The TMR4M02B/3B/4B/5B/8B geartooth sensors are
composed of a dual-channel push-pull Wheatstone
full bridge including eight high-sensitivity tunneling
magnetoresistance (TMR) sensing elements. The
placement of TMR sensing elements is designed for
specific gear pitches in different gear modules. The
dual-channel Wheatstone full bridge outputs two
orthogonal sine and cosine signals with the rotation of
the gears. The period of this signal equals to the gear
pitch to measure the rotation position and direction of
the gear.
The TMR4M02B/3B/4B/5B/8B series are available
in the compact LGA6L (3 mm × 6 mm × 0.9 mm)
packages, with different configurations of gear pitches
in following gear modules:
• TMR4M02B: module 0.2
• TMR4M03B: module 0.3
• TMR4M04B: module 0.4
• TMR4M05B: module 0.5
• TMR4M08B: module 0.8
Description

Tunneling magnetoresistance (TMR) technology
Adapt to gears of different modules
High saturation field
DC (zero speed) operation
Sine/cosine signal output with accurate phase
difference
Excellent thermal stability
Excellent resistance to external magnetic field
interference
RoHS and REACH Compliant
Features and benefits
Applications
Gear speed and direction measurement
Linear and angular speed sensing
Linear and angular displacement sensing