A3230中文资料稳定斩波型霍尔效应双极开关数据手册Allegro规格书

描述 Description

These parts are discontinued.  Samples are no longer available. For new customers or new applications, please refer to Allegro A1250.  Date of status change: December 2, 2013.

The A3230 Hall-effect sensor IC is a temperature stable, stress-resistant bipolar switch. This device is the most sensitive Hall-effect device in the Allegro bipolar switch family and is intended for ring-magnet sensing. Superior high-temperature performance is made possible through an Allegro patented dynamic offset cancellation that utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.

The A3230 includes the following 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. Advanced BiCMOS wafer fabrication processing takes advantage of low-voltage requirements, component matching, very low input-offset errors, and small component geometries.

The A3230 Hall-effect bipolar switch turns on in a south polarity magnetic field of sufficient strength and switches off in a north polarity magnetic field of sufficient strength. Because the output state is not defined if the magnetic field is diminished or removed, to ensure that the device switches, Allegro recommends using magnets of both polarities and of sufficient strength in the application.

特性 Features

• Chopper stabilization

• Superior temperature stability
• Extremely low switchpoint drift
• Insensitive to physical stress
• Reverse battery protection
• Output short circuit protection
• Solid state reliability
• Small size
• Robust EMC capability
• High ESD ratings (HBM)

简介

A3230属于传感器变送器的磁性传感器-开关（固态）。由制造生产的A3230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。