Multi-Phase Power Quality Measurement with Isolated Shunt Sensors Reference Design


Design files


The TIDA-01088 reference design implements power quality parameter measurement in a polyphase energy measurement system. Total harmonic distortion (THD), fundamental readings, and standard metrology parameters such as active and reactive energy and power are calculated. Phase to phase angles are also calculated to help prevent incorrect installation of the system. This design uses isolated shunt current sensors to maintain accuracy in harmonic analysis and also immunity from magnetic tamper attacks.

  • Class 0.5% Three-phase metrology with galvanically isolated shunt current sensors
  • Isolation performance of up to 1-kV AC (working voltage) and 7 kV (Peak)
  • Total Harmonic Distortion (THD) calculated for Voltage and Current
  • Voltage Sag and Swell events logged with programmable threshold levels
  • Phase to Phase angle measurement for determining phase sequence to help prevent incorrect installation of system
  • Complete Energy Library with Fundamental Voltage and Current, Fundamental Active and Reactive power, Active and Reactive Energy, Root Mean Square(RMS) Current and Voltage, Power Factor, and Line Frequency
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


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

TIDCC52.ZIP (289 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Isolated ADCs

AMC1304M05±50-mV input, precision current sensing reinforced isolated modulator with LDO

Data sheet: PDF | HTML
Digital isolators

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

Data sheet: PDF | HTML
Digital isolators

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

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS763150-mA, 10-V, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
MSP430 microcontrollers

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

Data sheet: PDF | HTML
RS-232 transceivers

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

Data sheet: PDF | HTML
Transformer drivers

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

Data sheet: PDF | HTML

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Support software

TIDCC53 TIDA-01088 Software

Technical documentation

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Type Title Date
* Design guide Multi-Phase Power Quality Measurement With Isolated Shunt Sensors Design Guide (Rev. A) Jul. 26, 2016
Technical article Quantifying harmonic distortion - Effect of sinc3 filter roll off (part 3) PDF | HTML Aug. 07, 2017

Related design resources

Reference designs

TIDA-00601 Multi-phase Energy Measurement with Isolated Shunt Sensors Reference Design TIDM-3PH-ENERGY5-ESD Class 0.5 Three-Phase Energy Measurement System with Enhanced ESD Protection Reference Design TIDM-THDREADING Total Harmonic Distortion Measurement For Energy Monitoring Reference Design

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