NVE Launches AHK991 High-Field TMR Magnetic Switch
EDEN PRAIRIE, Minn.December 9, 2019NVE Corporation today announced
it is launching the unique AHK991-14E high-field, low voltage, low power, Tunneling
Magnetoresistance (TMR) magnetic switch.
The new sensors have a 350 millitesla (3500 oersted) typical operate point, which
is high enough to detect MRI fields or strong, rare-earth magnets in close proximity
that disrupt lower-field sensors. The sensors can withstand unlimited fields without
being damaged or turning off.
The digital output turns on and off as field intensity varies. Unlike Hall effect
or other sensors, the switch is sensitive to magnetic fields in any direction,
so multiple sensors are not needed for orthogonal or unknown directions of applied
AHK991 sensors operate as low as 0.9 volts, so they can be powered by single-cell
TMR technology provides ultralow power. Typical AHK991 quiescent supply current
is just 2 microamps, even with no duty cycling. That's less than the self-discharge
rate of some button cells, making the new sensors ideal for battery applications
such as utility meters or portable instruments.
Configured as Switches
Outputs are configured as magnetic "switches," turning on when a magnetic
field is applied and off when the field is removed. The magnetic operate point
is extremely stable over supply voltage and temperature.
Continuous operation without duty cycling means the sensors can switch at 3000
AHK991 sensors come in ultraminiature 1.1 x 1.1 x 0.35 mm ULLGA-4 packages.
350 mT operate point
0.9 to 1.8 V
2 µA typical supply current
3000 Hz switching speed
-40 to 85°C
AHK921-14E sensors are are in stock for immediate delivery, and priced at $3.83 each
in 1000-piece quantities.
Click here to download the AHK921
datasheet, or visit www.nve.com for more
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.
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.