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“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.
Link
to Paper » |
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“The Future of
Advanced xMR Sensors”
(in cooperation with Angst+Pfister)
September 19, 2024
Link
to Webinar » |
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Magnetometer
Proximity Sensing |
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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 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 |
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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.
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
This video shows two modes of proximity sensing with an ultrahigh-sensitivity
magnetic sensor:
In Stock
The new sensors and breakout boards are in
stock for immediate delivery.
Download
the Datasheet »
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Direct
Microprocessor Interface
to ALT-Series Sensors |
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ALT-Series sensor outputs
can be connected directly to microcontroller analog inputs:
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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