A1202_12 Datasheet, PDF (1/14 Pages) Allegro MicroSystems – 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.

A1202 and A1203
Continuous-Time Bipolar Switch Family
Features and Benefits
▪ Continuous-time operation
▫ Fast power-on time
▫ Low noise
▪ Stable operation over full operating temperature range
▪ Reverse battery protection
▪ Solid-state reliability
▪ Factory-programmed at end-of-line for optimum
performance
▪ Robust EMC performance
▪ High ESD rating
▪ Regulator stability without a bypass capacitor
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Description
The Allegro^® A1202 and A1203 Hall-effect bipolar switches
are next-generation replacements and extension of the popular
Allegro A3133 andA3132 bipolar switch product line. Overall,
theA120x 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.
TheA120x 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
Not to scale
VCC
A1202-DS, Rev. 17
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Functional Block Diagram
Regulator
To all subcircuits
Amp
Gain
Offset
Trim
Control
VOUT
GND