AMRAngle Sensor

AMR3013P

MultiDimension Technology Co., Ltd.

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Web: www.dowaytech.com/en, Email: info@dowaytech.com

MDT AMR3013P

No.7 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, 215634, P.R. China

Ver. 1.2

AMR3013P AMR Angle Sensor

Features and Benefits

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Anisotropy of magnetoresistance (AMR) Technology

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Compatible with Wide Range of Supply Voltages

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Wide Airgap Tolerance

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Excellent Thermal Stability

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Very Low Hysteresis



Compact Package

Applications



Rotary Position Sensors



Rotary Encoders

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Contactless Potentiometers

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Valve Position Sensors



Knob Position Sensors

General Description

The output voltage of the AMR3013PAMR angle sensor is proportional to the sine or cosine functions

of two times of the angle – sin(2α) and cos(2α) – of a magnetic field applied parallel to the surface of

the sensor, which can be provided by a small magnet positioned above the device. The AMR3013P

includes two Wheatstone bridges, which can be configured to output sine and cosine functions

respectively. Each bridge includes four AMR sensor elements in a push-pull arrangement to produce

a peak-to-peak signal at 2.6% of the supply voltage. Additionally, the unique AMR Wheatstone bridge

technology accurately compensates the output against changes in ambient temperature. This sensor

is assembled in a compact SOP8 package

Operation

A small magnet, placed above the AMR3013P, can be used to provide a magnetic field in any desired

orientation parallel to the plane of the AMR3013P package. The following chart show a typical sensor

output as a function of the angle within 0~180 of the applied magnetic field using a 6 mm diameter,

2.5 mm thick magnet and at 1 V supply.