Hall Effect Switch from Allegro MicroSystems
Allegro MicroSystems Inc.
January 10, 2008
The A7717 from Allegro MicroSystems Inc., Worcester, MA, is an ultrasensitive Hall effect switch with latched digital outputs and unipolar or omnipolar actuation. Features include 1.65–3.5 V operating supply voltage, 2 by 1.5 by 0.4 mm package size, push-pull complementary outputs, and a clocking algorithm to assist in reducing the average operating power consumption (<15 µW with a 2.75 V supply). In default mode, the device will actuate output switching with either a north or south polarity magnetic field of sufficient strength. You can also set the polarity-specific actuation.
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