MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCH

The A3212 integrated circuit is an ultra-sensitive, pole in de pendent Hall effect switch with a latched digital output. This sensor is es pe cial ly suited for operation in battery-operated, hand-held equip ment such as cellular and cordless tele phones, pagers, and palmtop com put ers. A 2.5 volt to 3.5 volt operation and a unique clocking scheme reduce the average operat ing power requirements to less than 15 µW with a 2.75 volt supply.

FEATURES
■ Micropower Operation
■ Operation with North orSouth Pole
■ 2.5 V to 3.5 V Battery Operation
■ Chopper Stabilized
   Superior Temperature Stability
   Extremely Low Switch-Point Drift
   Insensitive to Physical Stress
■ ESD Protected to 5 kV
■ Sol id-State  Reliability
■ Small Size
■Easily Manufacturable with Magnet Pole Independence