TMR analog magnetic sensors are revolutionizing proximity sensing. New high-sensitivity devices like the ALT002-14E detect smaller objects at greater distances with more precision than ever before.
Two Proximity Sensing Configurations
The ALT002-14E can be used for proximity detection of either permanent magnets or ferromagnetic objects like steel gears or pistons using a back biasing technique:
| Magnet Detection | Back-Biased Configuration |
In the magnet detection mode, the sensor detects the increasing field as a magnet approaches. With the back-biased configuration, a stationary magnet creates a bias field on the sensor. The field at the sensor increases as a ferromagnetic target approaches the sensor.
High Sensitivity
The ALT002-14E has a remarkable sensitivity of 200 mV/V/mT providing a typical output of 250 millivolts at 0.25 millitesla with a five-volt supply and no amplification.
Ultraminiature for Spatial Sensitivity
At just 1.1 mm x 1.1 mm, the ALT002-14E is the world’s smallest high-sensitivity magnetometer. The small size means unmatched spatial sensitivity and precision.
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Simple Interface
The sensors have just four connections, two for the output and two for power.
The outputs can be connected directly to ADC or microcontroller analog inputs, or simple amplifiers if necessary.
Breakout Board
A 0.8 x 0.4 inch (21 x 10 mm) breakout board has pre-soldered sensors, 0.1″ headers, and a 1 mm-pitch card-edge connector.
Demonstration Video