NVE Introduces New Smart TMR Magnetometer
Fast, accurate sensor is ideal for proximity or AC current
EDEN PRAIRIE, Minn.May 29, 2019NVE Corporation today announced the
SM225-10E high-speed Tunneling Magnetoresistance (TMR) Smart Magnetometer. The
new part is ideal for measuring proximity or AC current, and for providing information
for the Industrial Internet of Things.
The new sensor combines a unique TMR sensor element with elegant digital signal
processing. A high-speed Serial Peripheral Interface (SPI) interface provides
access to sensor data and programmable parameters.
Key SM225-10E features and specifications are summarized as follows:
Wide 0 to 150 Oe / 0 to 15 mT linear range
Can detect magnets more than 50 mm away
Fast SPI interface
2% of full-scale accuracy for 0 to 125°C
Fast 15000 samples per second update rate
Programmable offset and gain compensation
-40°C to 125°C operating range
Ultraminiature 2.5 x 2.5 mm TDFN package
Convenient Magnetic Orientation
Unlike awkward, old-fashioned Hall-effect sensor elements, NVE smart magnetometers
use spintronics such as TMR, which are sensitive in-plane for optimal current
sensing and easy mechanical interfaces.
The SM225 is the most accurate high-speed magnetometer in its class, with a total
accuracy specification of two percent of full-scale over a 0 to 125 degrees
Celsius operating temperature range and four percent over the full minus
40 to 125 degrees Celsius operating range. Accuracy is specified as a percentage
of the SM225s full-scale range of 150 oersteds or 15 millitesla.
The accuracy specification cover all error sources, including sensitivity, offset,
nonlinearity, hysteresis, noise, and supply variation.
The SM225 has a sensor element bandwidth of 7.5 kHz and an update speed of
15000 samples per second, making it the fastest magnetometer of its type, and
ideal for noncontact AC current sensing.
With their 2.5 by 2.5 by 0.8 millimeter leadless TDFN packages,
NVE smart magnetometers are the smallest magnetometers with microcontroller interfaces
in the industry.
The AG953-07 Evaluation Kit has everything needed to evaluate the SM225-10E. The
Kit includes an evaluation board with an SM225-10E sensor and a microcontroller
with a USB interface. A current-carrying trace under the sensor allows evaluation
as a current sensor.
SM225-10E Smart Magnetometers are priced at $1.65 each in 1000-piece quantities.
The AG953-07 Smart Magnetometer Evaluation Kits are $95.00 each. Sensors and kits
are in stock for immediate delivery.
Click here to download the SM225
datasheet, or visit www.nve.com for more
A Family of Smart Magnetometers
The SM225 is the third member of NVEs groundbreaking smart magnetometer
line, joining the general-purpose SM124 and the ultra-accurate SM324.
Leaders in Practical Spintronics
NVE is a leader in the practical commercialization of spintronics, a nanotechnology
that relies on electron spin rather than electron charge to acquire, store and
transmit information. The company manufactures high-performance spintronic products
including sensors and couplers that are used to acquire and transmit data. NVE
has also licensed its spintronic magnetoresistive random access memory technology,
commonly known as MRAM.
Statements used in this announcement that relate to future plans, events, or
performance are forward-looking statements that are subject to certain risks and
uncertainties including, among others the risk factors listed from time to time
in our filings with the SEC, including our Annual Report on Form 10-K and other
reports filed with the SEC.