Giant Magneto Resistive Position Sensor

The GMR S 4 is an angle sensor based on sputtered metallic multilayer technology. The outstanding feature of this magnetic sensor is the fact that it is sensitive to the orientation of the magnetic field and not to its intensity as long as the field is in a range between 5 … 15 kA/m. This means, the signal output of this sensor is independent of the sensor position relative to the magnet in lateral, axial or rotational direction in the range of several millimeters. Optimum results are achieved by using magnetic targets like permanent magnets or magnetic pole-wheels. There is no need for a biasing magnet! Due to the linear change of both, basic and field dependent part of the resistance vs. temperature, simple and efficient electronic compensation of TC (R, ∆R) is possible.

FEATUREs
• GMR sensor on copper leadframe
• Sensitive to the direction, not to the intensity of the magnetic field
• Constant TC of basic resistance R and magneto resistance ∆R

APPLICATIONs
• Rotation sensing with large air gaps according to sketch below
• Angle encoders
• Contactless potentiometers