Gear tooth sensor with high sensitivity

Featured Product from MultiDimension Technology Co., Ltd.

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TMR4001 TMR Gear tooth sensor with high sensitivity to magnetic field
The TMR400X magnetic gear tooth sensors utilize a unique push-pull Wheatstone bridge design, including one or two Wheatstone full bridges, with four or eight unshielded high sensitivity TMR sensing elements. The Wheatstone bridge creates a differential voltage output with respect to the magnetic field gradient along the sensor’s sensitive direction. In the dual-bridge configuration, the two orthogonal Wheatstone full bridges provide sine and cosine voltage signals that can be used to measure both the gear tooth position and the direction of motion. The TMR400X magnetic gear tooth sensors offer superior performance with high sensitivity to the magnetic field gradient. They can detect very small changes in magnetic field, along with good temperature stability of the output signal.

The TMR400X magnetic gear tooth sensors are available in 8 different standard spacings of 0.25mm, 0.5mm, 0.75mm, 1.0mm, 2.0mm, 3.0mm,4.0mm,and 5.0mm. Three types of small form factor LGA packages are available. The package dimensions are 3mm × 3mm × 0.9mm, 3mm × 6mm × 0.9mm,and 3mm × 8mm × 0.9mm.

Features and Benefits:
(1)Tunneling Magnetoresistance (TMR) Technology
(2)High Saturation Point Allowing Operation under Large DC Magnetic Field
(3)Wide Air-Gap Tolerance
(4)High Sensitivity to Magnetic Field Gradient
(5)Capable of Small-Pitch Gear Tooth Detection
(6)DC (Zero-Speed) Operation
(7)Sine/Cosine Signal Outputs with Precise Phase Shift
(8)Excellent Thermal Stability
(9)Good Immunity to Environmental Magnetic Field
(10)Compact Ultra-Thin Package.


Applications:
(1)Gear Tooth Motion, Speed, and Direction Sensing
(2)Linear and Rotary Speed Sensing
(3)Linear and Rotary Position Sensing
(4)Linear Magnetic Scales
(5)Magnetic Encoders.

MultiDimension Technology(MDT®) was founded in 2010 in Zhangjiagang, Jiangsu Province, China, with branch offices in Ningbo ,Shanghai, Chengdu China and San Jose, Calif., USA. MDT has developed an unique intellectual property portfolio, and state-of-the-art manufacturing capabilities that can support volume production of high-performance, low-cost TMR magnetic sensors to satisfy the most demanding application needs. Led by its core management team of experts in magnetic sensor technology and engineering services, MDT is committed to creating added value for its customers and ensuring their success. 
MDT ’s Service Options Include:

  • In-plane and Z-axis TMR sensors, which may be delivered as wafers, bare dice, or packaged devices
  • Custom design for TMR/GMR/AMR sensors
  • ASIC design for integration with TMR/GMR/AMR sensors
  • Foundry service for TMR/GMR/AMR sensors including thin-film deposition, device processing, packaging and testing
  • Custom sensor module design and application solutions
  • IP licensing, granting customers access to MDT ’s technology for use in their products