Summary of the technology
The MRA 1427/1426 magnetic sensor utilizes Giant magneto-resistive (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 45 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 air gap. 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.
Salient Technical Features
- Chip type: 8T DFN package
- Sensing element configuration: Wheatstone bridge confgiruation
- 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: 0.033Ω/oC
- Temperature dependence of GMR: 0.03%/oC
- Operating Temperature Range: 70 to 130 oC
Application / Uses
- Gear tooth speed sensing
- Direction and motion sensing
- Linear and rotary speed sensing
- Linear and rotary position sensing
Major Plant Equipment and Machinery Required
- Class 1000 clean room, Industrial sputtering system for sensor deposition, Photolithography equipments and Mask aligner.
Major Raw Materials to be Utilized
- High purity targets of CoFe and Cu, Si wafers, gases, photolithography chemicals.
Available in Market
- Available with Jayashree Electron Pvt. Ltd. For automobile applications
Commercialization and Type of License (exclusive or non-exclusive):
Ready for commercialization
Level/Scale of Development:
TRL-8, scaled to 4inch Si wafer
As per the market analysis , the overall magnetic revolution sensor market revenue would be 279 million US$ with a corresponding volume of 1347 million units by the year 2016.
Year of Development:
Patent filed in India, 3689/DEL; 1221/DEL; 449/DEL
Steinbeis Centre for Technology Transfer India
Technology Transfer Office
Additional information (attached documents)