A1425 - Allegro MicroSystems

A1425 High Accuracy Analog Speed Sensor

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.

Features

▪ 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 switch point PACKAGE: 4 pin SIP (suffix K) DESCRIPTION The A1425 AC-coupled Hall-effect sensor IC is a monolithic integrated circuit that switches in response.