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

A1425属于传感器，变送器 > 磁性传感器 - 开关（固态）。Allegro MicroSystems制造生产的A1425磁性传感器 - 开关（固态）该系列产品使用固态技术来检测是否存在超过某个特定幅度和/或标示的磁场，并提供指示是否存在此类磁场的双态输出。它们与磁簧开关以及线性或罗盘型固态器件不同，前者通过使用移动机械部件来提供类似的功能，后者提供指示所施加磁场的强度和/或方向的可变输出。