Magnetic Field Sensors

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.

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.

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Hall-Effect Sensor Interface

Analog Devices’ Hall effect magnetic field sensors combine integrated bulk Hall cell technology and instrumentation circuitry to minimize temperature related drifts associated with silicon Hall cell characteristics. The architecture maximizes the advantages of a monolithic implementation while allowing sufficient versatility to meet varied application requirements with a minimum number of components.

Magneto-Resistive Sensors

Magnetic sensing based on anisotropic magnetoresistance (AMR) position sensor solutions enables robust and accurate position sensing for encoder applications. Position feedback is used for direct position control or for inferring rotational speed and implementing machine speed control in servo drives. Magnetic sensing provides a lower cost solution compared to optical encoders and a more robust solution in industrial applications that are subject to dust and vibration.

Variable Reluctance Sensor Interface

Variable reluctance (VR) sensors are preferred for industrial and automotive environments because they withstand mechanical vibration and high temperature operation up to 300°C. In most applications, they sense a steel target that is part of a rotating assembly. Because the unprocessed signal amplitude is proportional to target speed, a sensor whose signal-processing circuitry is designed for high speed will cease to function as rotation slows. VR sensors like the MAX9924/MAX9927 have a coil to sense the speed and rotation of motors. Integrated VR-sensor interface solutions possess many advantages over other solutions, including enhanced noise immunity and accurate phase information.

What if we had the power to be powerless?

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.

ADAF1080

RECOMMENDED FOR NEW DESIGNS

Integrated 8 mT AMR Magnetic Field Sensor and Signal Conditioner

ADA4571-2

RECOMMENDED FOR NEW DESIGNS

Dual Integrated AMR Angle Sensor and Signal Conditioner

ADA4570

RECOMMENDED FOR NEW DESIGNS

Integrated AMR Angle Sensor and Signal Conditioner with Differential Outputs

ADI MagIC+ Multiturn Sensor

The unique true power-on multiturn technology offered by the ADI MagIC+ group can track rotations of a magnet without power or contact. This removes the need for battery backups, linear transducers or gearing in applications where motor rotations need to be measured in the absence of power. System advantages include eliminating the need for homing and calibration which can reduce factory downtime and cost, or provide robust safety features with a single chip solution.

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ADI MagIC+ Multiturn Sensor

The unique true power-on multiturn technology offered by the ADI MagIC+ group can track rotations of a magnet without power or contact. This removes the need for battery backups, linear transducers or gearing in applications where motor rotations need to be measured in the absence of power. System advantages include eliminating the need for homing and calibration which can reduce factory downtime and cost, or provide robust safety features with a single chip solution.

More Details

Magnetic Field Sensors