Description | |
The TMR4006 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 TMR4006 enables detection of small magnetic field changes, and its output signal has good temperature stability. The TMR4006 is available in compact LGA6L (3mm × 6mm × 0.9mm) package, with 2.0 mm of TMR sensing element spacing. | LGA6L |
Features and Benefits | |
Tunneling magnetoresistance (TMR) technology | High sensitivity to magnetic gradient |
High saturation field allows operation in large DC magnetic field | Compatible to small pitch gear measurement |
Sine/cosine signal output with accurate phase difference | Wide air gap tolerance |
Excellent resistance to external magnetic field interference | DC (zero speed) operation |
Excellent thermal stability | Compact package |
RoHS & REACH compliant | |
Applications | |
Gear speed and direction measurement | Linear and angular speed sensing |
Linear and angular displacement sensing | Magnetic scale |
Magnetic encoder |