A1202 -  The Allegro A1202 and A1203 Hall-effect bipolar switches are next-generation replacements and extension of the popular Allegro A3133 and A3132 bipolar switch product line.

Description

The Allegro® A1202 and A1203 Hall-effect bipolar switches 

are next-generation replacements and extension of the popular 

Allegro A3133 and A3132 bipolar switch product line. Overall, 

the A120x family, produced with BiCMOS technology, consists 

of continuous-time devices that feature fast power-on time 

and low-noise operation. Device 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 normally caused by device overmolding, temperature 

excursions, and thermal stress.

The A120x Hall-effect bipolar switches 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 motor commutation