TMR3001 Datasheet, PDF (1/5 Pages) American Electronic Components, inc – TMR Dual-Axis Angle Sensor

Datasheet V1.0a
TMR3001
TMR Dual-Axis Angle Sensor
General Description
The dual-axis output voltages of the TMR3001 TMR angle sensor are proportional to the sine and cosine of the angle 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 TMR3001 includes two Wheatstone bridges, which can be configured to output sine and cosine functions respectively. Each
bridge includes four TMR sensor elements in a push-pull arrangement to produce a best-in-class peak-to-peak signal as large as
90% of the supply voltage, eliminating the need for amplification in many applications. Additionally, the unique TMR Wheatstone
bridge technology accurately compensates the output against changes in ambient temperature. This sensor is assembled in a
compact LGA8 package of 3.0 mm × 3.0 mm × 0.9 mm.
Features and Benefits
 Tunneling Magnetoresistance (TMR) Technology
 Large Output Signal without Amplification
 Dual-Axis 360°Angle Measurement
 Compatible with wide Rang of Supply Voltages
 Fast Response for High-Speed Applications
 Wide Air-Gap Tolerance
 Excellent Thermal Stability
 Compact LGA Package
Applications
 Rotary Position Sensors
 Rotary Encoders
 Contactless Potentiometers
 Valve Position Sensors
 Knob Position Sensors
TMR3001
Operation
A small magnet, placed above the TMR3001, can be used to provide a magnetic field in any desired orientation parallel to the
plane of the TMR3001 package. The magnetic field is detected by TMR sensors in the TMR3001 that are composed of two
magnetic layers. One layer of the TMR sensors is a “pinned layer” that is not affected by the magnetic field, and the other is “free
layer,” which has a magnetization that aligns parallel to the applied magnetic field. Because the TMR effect produces a resistance
that is proportional to the sine or cosine of the relative difference between the free and pinned layer magnetization orientations,
the sensor output voltage is sinusoidally dependent on the angle of the applied magnetic field, thereby providing a measure of the
orientation of the magnet.
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