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