Allegro Microsystems, Inc. is a manufacturer of system level solutions of advanced mixed-signal, Hall-effect sensors and analog power ICs. Allegro Microsystems is the only Hall-effect manufacturer with BiCMOS design capabilities. Learn more about Allegro.
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 Hall-Effect Sensor ICs
Allegro's A1220, A1221, and A1222 Hall-effect sensor ICs are extremely temperature-stable and stress-resistant devices. They are especially suited for operation over extended temperature ranges up to 150°C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.
On a single silicon chip, each device includes a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output to sink up to 25mA. A south pole of sufficient strength turns the output on. A north pole of sufficient strength is necessary to turn the output off.
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