Magnetic Field Sensors
Magnetic field sensors are devices that detect and measure magnetic fields around permanent magnets, current conductors, and electrical devices. As the world becomes increasingly electrified, demand for improved positional and current sensing has grown in turn. ADI MagIC+™ magnetic field sensors create more accurate and more space-efficient solutions that can operate with little to no power.
Analog Devices’ Magneto Resistive Sensing Technologies, signal conditioning capabilities, and deep domain expertise are enabling new, innovative, and high performance sensing solutions for both position and current measurements across a broad range of applications and markets.
What if we had the power to be powerless? It’s not a contradiction, but it may as well be magic. ADI MagIC+ is blurring the lines of what we previously thought to be possible in the realm of magnetic field sensors.
Magnetic Field Sensing Solutions
Position Sensors and Current Sensors
POSITION SENSORS
Position sensors are available in two configurations: single-turn and multiturn. As the name suggests, the single-turn position sensor measures a single rotation, while the multiturn sensor can measure multiple rotations, even in the absence of power. Below are some advantages and possible applications for each type of position sensor.
Single-Turn Sensor
Key Benefits in Motor Commutation Applications
- Reduced motor torque ripple
- Improved motor efficiency and smoothness
- Improved responsiveness
- Lower system power and reduced heat
Both Linear and Rotary Arrangements Are Possible
Rotary Position: End of Shaft
Rotary Position: Off-Shaft
Industrial Applications
- Servo drives
- Process control equipment
- Factory automation equipment
Automotive Applications
- Starter generator motor (SGM)
- Electrical power steering (EPS)
- Electrical braking
Featured Products
Multiturn Sensor
Key Features
- Measures multiple rotations in the absence of power
- First “true power-on” single chip multiturn position sensor
- Measurement range: 46 turns (0 to 16,560°); clockwise and counterclockwise
Simplified solution that eliminates the needs for:
- Backup battery + memory + single-turn sensor
- Continuous power + memory + single-turn sensor
- Mechanical reduction gearbox + single-turn sensor
- Linear position sensors or transducers
At a system level, this solution enables:
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Multiturn Solutions | System Size and Weight | Power Efficiency | ||
| Gear reduction mechanism + single-turn sensor or linear transducer | Large
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High
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| Continuous power + memory + single-turn sensor | Moderate
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Low
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| ADI Multiturn Solution | Small
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High
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Multiturn Sensor Applications
EPS Steer-by-Wire Actuator
- Tracks wheel movement during key-off; system knows wheel angle on key-on
- Simpler solution: eliminates requirement of complex systems to detect rack movement
Multiturn for Occupant Safety
- Measures seat-belt extension during key-off; occupant classification at key-on
- Provides continuous occupant dynamic position information
Automotive and Industrial Rotary to Linear Actuators
- Eliminates need for linear position sensors
Industrial Factory Automation
- Reduces downtime and increases factory efficiency
- Tracks robot joint motion during power loss, eliminates the need for homing and calibration or battery backup
Fill out our inquiry email for more information on ADI MagIC+ multiturn sensors, and to secure samples.
CURRENT SENSORS
ADI MagIC+ current sensors are based on next-generation techniques utilizing AMR platforms to enable new sensing technologies and deliver radical improvements over incumbent core-based Hall technology or CT-based solutions.
Advantages of ADI MagIC+ Current Sensors
SMALLER, THINNER, AND MORE ROBUST
- Flexible form factor
- Reduce solution thickness up to 7× compared to solutions with flux concentrators
LOW POWER OPERATIONS
- Up to 10× less power consumption compared to closed-loop sensors
HIGH DYNAMIC
RANGE
- High resolution measurements (>100 dB)
WIDE-BANDWIDTH SENSING
- MHz operation possible
- DC capable
- Zero offset
ADI MagIC+ current sensors operate on coreless AMR technology and thus achieve higher performance and mechanical robustness:
- High precision open-loop DC and AC measurement
- Highly integrated coreless solution with signal conditioning, temperature compensation, and coil drivers
- Wide magnetic flux density range up to ±8 mT
- Zero offset over temperature and life when chopped and flipped
- High bandwidth for fast response times
Analog Devices AMR platform enables both AC and DC measurement, without hysteresis and offset—critical capabilities not enabled by incumbent solutions.
Key Current Sensor Applications
- Absolute magnetic field measurement with high field range
- Current clamp meters
- General current measurement
Fill out our inquiry email for more information and to secure samples.
Latest Resources
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Multiturn Position Sensor Provides True Power-On Capabilities with Zero Power
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IBIS Modeling—Part 3: How to Achieve a Quality Level 3 IBIS Model Through Bench Measurement
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Dual AMR Motor Position Sensor for Safety Critical Applications
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Solutions Bulletin & Brochure
Webcast
Video
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- Steer by Wire: Loss of Power Doesn't Mean Loss of Vehicle Control
- Empowering the Intelligent Edge to Deliver more Sustainable Smart Manufacturing
- Efficient Motion Control using Magnetic Position Sensing Technology
- The World's First Single Chip Multiturn Position Sensor