TMR3004 Datasheet, PDF (1/5 Pages) American Electronic Components, inc – TMR High Magnetic Field Dual-Axis Anlge Sensor

Datasheet V1.0a
TMR3004
TMR High Magnetic Field Dual-Axis Angle Sensor
General Description
The output voltages of the dual-axis TMR3004 TMR high-field angle sensor are proportional to the sine and cosine of the angle of
a magnetic field applied parallel to the surface of the TMR3004.These sine and cosine signals are provided by two orthogonal full
bridge TMR angle sensors. Each full bridge TMR angle sensor includes four unique high-field TMR sensor arms connected 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, while maintaining low error as the magnetic field is varied over a range of 1 kOe.
Additionally, the TMR full 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
 High Magnetic Field Tunneling Magnetoresistance (TMR)
Technology
 Wide 1 KOe Operating Range Provides Highest Air Gap
Insensitivity
 Excellent Immunity to Environmental Magnetic Disturbance
 Large Output Signal without Amplification
 High Accuracy Dual-Axis360°Angle Measurement
 Compatible with Wide Range of Supply Voltages
 Fast Response for High-Speed Applications
 Excellent Thermal Stability
 Compact LGA Package
Applications
 Rotary Position Sensors
 Rotary Encoders
 Contactless Potentiometers
 Valve Position Sensors
 Knob Position Sensors
TMR3004
Operation
A small dipolar magnet, placed above the TMR3004, can provide a magnetic field in any desired orientation parallel to the plane
of the TMR3004 package. The magnetic field is detected by the TMR sensors in the TMR3004 which are comprised of two
ferromagnetic layers. One layer 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 true 360°measure
of the orientation of the magnetic field.
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