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