We have expanded our
industry-leading family of magnetic switches with high-sensitivity versions of
our ADT9xx-Series Tunneling Magnetoresistance (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. Thats 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.
Configured as Switches
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.
In Stock Four ADT9xx-Series parts are now available:
Demonstration Board has an ADT923-14E sensor and an LED to show the
sensor output. It 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 x 6 mm).