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

8 Summary

Although there are several options when choosing a solution for security sensors, many factors need to be accounted for to offer the most robust solution while also offering reasonable resistance to tampering. Although the Reed switch is often the go to solution due to simplicity and relatively low initial cost, there are pitfalls associated with this device that provide erratic detection fields which can become an easy target for tampering. Low power Hall-effect switches, such as the DRV5032, can provide a nano-powered and cost competitive alternative sensing solution to Reed switches with a tighter, more symmetrical detection range. For the designer looking for added mechanical flexibility and advanced field detection capabilities, linear 3D Hall-effect sensors such as the TMAG5170 and the cost competitive TMAG5273 provide a linear response output with 3-axis detection, which can easily detect tamper attempts and stray magnetic fields. Ultimately, TI offers many robust solutions for security sensors that are both low cost and dependable. Switching from a Reed switch has never been easier!