Description
AMR4100 is based on the principle of anisotropic
magnetoresistance (AMR), and its output voltage
changes with the direction of the magnetic field
(target magnetic field) received. The AMR4100
outputs two sets of analog voltage signals (sine and
cosine) with a phase difference of 45° when the
magnetic field direction rotates one circle. The period
of these two sets of analog voltage signals is twice
the rotation period of the magnetic field direction.
The angular position information of the target magnetic
field can be determined in real time by calculating
the two sets of analog voltage signals.
Through the optimized design, the temperature drift
of the AMR4100 is effectively compensated, the
measurement accuracy of the sensor in various
application environments is improved, and the
limitation for the installation distance between the
measured object and the sensor is reduced. It is
available in the compact DFN12L(6 mm × 2 mm ×
0.75 mm) packages and easy to assemble in tight
spaces.

Features and benefits
•• Anisotropic magnetoresistance (AMR) technology
••Wide operating voltage range (up to ±9 V)
•• Sine/cosine signal output (differential analog signal)
•• Excellent thermal stability
•• High accuracy (absolute accuracy 0.1º)
•• RoHS & REACH compliant

Applications
•• Linear displacement sensing
•• Length measurement
•• Linear encoder
•• High speed rotation encoder
•• Angular displacement sensing
•• Knob sensor