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Date: 18th Mar 09
Hall effect based position sensor
for transportation and automotive applications
Vishay Intertechnology has unveiled a hall effect based
position sensor in hollow- and D-shaft versions for applications
in harsh environments.
This sensor code numbered 981 HE can tolerate high-frequency
vibrations up to 20 G and shocks up to 50 G over a temperature
range of -45°C to +125°C.
The sensor is optimized for foot pedal position sensors,
throttle position sensors, steering position sensors, drive-by-wire,
lift and shuttle position sensors, tilt control and tilt
positioning feedback, and suspension system position sensors
in marine, avionics, fork lift trucks, farm equipment, cranes,
and automotive applications.
With all electrical angles available up to 360° with
no dead band, the device features linearity down to ±0.5%.
The sensor offers a life of greater than 10 million cycles
for the D-shaft version, and greater than 5 million cycles
for the hollow-shaft version. The 981 HE provides continuous
performance for the life of the device with no drift of
linearity. Spring-loaded versions of the device are also
available.
The sensor operate at a supply voltage of 5 V ±10%.
The device features a typical supply current of 10 mA, and
16 mA for PWM output. The 981 HE offers +20-V over voltage
protection and -10-V reverse voltage protection. The recommended
load resistance is 1 kO for analog output and PWM output.
Samples of the 981 HE are available now. Production quantities
will be available in Q1 2009, with lead times of 12 weeks
for large orders.
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