Datasheet

V1.0a

1/5

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

Applications

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.