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NVE expanded their industry-leading family of magnetic switches with high-sensitivity versions of their ADT9xx-Series Tunneling Magneto Resistance (TMR) sensors. The new versions provide magnetic operate points as low as 1.5 mT. The field can be either polarity, and the magnetic operate point is extremely stable over supply voltage and temperature. ADT-Series sensors operate from 2.4 to 4.2 volts, which is ideal for lithium or lithium-ion batteries and 3.3-volt supplies. TMR technology provides ultralow power. Typical quiescent supply current is just 1 µA with no duty cycling. That’s less than the self-discharge rate of typical lithium-ion batteries, making the new sensors ideal for battery applications such as utility meters or portable instruments. Continuous operation without duty cycling means the sensors are fast, and can switch at more than 20 kHz. Outputs are configured as magnetic “switches,” turning on when a magnetic field is applied and off when the field is removed. ADT sensors are in a 1.1 mm x 1.1 mm x 0.35 mm DFN4 package.
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.