The A3212 is a Schottky barrier Hall-effect switch consisting of a Schottky barrier, a drive amplifier, a decoder, an oscillator, a latch, and is used to measure the strength of the magnetic field.
The Allegro MicroSystems A3212 is an integrated circuit Hall-effect switch designed for low-power applications in battery-operated equipment. It features a latched digital output that is pole-independent, meaning either a north or south pole of sufficient strength will turn the output on. The device utilizes chopper stabilization to ensure superior temperature stability and extremely low switch-point drift.
| Supply Voltage Range | 2.5 V to 3.5 V |
|---|---|
| Output Leakage Current | < 1.0 mA |
| Output On Voltage | 100 to 300 mV |
| Supply Current (Chip awake) | 2.0 mA |
| Supply Current (Chip asleep) | 8.0 µA |
| Operate Point (South pole) | 37 to 55 G |
| Release Point (South pole) | 10 to 31 G |
| Hysteresis | 5.9 G |
The device operates with a supply voltage range of 2.5 V to 3.5 V.
No, it is pole independent; either a north or south pole of sufficient strength will turn the output on.
The average supply current when the chip is asleep is 8.0 µA.