磁性位置传感器

Enhancing Smart Home Security with 3D Magnetic Sensors

February 10, 2022

P0173 - As consumers find new ways to outfit their living spaces with simple-to-use smart home and Internet of Things (IoT) products, they may be unaware of certain vulnerabilities and security features.

3DMag Position Sensors

Combining our proven planar and vertical hall technologies, 3DMAGTM solutions offer robust, high-performing, three-axis magnetic field measurements in a single IC.

Two-Point-Programming for the A1330

AN296199 - This application note serves as a guide for using a two-point programming algorithm to calculate and program the values needed for short-stroke rotational position sensing with the A1330 angle sensor IC.

Using A1330 ASEK DLLs to Make Two-Point Labview Programmer

AN296186 - This application note provides guidelines on how to use the A1330 dynamically linked library (DLL) with LabVIEW.

3D Hall-Effect Sensor Magnetic Tamper Detection Smart Home Systems

AN296223 - The experiment results highlight several advantages of 3D Hall-effect sensors such as their ability to detect strong magnetic fields that are randomly applied to the outside of a smart home device.

Enhancements to Slide-By Detection with Linear Sensors

AN296200 - This application note presents a modified solution to magnetic sensing in long stroke applications. Through the incorporation of a microcontroller, a lower cost solution can be realized with fewer linear sensors than previously existing arc tangent solutions.

Application and Advantages of Allegro's ATS344LSP Magnetically Back-Biased Differential Linear Sensor IC

AN296157 - This application note aims to give insight on typical use of the Allegro ATS344LSP back-biased differential linear sensor IC. The main application of this sensor is to measure linear movements, such as shaft axial displacement.

Achieving Fast SENT Message Response with A1346 Linear Hall-Effect Sensor ICs on Shared Bus 

AN296131 - In safety-critical magnetic sensing applications, such as torque sensing in electronic power steering (EPS) modules, redundant sensors are often the approach used to achieve desired performance while maintaining strict safety requirements.

Joystick with Allegro Position Sensor IC

Joysticks are widely used human-machine interfaces (HMI) that simultaneously report information on direction and amplitude. This document explains how to implement a 2D or 3D magnetic sensor to obtain a joystick with well-defined behavior.

Using the SENT Communications Output Protocol with A1341 and A1343 Devices

AN296108 - This application note provides a description of the Allegro implementation of the SENT protocol, which includes extensions developed by Allegro to enhance the information carrying dimensions of the output from the Allegro sensor IC to the vehicle electronic control units (ECU).

Using the A1335 in a Short Stroke Application

AN296166 - This application note is dedicated to short-stroke magnetic applications using Allegro angular position sensors based on circular vertical Hall (CVH) technology. Analyses and data used in this document are based on the A1335 angle sensor IC.

A1334 Angle Sensor IC Product Overview

Allegro’s family of contactless Hall magnetic high resolution 360° angle sensor ICs are designed for safety critical automotive and industrial applications. With their system-on-chip (SoC) architectures, they provide fast output refresh rates and low signal path latency.

Improved Speed and Direction Sensing Using Vertical Hall Technology

The A1262 2D dual-channel Hall-effect sensor IC is offered in a 5-pin SOT23W surface-mount package, as well as a 4-pin SIP through-hole package. It features operation with traditional planar—as well as vertical—magnetic field direction.

Micro-Power Position Sensing in Cell Phone Applications

This note will show how to use the Allegro™ A1171 in a standard flip or slide phone, as well as techniques for sensing three positions using only one magnet and one Hall device in a multipurpose application.

Unipolar Hall-Effect Sensor IC Basics

There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Unipolar switches are described in this application note.