Description

The A1220, A1221, A1222, and A1223 Hall-effect sensor ICs are extremely temperature-stable and stress-resistant devices especially suited for operation over extended temperature ranges 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. Each device includes on a single silicon chip 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 25 mA. A south pole of sufficient strength turns

the output on. A north pole of sufficient strength is necessary to turn the output off.

Features and Benefits

? Symmetrical latch switchpoints

? Resistant to physical stress

? Superior temperature stability

? Output short-circuit protection

? Operation from unregulated supply down to 3 V

? Reverse battery protection

? Solid-state reliability

? Small package sizes

A1221LLHLT-T屬于傳感器，變送器 > 磁性傳感器 - 開關(guān)（固態(tài)）。Allegro MicroSystems制造生產(chǎn)的A1221LLHLT-T磁性傳感器 - 開關(guān)（固態(tài)）該系列產(chǎn)品使用固態(tài)技術(shù)來檢測是否存在超過某個特定幅度和/或標示的磁場，并提供指示是否存在此類磁場的雙態(tài)輸出。它們與磁簧開關(guān)以及線性或羅盤型固態(tài)器件不同，前者通過使用移動機械部件來提供類似的功能，后者提供指示所施加磁場的強度和/或方向的可變輸出。