GMRB6 Datasheet, PDF (2/4 Pages) Infineon Technologies AG – Giant Magneto Resistive Position Sensor

GMR B6
The GMR B6 is an angle sensor based on sputtered metallic multilayer technology.
4 resistors are monolithically integrated on 1 chip. They can be used as a fullbridge or,
if 2 external resistors are added, as 2 halfbridges. 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 T_C (R, ∆R) is possible.
N
S
GMR B6
1
0.5
V₄
0
V₁
-0.5
V₁- V₄
-1
0
90
AED02956
180
270 Deg 360
Angle
Figure 1
Output Voltage of Half Bridges (V1, V4) and Full Bridge (V4 - V1) as a Function of
the Magnetic Field Orientation
Data Sheet
2
2000-07-01