TIDA-00601

Multi-phase Energy Measurement with Isolated Shunt Sensors Reference Design

TIDA-00601

Design files

Overview

The TIDA-00601 design implements a Class 0.5% three-phase energy measurement system with isolated shunt sensors.  The isolation is achieved through the use of isolated delta-sigma modulators that have output circuitry capacitively isolated from input circuitry.  An energy measurement SoC takes the different bit-streams from the isolated modulators and uses its on-board digital filters to produce ADC sample readings.  The energy measurement SoC is also used for sensing voltages, calculating metrology parameter values, driving the board’s LCD, and communication to a PC GUI via the board’s isolated RS-232 circuitry.

This reference design uses the ISO7420 and ISO7421. This reference design can also be used with the ISO7320C and ISO7321C.

This reference design uses the AMC1304M05. This reference design can also be used with the AMC1304M25.

This reference design uses the MSP430F67641. This reference design can also be used with the MSP430F67641A.

Features
  • Class 0.5% three-phase metrology with galvanically isolated shunt current sensors
  • Shunt isolation with working isolation voltage up to 1 kV AC and peak isolation voltage of 7kV
  • TI Energy Library firmware calculates all energy measurement parameters including active and reactive power and energy, RMS current and voltage, power factor, and line frequency
  • Isolated RS-232 with 3 kV RMS operating isolation boundary for communication to PC GUI
  • Built-in 160-segment display for display of  metrology parameters

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDREZ9A.PDF (96 K)

Detailed schematic diagram for design layout and components

TIDRF00B.PDF (247 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRF02A.ZIP (350 K)

Files used for 3D models or 2D drawings of IC components

TIDCAD1.ZIP (288 K)

Design file that contains information on physical board layer of design PCB

TIDRF01.PDF (380 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Isolated ADCs

AMC1304M05Reinforced Isolated Modulator With LDO Regulator, ±50mV Input, and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated ADCs

AMC1304M25Reinforced Isolated Modulator With LDO Regulator, ±250mV Input, and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7320CLow-power, dual-channel, 2/0, 25-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7321CLow-power, dual-channel, 1/1, 25-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7420Dual-channel, 2/0, 1-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7421Dual-channel, 1/1, 1-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F67641Low-cost polyphase metering SoC with 3 Sigma-Delta ADCs, 10-bit SAR ADC, LCD, 128KB Flash, 8KB RAM

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F67641ALow-cost polyphase metering SoC with 3 Sigma-Delta ADCs, 10-bit SAR ADC, LCD, 128KB Flash, 8KB RAM

Data sheet document-pdfAcrobat PDF open-in-new HTML
RS-232 transceivers

TRS32323- to 5.5-V dual channel 250kbps RS-232 line driver/receiver with +/-15-kV ESD protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

Support software

TIDA-00601 Software (Rev. A) – TIDCAD2A.ZIP (7062 K)

Technical documentation

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Type Title Date
* User guide Multi-Phase Energy Measurement With Isolated Shunt Sensors Design Guide (Rev. A) Aug. 11, 2015
Technical article A smarter way for solar to power the grid – think inside the box May 05, 2016
Technical article Meter anti-tampering: Stopping those pesky meter tamperers Jan. 12, 2016
Technical article Ditching the current transformer – Part 3: How to use shunt sensors in poly-phase metrology systems Sep. 30, 2015
Technical article Ditching the current transformer – Part 2: Overcoming the disadvantages of using shunt current sensors Sep. 10, 2015

Support & training

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