SBAA510 October   2021 DRV5032 , TMAG5170 , TMAG5231 , TMAG5273

 

  1.   Trademarks
  2. 1Introduction
  3. 2Reed Switch Overview
  4. 3Hall Effect Sensor Overview
  5. 4Performance Comparison
  6. 5DRV5032 Test Setup and Results
    1. 5.1 DRV5032 Test Setup
    2. 5.2 Understanding the Results
    3. 5.3 DRV5032 Test Results
    4. 5.4 Front Approach Results
    5. 5.5 Side Approach
    6. 5.6 Tamper Susceptibility Testing Setup
    7. 5.7 Tamper Susceptibility Test Results
  7. 6Reed Switch Test Setup and Results
    1. 6.1 Reed Switch Test Setup
    2. 6.2 Reed Switch Test Results
    3. 6.3 Front Approach Results
    4. 6.4 Side Approach Results
    5. 6.5 Tamper Susceptibility Testing Setup
    6. 6.6 Reed Switch Tamper Susceptibility Test Results
  8. 7TMAG5170 Test Setup and Results
    1. 7.1 TMAG5170 Test Setup
    2. 7.2 TMAG5170 Test Results
    3. 7.3 TMAG5170 Tamper Susceptibility Testing Setup
    4. 7.4 TMAG5170 Tamper Susceptibility Test Results
  9. 8Summary

1 Introduction

Door and window sensors make up the backbone of any home security system and are specifically intended to monitor which doors and windows are opened and closed within a home or office. These devices are mostly battery operated and communicate with a main security system hub with information as to whether a door or window is open/closed. If an event occurs in which a door or window gets opened or breached when the alarm is on, the sensor sends an alert signal to the main control panel and immediately triggers the main alarm.

If we dive deeper into the internal workings of the door/window sensor, there is one device that is clearly integral to the functionality of this device, a ferromagnetic sensitive device. This can be a simple Reed switch or a Hall Effect sensor, but which is better for your design and why?

The subsequent sections of this article provide an overview of the common Reed Switch, the DRV5032, and the TMAG5170 in addition to a test/result based comparison with respect to performance and tamper susceptibility.