Description
The AMR134x is a digital omnipolar magnetic switch
that integrates magnetoresistance and CMOS
technology to provide a magnetically triggered digital
switch with high sensitivity, high speed, and low power
consumption. It is designed for pneumatic cylinder
position sensing in industrial applications.
It contains a full-bridge push-pull anisotropic
magnetoresistance (AMR) sensor and CMOS signal
processing circuitry within the same package, including
an on-chip voltage generator and voltage amplifier
and comparator for precise magnetic sensing, plus
a Schmitt trigger to provide switching hysteresis
for noise rejection, and CMOS push-pull output. An
internal band gap regulator is used to provide a
temperature compensated supply voltage for internal
circuits, permitting a wide range of supply voltages.
The AMR134x operates in low voltage and draws
only 40 μA resulting in low power operation. It has
fast response, accurate switching points, excellent
thermal stability, and immunity to stray field interference.

Features and benefits
• Anisotropic magnetoresistance (AMR) technology
• Low power consumption: 40 μA
• Power cycling latching switch
• Fast switching frequency: typ.1 kHz
• Omnipolar operation
• High sensitivity
• Wide range of supply voltages
• Excellent temperature stability
• High tolerance to external magnetic field interference

Applications
• Pneumatic cylinder position switches