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

A3213属于传感器，变送器 > 磁性传感器 - 开关（固态）。Allegro MicroSystems制造生产的A3213磁性传感器 - 开关（固态）该系列产品使用固态技术来检测是否存在超过某个特定幅度和/或标示的磁场，并提供指示是否存在此类磁场的双态输出。它们与磁簧开关以及线性或罗盘型固态器件不同，前者通过使用移动机械部件来提供类似的功能，后者提供指示所施加磁场的强度和/或方向的可变输出。