2SA-10 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – Integrated 2-Axis Hall Sensor

2SA-10
Integrated 2-Axis Hall Sensor
2SA-10
November 2004
Features
• Measures two components of a magnetic field
at the same spot.
• Excellent matching of sensitivity along the two
axes.
• Max. angle error from –40°C ..+125°C: < 1°
• Very high sensitivity
• Low quiescent current
• Fabricated in standard CMOS technology
• Very low hysteresis
• Surface mount SOIC-8 package
Applications
• 2-D position sensing
• Contactless potentiometer
• Angular position sensor for micro motors
• Miniaturized contactless encoder
• Contactless rotary switch
• 2-D magnetic field mapping
• Joystick
General Description
Sentron’s new magnetic angular sensor 2SA-10 detects the absolute angular position of a small
magnet that is positioned above the device surface. The 2SA-10 is an integrated combination of a
CMOS Hall circuit and a thin ferromagnetic disk. The CMOS circuit contains two pairs of Hall-elements
for each of the two directions parallel with the chip surface X and Y. The ferromagnetic disk amplifies
the external magnetic field and concentrates it on the Hall elements.
The 2SA-10 is ideally suited for rotary position sensing in harsh automotive and industrial
environments. It produces two linear, ratio-metric output voltages proportional to the sine and the
cosine function of the angle of the applied magnetic field parallel to the chip surface.
The circuit is fabricated using a standard CMOS process and the ferromagnetic disk is added in a
simple post-processing step. The monolithic device incorporates Hall elements, offset cancellation
circuitry, current source, chopper stabilized amplification circuitry, parameter programming capability.
By dynamic offset cancellation any offset voltage caused by temperature variations, packaging stress
or others is strongly reduced. As a result, the device has an extremely stable signal output, is immune
to mechanical stress and is virtually immune to temperature cycling.
Therefore, the circuit features a wide application range and very high accuracy.
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Sentron AG • Baarerstrasse 73 • 6300 Zug • Switzerland • Tel: [phone] • Fax: [phone]
www.sentron.ch • [e-mail] •
for North America: GMW Associates • Tel: [phone] • Fax: [phone] • [e-mail]