The KMA36 universal magnetic encoder from Measurement Specialties, Inc. seamlessly combines a magnetoresistive sensor array with an analog-to-digital converter and signal processing in a compact TSSOP package.
Using an Anisotropic Magneto Resistive (AMR) technology, the contactless sensor measures the incremental positions along a 5 mm linear magnetic pole strip and magnetic field angle of an external magnet in a 360° rotation. Data communication, analog signal output and configuration can be easily accessed through TSSOP pins. Featuring a self-diagnostic sequence at power, the software allows the electronic circuit to be tested prior to integrating it into the assembly as well as during field use. It also signals failures and faults to the system it interfaces with. With the sensor’s power down and sleep modes, the device can also be set to low power mode.
The KMA36 universal magnetic encoder does not only replace the less precise Hall-effect position sensors but also the more fragile optical encoders which feature bearings that are often subject to failure. Specifically designed with a sleep and low power mode as well as an automatic wake-up in I2C mode, the KMA36 allows position data to be transmitted using two-wire (SCL, SDA) communication bus or PWM.
The sensors can withstand temperature changes, dirt, dust and similar contaminants. Primary applications include engine and vehicle environments, harsh industrial uses, machine tools, control of handling machines, motor motion and robotics. They can also be used in selected laboratory, medical and conveyor instrumentation.
Measurement Specialties, Inc.
Filed Under: Motion Control Tips, Bearings, Encoders • optical