . . . . . . . . . . . 28 V
Reverse Battery Voltage,
V
RCC
. . . . . . . . . . . . . . . . . . . . . . -30 V
Magnetic Flux Density, B . . . . . Unlimited
Output OFF Voltage, V
OUT
. . . . . . . . . 28 V
Reverse Output Voltage, V
OUT
. . . . . -0.5 V
Output Current, I
OUT
. . . . . . . . . . . . 25 mA
Package Power Dissipation, P
D
. . 500 mW
Operating Temperature Range, T
A
Suffix “EU” . . . . . . . . . -40°C to +85°C
Suffix “LU” . . . . . . . . -40°C to +150°C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . . -65°C to +170°C
3046, 3056, AND
3058