A3213LLHLT Datasheet PDF - Allegro MicroSystems

MICROPOWER, ULTRA-SENSITIVE HALL-EFFECT SWITCHES

●The A3213xx and A3214xx integrated circuits are ultra-sensitive, pole independent Hall-effect switches with a latched digital output. They are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. A 2.4 volt to 5.5 volt operation and a unique clocking scheme reduce the average operating power requirements – the A3213xx to 825 µW, the A3214xx to 14 µW (typical at 2.75 V)! Except for operating duty cycle and average operating current, the A3213xx and A3214xx are identical.

●FEATURES

●■Micropower Operation

●■Operate With North or South Pole

●■2.4 V to 5.5 V Battery Operation

●■Chopper Stabilized

●   Superior Temperature Stability

●   Extremely Low Switch-Point Drift

●   Insensitive to Physical Stress

●■ESD Protected to 5 kV

●■Solid-State Reliability

●■Small Size

●■Easily Manufacturable With Magnet Pole Independence