A1214

The Allegro® A1210-A1214 Hall-effect latches are next generation replacements  for the popular Allegro 317x and 318x lines of latching switches. The A1210-A1214  family, produced with BiCMOS technology, consists of devices that feature fast  power-on time and low-noise operation. A1210-A1214 programming is performed after  packaging, to ensure increased switchpoint accuracy by eliminating offsets that  can be induced by package stress. Unique Hall element geometries and low-offset  amplifiers help to minimize noise and to reduce the residual offset voltage nor- mally caused by device overmolding, temperature excursions, and thermal stress.

The A1210-A1214 Hall-effect latches include the following on a single silicon  chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt  trigger, and NMOS output transistor. The integrated voltage regulator permits  operation from 3.8 to 24 V. The extensive on-board protection circuitry makes  possible a ±30 V absolute maximum voltage rating for superior protection in  automotive and industrial motor commutation applications, without adding  external components. A1210-A1214 in the family are identical except for magnetic  switchpoint levels.