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44 Results

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.

isolated amplifiers and modulators

Isolated Amplifiers and Modulators

This section of training videos will introduce isolated amplifiers and modulators, providing context around what they are, why they're used, where they're commonly used, key specifications and more.

Introduction to Frequency Domain

Date:
April 14, 2017

Duration:
11:18
This video introduces the concept of the frequency domain.

Anti-tamper Techniques to Thwart Attacks on Smart Meters— Hardening a meter against magnetic tamper attacks: Cap-Drop Based High-Side Power Supplies

Date:
April 12, 2017

Duration:
05:35
This module covers the advantages and disadvantages of using a cap drop power supply to power the high-side of the AMC1304
Fast Fourier Transforms (FFT)

Fast Fourier Transforms (FFTs) and Windowing

Date:
April 14, 2017

Duration:
10:46
This video introduces the FFT as well as the concept of windowing to minimize error sources.
Coherent Sampling

Coherent Sampling and Filtering to Improve SNR and THD

Date:
April 14, 2017

Duration:
06:59
This video introduces the concept of coherent sampling and filtering for accurate characterization.

Building the SAR ADC Model

Date:
April 14, 2017

Duration:
12:17
This video walks through the process of creating a TINA Spice Model for a SAR ADC.

Refine the Rfilt and Cfilt Values on ADC Drive

Date:
April 14, 2017

Duration:
13:43
This video walks through the process for optimizing the selection of the external R and C values.

Math Behind the R-C Component Selection

Date:
April 14, 2017

Duration:
06:10
This video walks through the mathematical algorithm used in the ADC SAR Drive Calculator.

Using SPICE Monte Carlo Tool for Statistical Error Analysis

Date:
April 14, 2017

Duration:
07:09
This video shows how the TINA-SPICE Monte Carlo analysis can be used for statistical error analysis.

Understanding and Calibrating the Offset and Gain for ADC Systems

Date:
April 14, 2017

Duration:
13:22
This video discusses how gain and offset errors can be calculated and eliminated through calibration.

Determining a SAR ADC’s Linear Range when using Operational Amplifiers

Date:
April 14, 2017

Duration:
17:19
This video shows how to design the front-end op-amp drive circuit for linear operation.
ADC drive topologies: using an INA

Determining a SAR ADC’s Linear Range when using Instrumentation Amplifiers

Date:
April 14, 2017

Duration:
09:17
This video shows how to design a front-end instrumentation amplifier drive circuit for linear operation.

Driving a SAR ADC with a Fully Differential Amplifier

Date:
April 14, 2017

Duration:
13:38
This video explains how to design ADC drive circuits using fully differential amplifiers, or FDAs.  

Statistics Behind Error Analysis of ADC System

Date:
April 14, 2017

Duration:
07:02
This video covers the statistical implication of the typical and maximum data sheet specification values.

SAR ADC Input Types

Date:
April 14, 2017

Duration:
11:46
This video highlights the different input types for ADCs.  

Calculating the Total Noise for ADC Systems

Date:
April 14, 2017

Duration:
10:11
This video walks through how to predict the overall system noise for an ADC, amplifier, and reference.

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— Hardening a meter against magnetic tamper attacks: Isolated Shunt Sensing Building Blocks

Date:
April 12, 2017

Duration:
06:00
This module explains different measurement building blocks that could be used to implement isolated shunt current sensors for poly-phase systems.
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