NVE Introduces Low-Field Angle Sensor
New sensor operates with magnetic fields as low as 15 oersteds

EDEN PRAIRIE, Minn.—February 1, 2017—NVE Corporation (Nasdaq: NVEC) today announced the introduction of the AAT006-10E Low-Field Tunneling Magnetoresistance (TMR) Angle Sensor, a high-output magnetic sensor for angle measurements based on rotating magnetic fields. The new angle sensors operate at magnetic fields as low as 15 oersteds, allowing an extremely wide airgap tolerance.

AAT-Series Operation

AAT-Series Sensor output voltages are much larger than other sensor technologies. Typical applications include rotary encoders, and motor shaft position sensors, and Internet-of-Things end nodes.

The AAT006 has 1.5 megohm device resistance for low power consumption, and can run on a single button cell or harvested power. Harvested power can be intermittent, and AAT-Series sensors detect and maintain absolute position information, and immediately power up in the correct position after power is restored.

Other AAT006 features include:
  • 0.5 degrees maximum angular measurement error with fixed magnetic bias
  • 200 mV/V peak-to-peak output signals
  • Sine and cosine outputs for direction detection
  • Ultraminiature 2.5 mm x 2.5 mm x 0.8 mm TDFN6

AAT-Series sensors use unique Tunneling Magnetoresistance (TMR) elements for large signals and low power consumption.Also known as Spin-Dependent Tunneling (SDT), Magnetic Tunnel Junction (MTJ), or Tunneling Magnetic Junction (TMJ), Tunneling Magnetoresistance is a spintronic quantum effect that produces a dramatic resistance change in a normally insulating layer, depending on the magnetic field and thus the predominant electron spin in a free layer.

The sensors provide sine and cosine signals defining the angle of rotation. Outputs are proportional to the supply voltage and peak-to-peak output voltages are much larger than conventional sensor technologies. Because they are resistive devices with no active components, AAT-Series sensors have no minimum voltage and can be powered from single cells.

The other three members of the AAT Angle Sensor family have 30 oersted minimum operating fields. The AAT001 also has a 1.25 megohm typical device resistance; the AAT003 is 40 kilohms, which is ideal for direct interface to microcontrollers; and the AAT009 is 6 megohms for ridiculously low power consumption.

Available now, AAT006-10E Low-Field Angle Sensors are priced at $1.94 each in 1,000-piece quantities. Datasheets and more information are available at www.nve.com.

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.