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Current sensor and metrology architecture options

This section compares two types of current sensors used in electricity meters: current transformers and shunts.  In addition, it discusses three different architectures for sensing the voltage and current samples used to calculate the metrology parameters.  These architectures include a SoC-based architecture, AFE-based architecture, and ADC-based architecture.

Introduction to TIDA-010036 reference design

This section provide an overview of the TIDA-010036 reference design, which uses the ADS131M04 delta sigma standalone ADC for sensing the voltage and current necessary to calculate metrology parameters.  The TIDA-010036 design targets Class 0.5 single-phase two-wire meters with shunt current sensors and has a compact, magnetically immune cap-drop power supply to power the design from AC mains.

TIDA-010036 hardware design

This section provides an overview of the hardware used in the TIDA-010036 design, which includes the circuits used to translate the Mains voltage and current to the voltage waveform sensed by the ADS131M04.  In addition, it covers the TPS7A78-based cap-drop power supply used in this design.

Designing software for 1-phase electricity meters that use standalone ADCs

This section covers the initialization code and algorithms that can be used to calculate metrology parameters in a single-phase system using the sensed voltage and current samples.

ADS131M04 current detection mode for detecting neutral removal tampering

This section discusses current detection mode, which is a special low-power mode of the ADS131M04 standalone ADC, that can detect the presence of current when someone has tampered with a meter by removing its neutral connection.

Calibration and metrology accuracy results

This section discusses the procedure used to calibrate the TIDA-010037 design and the results obtained with this design.

Summary

In this section, a summary of the entire “How to design 1-phase shunt electricity meters using standalone metrology ADCs” training module would be covered.  Links will be provided for the reference designs that were discussed during this training series.
TI Precision Labs – ADCs

Error Sources

These videos describe how to calculate error and noise of analog-to-digital converters (ADCs).

TI Precision Labs – ADCs

Analog-to-Digital Converter (ADC) Drive Topologies

These videos describe the different types front-end topologies that can be used to drive the input signal of an ADC.

Tech Days

Overview and Demos

Were you unable to attend Tech Day but want to view the featured content? Did you attend and want to revisit a particular session? This series contains many of the sessions from the embedded processing, power supply design, signal chain, and wireless connectivity tracks. In addition, this series features recordings of select TI demos from the exhibitors hall.

Tech Days

Signal Chain

Were you unable to attend Tech Day but want to view the featured content? Did you attend and want to revisit a particular session? This series contains many of the sessions from the signal chain track. In addition, this series features recordings of select TI demos from the exhibitors hall.

Power amplifier biasing with precision DACs and ADCs

Date:
August 13, 2019

Duration:
04:16
This video takes a look at how a device with integrated ADCs, DACs, and temperature sensors can be used in power amplifier biasing.

Building Block DACs: A systems thinking approach

Date:
July 2, 2019

Duration:
09:56
Explains how a precision DAC is used in different circuits and how to find the suitability of a DAC for a given end equipment or a subsystem.

Flexible interface (PRU-ICSS) for data acquisition using multiple ADCs

Date:
June 3, 2019

Duration:
07:11
This video covers flexible interface between the PRU-ICSS and multiple ADCs to achieve simultaneous and coherent sampling (TIDA-01555).
Webinar: Solve smart meter design needs

Solve smart meter design needs in metrology, backup power, wireless communications & battery monitoring

Date:
May 10, 2019

Duration:
43:20
Introduction to new reference designs for smart meters

Precision DAC system design - circuits, software, and tools

Date:
May 7, 2019

Duration:
17:55
Explains circuit and software design for a precision DAC as well as the tools and support available from TI to minimize the learning time.

Precision DACs - A practical overview

Date:
May 7, 2019

Duration:
21:05
A practical overview of the basics of precision DACs, their key performance parameters, and what applications they are found in.
EOS and ESD on ADC

EOS and ESD on ADC

Date:
April 6, 2019

Duration:
16:00
This video starts with an introduction of electrical overstress, abbreviated EOS, and Electrostatic Discharge.

How to design 1-phase shunt electricity meters using standalone metrology ADCs

As processing requirements for electricity meters gradually increase, it becomes increasingly difficult to find one device that meets both the processing requirements for adding advanced metrology features to smart meters while also accurately sensing metrology parameters, such as RMS voltage, RMS current and active power.  To deal with this design challenge, one option is to use a separate metrology microcontroller and a standalone ADC.

How to design high-accuracy CT-based split-phase electricity meters using standalone metrology ADCs

As processing requirements for electricity meters gradually increase, it becomes increasingly difficult to find one device that meets both the processing requirements for adding advanced metrology features to smart meters while also accurately sensing metrology parameters, such as RMS voltage, RMS current, and active power.  To deal with this design challenge, one option is to use a separate metrology microcontroller and a standalone ADC.

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