Summary of NVE INTRODUCES SMART GMR MAGNETOMETER
NVE Corporation launched the SM124-10E Smart Magnetometer, a GMR-based sensor offering superior current and proximity detection compared to Hall-effect alternatives. It features factory calibration, single-byte data output for efficiency, and an ultraminiature package. The device supports I2C communication with no overhead and includes internal temperature compensation. An evaluation kit is available for testing and calibration purposes.
Parts used in the SM124-10E Project:
- SM124-10E GMR Smart Magnetometer
- AG952-07E Evaluation Board
- Microcontroller
- Regulated 3.3 volt supply
- Current-carrying trace
- Ceramic magnet
- USB cable
- Windows user interface software
NVE Corporation announced the new SM124-10E Smart Magnetometer. The new sensor combines a Giant Magnetoresistance (GMR) sensor element with elegant digital signal processing. The versatile product can be used for current or proximity measurements.
Unlike awkward, old-fashioned Hall-effect sensors, GMR is sensitive in-plane for optimal current sensing and easy mechanical interfaces.
A Slick, Elegant Data Structure
All data and parameters are input and output as single bytes (eight bits). This provides better than 1% precision while eliminating the need to concatenate upper and lower bytes.
No Communications Overhead
Data are always valid, so there is no need to wait for data during an I2C read, and there are no set-up commands or error handling required.
Factory Calibrated
The sensor is factory calibrated for sensitivity, offset, linearity, and temperature compensation. Users can also calibrate the output for a particular system.
Amazing Features
Key SM124-10E features include:
- Can detect magnets more than 50 mm away
- I2C and digital threshold outputs
- 7-bit output resolution
- In-plane sensitivity – more usable than Hall effect sensors
- Programmable offset and gain compensation
- Calibrated internal temperature sensor
- Internal temperature compensation
- Optional magnet temperature compensation
- 2.2 to 3.6 V supply
- Ultraminiature 2.5 × 2.5 × 0.8 mm TDFN package
- Evaluation Kit
AG952-07E Smart Magnetometer Evaluation Kit.
The simple AG952-07 Evaluation Kit has everything needed to calibrate, test, and evaluate SM124-10E Smart Magnetometers.
The kit includes:
- A 1-inch by 1.625-inch (25 mm by 41 mm) USB-powered evaluation board with:an SM124-10E GMR Smart Magnetometer
- a microcontroller connected to the sensor via I2C
- a regulated 3.3 volt supply to power the SM124-10E
- a current-carrying trace under the sensor for evaluating as a current sensor
- A small ceramic magnet for evaluating as a proximity sensor
- USB cable to connect the Evaluation Board to a computer
- Windows user interface software
Read more: NVE INTRODUCES SMART GMR MAGNETOMETER
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What makes the SM124-10E better than Hall-effect sensors?
GMR technology is sensitive in-plane for optimal current sensing and offers easy mechanical interfaces. -
Does the sensor require setup commands or error handling during I2C reads?
No, data are always valid so there is no need to wait or handle errors. -
How precise is the data output of this magnetometer?
The single byte output provides better than 1% precision. -
Can the SM124-10E detect magnets at a distance greater than 50 mm?
Yes, it can detect magnets more than 50 mm away. -
What power supply voltage range does the sensor support?
The sensor operates on a 2.2 to 3.6 V supply. -
Is the AG952-07E kit powered by USB?
Yes, the evaluation board is a USB-powered unit. -
Does the evaluation kit include software for Windows?
Yes, it includes Windows user interface software. -
What components are included in the AG952-07E Evaluation Kit?
The kit contains an evaluation board, microcontroller, supply, current trace, ceramic magnet, USB cable, and software.
