Description
The AMR40X0 series magnetic grate sensors
integrate two push-pull Wheatstone bridges, each
of which contains four high-sensitivity anisotropic
magnetoresistance (AMR) sensing elements. Such a
design effectively compensates temperature drift to
ensure high accuracy under wide temperature range.
As the AMR40X0 moves along the magnetic scale,
sensor outputs two orthogonal sets of analog voltage
signals (sine and cosine), the period of which
corresponds to the scale’s magnetic pole pitch. The
relative displacement of the sensor and the scale
can be accurately determined by calculating the two
sets of analog voltage signals. The AMR40X0 series
have been designed with internal sensor elements
close to the surface of the package to reduce
limitations on airgap. Combined with the already
small DFN12L (6 mm × 2 mm × 0.75 mm) package,
the AMR40X0 series give greater responsibility to
system design and ease of assembly in tight spaces.

Features and benefits
•• Anisotropic magnetoresistance (AMR) technology
••Wide range supply voltages
•• Large airgap tolerance
•• Low saturation field
•• Phase A and phase B analog output
•• Excellent temperature stability
•• High tolerance to external magnetic field interference
•• RoHS & REACH compliant

Applications
•• Incremental or absolute encoder
•• Linear or angular displacement encoder
•• Magnetic scale and magnetic encoder