TMR4004 TMR Geartooth Sensor
Part No.: TMR4004
Previous Part No.: MMG245D
Single / Double Full: Double Full
Supply Voltage (V): 0~7 V
TMR Element Spacing (mm): 0.5
Gear Tooth Pitch Range:

optimal pitch at 1.0mm

Resistance (kΩ): 7.5
Saturation Field (Oe): ±70
Sensing Direction: X-axis
Form Factor: LGA6L(3x3x0.9)
Lead Time: In stock
  • TMR4004

General Description:The TMR40xx series of geartooth sensor adopts a unique push-pull Wheatstone bridge design. This design includes a single-channel or dual-channel Wheatstone full bridge composed of four or eight unshielded high-sensitivity tunneling magnetoresistance (TMR) sensing elements. The Wheatstone bridge provides a differential voltage output along the gradient of the applied magnetic field along the sensor's sensing direction.

The dual-channel Wheatstone full bridge generates two orthogonal sine/cosine voltage output signals to measure the position of the gear rotation and detect the direction of rotation. The high-sensitivity performance of the TMR40xx series enables detection of small magnetic field changes, and its output signal has good temperature stability.

TMR40xx series provides multiple configuration of TMR sensing element spacing: 0.25mm, 0.4mm, 0.5mm, 0.6mm, 0.75mm, 0.8mm,1.0mm,1.2mm,1.4mm, 1.6mm, 2.0mm, and 3.0mm. It is available in two compact LGA packages with dimensions of 3mm×3mm×0.9mm and 3mm×6mm×0.9mm.

Features and Benefits:(1)Tunneling magnetoresistance (TMR) technology;(2)High saturation field allows operation in large DC magnetic field;(3)High sensitivity to magnetic gradient;(4)Compatible to small pitch gear measurement;(5)Sine/cosine signal output with accurate phase difference;(6)Excellent resistance to external magnetic field interference.


Applications:(1)Wide air gap tolerance;(2)DC (zero speed) operation;(3)Excellent thermal stability;(4)Compact package.


The information provided herein by MultiDimension Technology Co., Ltd. (hereinafter MultiDimension) is believed to be accurate and reliable. Publication neither conveys nor implies any license under patent or other industrial or intellectual property rights. MultiDimension reserves the right to make changes to product specifications for the purpose of improving product quality, reliability, and functionality. MultiDimension does not assume any liability arising out of the application and use of its products. MultiDimension’s customers using or selling this product for use in appliances, devices, or systems where malfunction can reasonably be expected to result in personal injury do so at their own risk and agree to fully indemnify MultiDimension for any damages resulting from such applications.

“MultiDimension”, “MultiDimension Sensing the Future”, and “MDT” are registered trademarks of MultiDimension Technology Co., Ltd.

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