NAL MRA 1426/1427 GMR Magnetic Sensor

The MRA 1427/1426 magnetic sensor utilizes Giant magnetoresistive (GMR) technology, where highly sensitive unshielded GMR elements are configured in a form of single Wheatstone bridge. The Wheatstone bridge generates a differential output voltage with
respect to magnetic field gradient along the sensor’s sensitive direction. Each resistor has 4-5 kΩ nominal resistance and output of the bridge is purely ratiometric with the power supply voltage. Due to our unique technology and design, MRA 1427 is highly sensitive and has the ability to detect signals at the wide airgap. The excellent thermal and voltage stability makes it suitable for challenging environments. The MRA 1427 GMR sensor available in 8T-DFN package with dimensions 3 mm x 3 mm x 0.75 mm.

• Gear tooth speed sensing
• Direction and motion sensing
• Linear and rotary speed sensing
• Linear and rotary position sensing

Chip type                                         :            8T DFN package
Sensing element configuration           :            Wheatstone bridge configuration
Bridge resistance                             :            6.4±5% kΩ
Input voltage                                   :            1-30 V
Field Range                                      :            5-100 G, unipolar
Saturation of GMR Sensor Elements   :           ±300 G
Single Resistor Sensitivity                 :           0.033%/G
Temperature Coefficient of Resistance :          0.033 Ω/°C
Temperature dependence of GMR       :          -0.03%/ °C
Operating Temperature Range           :          -70 to 130 °C