A1227LLTTR-T屬于傳感器變送器的磁性傳感器-開關（固態(tài)）。由Allegro MicroSystems制造生產(chǎn)的A1227LLTTR-T磁性傳感器 - 開關（固態(tài)）該系列產(chǎn)品使用固態(tài)技術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。

Description

These Hall-effect latches are extremely temperature-stable and stress resistant sensor ICs especially suited for operation over extended temperature ranges to 150°C. Superior high temperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switchpoints that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter. The three basic devices (A1225, A1227, and A1229) are identical except for magnetic switchpoints.

Features and Benefits

? Symmetrical switchpoints

? Superior temperature stability

? Operation from unregulated supply

? Open-drain 25 mA output

? Reverse Battery protection

? Activate with small, commercially available permanent magnets

? Solid-state reliability

? Small size

? Resistant to physical stress

? Enhanced ESD structures result in 8 kV HBM ESD performance without external protection components

? Internal protection circuits enable 40 V load dump compliance without external protection components