Description

The A1425 AC-coupled Hall-effect sensor IC is a monolithic integrated circuit that switches in response to changing differential magnetic fields created by rotating ring magnets and, when coupled with a magnet, by ferrous targets. The device is a true zero-crossing detector: the output switches precisely when the difference in magnetic field strength between the two Hall elements is zero.

Features and Benefits

? Used in sensing motion of ring magnet or ferrous targets

? Integrated filter capacitor

? Wide operating temperature range

? Operation with magnetic input signal frequency from 20 Hz to 20 kHz

? Resistant to EMI

? Large effective air gaps

? 4.0 to 26.5 V supply operating range

? Output compatible with both TTL and CMOS logic families

? Reverse battery protection

? Resistant to mechanical and thermal stress

? Accurate true zero-crossing switchpoint

A1425LK屬于傳感器，變送器 > 磁性傳感器 - 開(kāi)關(guān)（固態(tài)）。Allegro MicroSystems制造生產(chǎn)的A1425LK磁性傳感器 - 開(kāi)關(guān)（固態(tài)）該系列產(chǎn)品使用固態(tài)技術(shù)來(lái)檢測(cè)是否存在超過(guò)某個(gè)特定幅度和/或標(biāo)示的磁場(chǎng)，并提供指示是否存在此類(lèi)磁場(chǎng)的雙態(tài)輸出。它們與磁簧開(kāi)關(guān)以及線性或羅盤(pán)型固態(tài)器件不同，前者通過(guò)使用移動(dòng)機(jī)械部件來(lái)提供類(lèi)似的功能，后者提供指示所施加磁場(chǎng)的強(qiáng)度和/或方向的可變輸出。