a3212 is an ultra-sensitive hall effect switch with a latched digital output, suitable for use in battery-operated, handheld equipment such as cellular and cordless telephones, pagers, and palmtop computers.
The A3212 is a micropower, ultra-sensitive Hall-effect switch with a latched digital output, designed for battery-operated, hand-held equipment such as cellular and cordless telephones. It features pole independence, allowing either a north or south pole to turn the output on, and operates with a supply voltage range of 2.5V to 3.5V. The device utilizes chopper stabilization to ensure superior temperature stability and extremely low switch-point drift.
| Supply Current (Chip awake) | 2.0 mA |
|---|---|
| Operate Point (South pole) | 37 G to 55 G |
| Release Point (South pole) | 10 G to 31 G |
| Hysteresis | 5.9 G |
Yes, it is pole independent; either a north or south pole of sufficient strength will turn the output on.
The maximum junction temperature is +170°C.