NVE's revolutionary family of Tunneling Magnetoresistance (TMR) magnetic switches
integrates TMR sensor elements with threshold comparitors for precise swtching
and ultralow power.
We recently expanded our product line with two high-sensitivity versions, the
The new versions provide magnetic operate points as low as 1.5 mT.
Ideal for Battery Operation
ADT-Series sensors operate from 2.4 to 4.2 volts, which is ideal for lithium
primary cells, lithium-ion rechargeable batteries, or 3.3-volt supplies.
TMR technology provides ultralow power. Typical quiescent supply current is just
0.6 microamps, even with no duty cycling. Thats less than the self-discharge
rate of lithium batteries, making the new sensors ideal for applications such
as utility meters or portable instruments.
Continuous operation allows fast switching (20 kilohertz) and avoids switching
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 field can be either polarity,
and the magnetic operate point is extremely stable over supply voltage and temperature.
ADT sensors are in a 1.1 by 1.1 by 0.35 millimeters (0.043 by
0.043 inch) ULLGA package.
Demonstration Board has an ADT923-14E sensor and an LED to show the
sensor output. It is is powered by a three-volt lithium coin cell (included).
The sensors low quiescent power allows the battery to last at least several
years with occasional LED use. A miniature bar magnet is included to activate
the sensor. The board is just 1.57 by 0.25 inches (40 by 6 millimeters).