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Schanzenfeldstr. 2
35578 Wetzlar
GMR Sensorchips
Sensoren basierend auf dem GiantMagnetoResistiven Effekt
Sensitec GmbH
Schanzenfeldstr. 2
35578 Wetzlar
Sensoren basierend auf dem GiantMagnetoResistiven Effekt
As the following technology to AMR, GMR technology offers a few more degrees of freedom in stack and therefore system design. GMR sensors have been established for many years and, similar to TMR, offer a high degree of design flexibility. At Sensitec, this sensor technology is primarily used for scanning tooth structures. The technology is also used in the sector of biosensors and in some magnetic field sensors.
Below you will find a further selection of different GMR sensors.
The sensors of the GLM family are fixed pitch sensors based on the Giant MagnetoResistive (GMR) effect. The sensors were specially developed for use on ferromagnetic tooth structures. Therefore, a magnet is integrated into each sensor to stimulate the tooth structure.
This operating principle allows existing machine elements such as gears or threaded spindles to be used as measuring elements. These must be made of ferromagnetic material and have a tooth pitch that matches the pitch of the sensor.
No special tooth shapes are required. This means that the sensors can also be operated on a hole structure or a rectangular tooth structure.
Adapted to a tooth structure of 1 mm.
Technical documents
• Data sheet
• Data sheet Evalboard
Adapted to a tooth structure of 2 mm.
Technical documents
• Data sheet
• Data sheet Evalboard
Adapted to a tooth structure of 3 mm.
Technical documents
• Data sheet
• Data sheet Evalboard
Adapted to a tooth structure of 0.94 mm (Modul 0.3).
Technical documents
• Data sheet
• Data sheet Evalboard
Adapted to a tooth structure of 1.57 mm (Modul 0.5).
Technical documents
• Data sheet
• Data sheet Evalboard
Advantages
Applications
Product details
The GF705 is a magnetic field sensor based on the multilayer Giant MagnetoResistive (GMR) effect. The sensor contains a Wheatstone bridge with on-chip flux concentrators to improve sensitivity. The sensor is ideal for measuring magnetic fields in a linear range from 1.8 mT to 8 mT. A typical application is endpoint detection through a stainless steel cylinder: a moving magnet inside a thick-walled cylinder is detected from the outside by a GF705 sensor. The GF705 is available as a bond version (bare die) and as a flip chip or LGA housing for SMD mounting.
GMR Magnetic field sensor
Technical documents
• Data sheet
Advantages
Applications
Product details
The GF708 is a magnetic field sensor based on the GiantMagnetoResistive (GMR) effect. Its functional magnetic layer is embedded in a synthetic spin valve connected as a Wheatstone bridge. With its on-chip flux concentrators, an extremely high sensitivity can be achieved, resulting in an almost step-like bipolar transmission curve. This makes the sensor suitable for two important fields of application: Firstly, as a highly sensitive magnetic field sensor with a sensitivity of 130 mV/V/mT – secondly, the sensor can be used as an index sensor for encoders. Here, a single magnetic reference pole can be detected with high spatial resolution. The product is available as a bare die with gold connections. As a flip chip or integrated in a SIL6 or LGA housing, the component is suitable for SMD mounting.
Magnetic field sensor with stepped characteristic curve
Technical documents
• Data sheet
Advantages
Applications
Product details