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