TMR401X Datasheet, PDF (1/6 Pages) American Electronic Components, inc – TMR Geartooth sensor with high sensitivity to magnetic field gradient

DatasheetV1.0a
TMR401X
TMR Gear tooth sensor with high sensitivity to magnetic field gradient
General Description
The TMR401X 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 TMR401X 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 TMR401X magnetic gear tooth sensors are available in 8 different standard spacings of 0.4mm, 0.6mm, 0.8mm, 1.0mm,
1.2mm, 1.4mm, 1.6mmand 1.8mm. Three types of small form factor LGA packages are available. The package dimensions are
3mm × 3mm × 0.9mm, 3mm × 6mm × 0.9mm.
Features and Benefits
 Tunneling Magnetoresistance (TMR) Technology
 High Saturation Point Allowing Operation under Large DC
Magnetic Field
 Wide Air-Gap Tolerance
 High Sensitivity to Magnetic Field Gradient
 Capable of Small-Pitch Gear Tooth Detection
 DC(Zero-Speed) Operation
 Sine/Cosine Signal Outputs with Precise Phase Shift
 Excellent Thermal Stability
 Good Immunity to Environmental Magnetic Field
 Compact Ultra-Thin Package
Applications
 Gear Tooth Motion, Speed, and Direction Sensing
 Linear and Rotary Speed Sensing
 Linear and Rotary position Sensing
 Linear Magnetic Scales
 Magnetic Encoders
TMR400X
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