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Data Sheet
AAT001-10E TMR Angle Sensor
Key Features
? Tunneling Magnetoresistance (TMR) Technology
? Very High Output Signal Without Amplification
? Wide Airgap Tolerance
? Very High Resistance for Extremely Low Power
? Sine and Cosine Outputs for Direction Detection
? Ultraminiature TDFN6 Package
Typical Applications
? Rotary Encoders
? Batttery-Powered Rotary Position Sensors
? Motor Shaft Position Sensors
Description
The AAT001-10E angle sensor is a low power, high output magnetic sensor element able to provide
rotational position measurements when a rotating magnetic field is applied to the sensor. Sine and cosine
signals are available for a quadrature output.
The sensor element has a resistance of approximately 1.25 M ? and can be operated at typical battery
voltages to conserve power. Outputs are proportional to the supply voltage and peak-to-peak output voltages
are much larger than other sensor technologies.
The part is packaged in NVE’s 2.5 mm x 2.5 mm x 0.8 mm TDFN6 surface-mount package.
Operation
Each of the four sensor elements contains two magnetic layers: a “pinned,” or fixed direction layer; and a
movable-direction, or “free” layer. The diagram below illustrates the configuration, using arrows to represent
the magnetic orientation of the layers:
Angle between
pinned and free
layers determines
sensor resistance
Free layer aligns
with applied
magnetic field
NVE Corporation
?
11409 Valley View Road, Eden Prairie, MN 55344-3617
?
(952) 829-9217
?
www.nve.com
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