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Detecting magnetic tampering using hall-effect sensors

For anti-tampering, it is common to try to detect the presence of a strong magnet. In this section, we will cover the use of hall sensors for low-power detection of strong magnetic fields in three dimensions.  Details on our magnetic tamper detection reference design, TIDA-00839, will be provided as well as some of the design considerations that were kept in mind when creating this reference design.  

Hardening a meter against magnetic tamper attacks

In this section, we will cover how to harden a meter against these magnetic tamper attacks by using shunts for current sensors. For poly-phase implementations, I will go over how to use isolated delta sigma modulators to add the necessary isolation to use shunt current sensors and create magnetically immune poly-phase energy measurement systems. The TIDA-00601 and TIDA-01094 reference designs, which show how to implement a poly-phase isolated shunt measurement system, will be discussed as well as the associated AMC1304 high-side power supplies used in these designs.

TI Precision Labs - Magnetic Sensors: Introduction

These introduction videos give the background on magnetic concepts and Hall Effect ICs for engineers of all experience levels. The second video introduces the magnetic field calculator Texas Instruments created to aid in design challenges.

TI Precision Labs - Magnetic Sensors: Key Specifications

Understanding the key specifications of Hall sensors will aid in ensuring the proper device is selected for a given application. The series of videos in this section will give a thorough explanation of the tradeoffs in bandwidth versus power, the importance of the operate and release point in Hall Effect switches and latches and the key parameters for linear Hall Effect sensors.

TI Precision Labs - Magnetic Sensors: Applications

There are a variety of applications for Hall Effect sensors, each with its own unique system requirement. The series of videos in this section will walk through some of the top Hall applications such as rotary encoding and proximity sensing.

TI Precision Labs - Magnetic Sensors: Calculating Magnetic Fields

When designing Hall applications, understanding the behavior of magnetic fields is crucial. The series of videos in this section will discuss how magnetic fields vary with temperature and axis of rotation.

TI Precision Labs - Sensors

TI Precision Labs - Sensors

TI Precision Labs (TIPL) is the most comprehensive online classroom for analog signal chain engineers. The on-demand courses and tutorials include introductory ideas about device architecture, in addition to advanced, application-specific problem-solving, using both theory and practical knowledge. 

In the TI Precision Labs - Sensors series, our experts will teach you about temperature and magnetic sensors to help you reduce design time and move quickly from proof-of-concept to productization.

Rapid prototyping fundamentals training series

Rapid prototyping fundamental functions

These videos provide understanding of the fundamental functions used for rapid prototyping on TI solutions with minimal or no programming, including the following:

  • Implementing necessary prototyping functions such clocks/GPIO, Read A/D, I2C/SMBus, etc.
  • Seamless interface of various analog EVMs for customer “proof of concept”
  • Standalone UI – Button, (GP Input - GPIO), LCD Display (“Hello”), Music, Serial Interface (Putty, Echo)
Rapid prototyping training series

Rapid prototyping: Getting started with TI solutions

How many times have you said, “I would like to prototype an idea with TI silicon but I can not get software resources" or “I don’t know how to prototype/program.”

This training shows you how to get started prototyping on TI solutions with minimal or no programming, including the following tasks:

TI Precision Labs - Magnetic Sensors: Magnetic Current Sensors

Learn the basics of magnetic current sensors, including how they work, key applications, benefits, and challenges.

Hall Position Sensor Applications Overview

Date:
May 22, 2019

Duration:
17:37
This video introduces you to the latest and innovative Hall-effect position sensing solutions from Texas Instruments.

Automotive Hall sensor rotary encoder reference design

Date:
February 12, 2016

Duration:
01:41
Learn how to use an incremental rotary encoder that uses contactless magnetic sensing to detect rotational speed and direction.

Introduction to Rotary Position Sensors

Date:
May 5, 2017

Duration:
11:59
Learn about the different types of rotary position sensors used in automotive and industrial applications such as HEV/EV, electric power steering, and factory r

Anti-tamper Techniques to Thwart Attacks on Smart Meters— Summary

Date:
April 12, 2017

Duration:
01:00
In this short module, a summary of the entire “Anti-tamper Techniques to Thwart Attacks on Smart Meters” training series will be covered.

Anti-tamper Techniques to Thwart Attacks on Smart Meters— Detecting magnetic tampering using hall-effect sensors: TIDA-00839 Magnetic Tamper Detection Reference Design Features

Date:
April 12, 2017

Duration:
07:42
This module covers how to the use hall sensors, such as the DRV5033, for the low-power detection of strong magnetic fields in three dimensions.

Anti-tamper Techniques to Thwart Attacks on Smart Meters— Detecting magnetic tampering using hall-effect sensors: Magnetic Tamper Detection Testing

Date:
April 12, 2017

Duration:
06:00
This module discusses magnetic tampering tests that were performed on the TIDA-00839 reference design using the DRV5033 to detect magnetic tampering in e-meters
TI Precision Labs – Magnetic Sensors: Understanding Key Specifications of Linear Hall Effect Position Sensors

TI Precision Labs - Magnetic Sensors: Understanding Key Specifications of Linear Hall Effect Position Sensors

Date:
May 5, 2019

Duration:
04:38
This video focuses on the key specifications of linear Hall Effect sensors.
TI Precision Labs – Magnetic Sensors: Using Hall Effect Position Sensors for Rotary Encoding Applications

TI Precision Labs - Magnetic Sensors: Using Hall Effect Position Sensors for Rotary Encoding Applications

Date:
May 5, 2019

Duration:
05:51
This video explains how a Hall Effect sensor can be used for rotary encoding applications.
TI Precision Labs – Magnetic Sensors: Designing an Analog Proximity Sensor

TI Precision Labs - Magnetic Sensors: Designing an Analog Proximity Sensor

Date:
May 5, 2019

Duration:
08:07
This video explains how to create a proximity sensor with a unipolar linear Hall Effect sensor.
TI Precision Labs – Magnetic Sensors: How a Permanent Magnet’s Magnetic Field Changes with Temperature

TI Precision Labs - Magnetic Sensors: How a Permanent Magnet’s Magnetic Field Changes with Temperature

Date:
May 5, 2019

Duration:
03:42
This video will discuss how magnetic field changes with temperature.
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