【产品类别】 霍尔传感器
【产品用途】 齿轮齿速度霍尔传感器
【产品规格】 3-pin SIP
【生产厂家】 ALLEGRO
【技术参数】 A3046、A3056、A3058下载 DATESHEET
SENSORS-ZEROSPEED
A3046, A3056, A3058 现已停产
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
BENEFITS
s Senses Ferrous Targets Down to Zero RPM
s Large Effective Air Gap
s Wide Operating Temperature Range
s Operation from Unregulated Supply
High-Speed Operation
s Output Compatible With All Logic Families
Reverse Battery Protection
s Solid-State Reliability
Resistant to Physical Stress
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