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Upcoming
Papers
About NVE Magnetometers |
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“Real-time Biomolecule
Detection Using GMR Chip-based Sensor with Green-synthesized Fe3O4/rGO Nanocomposites
as Magnetic Labels.”
(an AAL024 sensor in a biosensor system.)
Journal Pre-proof, Sensors and Actuators A: Physical, May 18, 2024.
“Exploring Biomagnetism for Inclusive Vital Sign Monitoring: Modeling and
Implementation.”
(an AA004 sensor is used to detect heartrate and respiration in a smartwatch.)
To be presented at ACM MobiCom 2024, Oct. 2024.
Application
Papers » |
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Expanded
TMR Magnetometer Line |
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NVE has expanded its
industry-leading line of ALT-Series Tunneling Magnetoresistance (TMR) analog magnetometers
with the new ALT026-10E.
The new version has a 20 mT linear range, which is the widest in the Series.
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ALT-Series
sensors’
bipolar transfer function |
Bipolar Output
ALT-Series sensors have a unique bipolar output to detect both magnetic field magnitude and polarity;
the output is positive for positive magnetic fields and negative for negative magnetic fields.
Specifications
• High sensitivity (up to 500 mV/V/mT)
• Large signals (200 mV/V typical full-scale)
• Flexible 0 to 10 V supply (no minimum)
• 20 kiloohm device resistance for low power
• High linearity (1% of full-scale)
• Ultra-low output temperature coefficient (±0.1%/°C)
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A differential
bridge
analog output |
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• Up to 300 kHz
bandwidth
• –40 to 125 °C operating range
• 2.5 x 2.5 mm DFN6 package
Applications
• Proximity sensing
• Magnetic pickups
• Motion, speed, and position control
• Ferromagnetic material detection
• Flow sensing
• Geomagnetic navigation
• Noncontact current sensing
• Wearables
• Mechatronics and robotics
Evaluation Boards
The 0.8 x 0.4 inch (21 x 10 mm) breakout boards have pre-soldered sensors, footprints
for standard 0.1" (2.54 mm) headers, and common, 1 mm pitch card-edge connectors.
Five Versions
There are now five ALT-Series
TMR magnetometer versions:
Wide Sensing Range
The expanded ALT-Series covers a wide range of magnetic fields:
Demonstration Video
This video unboxes an ALT026 evaluation board and shows the sensor’s remarkable range:
In Stock
All ALT-Series
part types are in stock for immediate delivery.
Download
the ALT-Series Datasheet »
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Application
Corner |
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Magnetometers
as Magnetic Switches
A simple comparator circuit
can be used with a magnetometer
to create a magnetic switch. Since the sensor has a bipolar magnetic response,
the comparator only switches with a large enough field of the correct polarity:
The R1/R2 ratio sets the threshold,
and positive feedback from R2b adds hysteresis. The relatively large resistors
prevent loading the bridge, and the matching preserves the sensor bridge’s
inherent cancelation of temperature and power supply variations. |
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