NVE Sensor and Isolator News
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    September 10, 2024 Electrifying  News  From  NVE
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In This Issue
Magnetometer Proximity Sensing

Microprocessor Interfaces
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Quick Links
Sensor Selector Guide

Isolator Cross Reference

Online Store

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New on YouTube
Two Magnetic Proximity Sensing Configurations
Metal Distance Sensing with a New Ultrahigh-Sensitivity Magnetic Sensor
Precision Proximity Sensing with a New TMR Sensor
World’s Fastest Isolators—Newly Upgraded to 7 kV Isolation
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In the News
NVE Ranked as the Strongest U.S. Semiconductor Company
RealRate, Sept. 6, 2024
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Recent Papers
“Real-time biomolecule detection using GMR chip-based sensor”
(an AAL024 sensor combined with an Arduino is used to detect blood proteins.)
Sensors and Actuators A: Physical, Sept. 1, 2024.
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Upcoming Webinars
The Future of Advanced xMR Sensors
(in cooperation with Angst+Pfister)
Sept. 19, 2024
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Magnetometer Proximity Sensing
 
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:
 
Two Proximity Sensing Configurations
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.
ALT02x Equivalent Circuit
 
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
ALT002-14E-EVB01
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
This video shows two modes of proximity sensing with an ultrahigh-sensitivity magnetic sensor:

Magnet and Biased Proximity Sensing

 
In Stock
The new sensors and breakout boards are in stock for immediate delivery.
 
Buy Online
 
Download the Datasheet »
 
Direct Microprocessor Interface
to ALT-Series Sensors
 
ALT-Series sensor outputs can be connected directly to microcontroller analog inputs:
 
Trinket
 
It takes just one line of code to read the sensor:
   sensor=analogRead(2)-analogRead(1); // Pin #4=2; pin #2=1
 
A microcontroller analog output provides an amplified, single-ended, PWM version of the sensor value:
   analogWrite(0,sensor); // 4x amplified output
 
The gain of four is because the microcontroller has a 10-bit ADC and an 8-bit DAC, so full scale is shifted by two bits.
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