Measurement Module for Branch Circuit Power Monitor Reference Design


Design files


This reference design targets measurement accuracy across the rated current range while at the same time being a cost efficient solution. This is achieved by using a highly integrated SoC device which has up to 7 channels of the 24-bit Delta-Sigma ADCs available for current measurement. For voltage measurement a 10-bit SAR ADC is used. With both current and voltage available, power measurement can now be made. This solution also has several options for communication supported such as UART, JTAG, etc. Applications include load management, sub-panels, etc.

  • Precise current measurement through 7 channels of Delta-Sigma ADCs
    • < 1% from 10% to 100% of rated current (controlled by CT & burden resistor)
  • Voltage measurement enabled with integrated SAR ADC
  • Extended temperature range operability of -40°C to +105°C
  • Integrated single chip solution results in a cost and area efficient solution
  • Large MSP Family & Roadmap / Scale performance, features, price
  • Metering library available in source for use on MSPs
  • Low cost, easy to use development tools and reference designs / Fast time-to-market
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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.

TIDU430.PDF (3902 K)

Reference design overview and verified performance test data

TIDRB46.PDF (1532 K)

Detailed schematic diagram for design layout and components

TIDRB47.PDF (59 K)

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

TIDRB48.ZIP (278 K)

Detailed overview of design layout for component placement

TIDRB50.ZIP (2157 K)

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

TIDC691.ZIP (216 K)

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

TIDRB49.PDF (2022 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

General-purpose op amps

OPA4314Quad, 5.5-V, 3-MHz, low noise (4.6-nV/√Hz), RRIO operational amplifier

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F6779Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, AES, 512KB Flash, 32KB RAM

Data sheet: PDF | HTML
N-channel MOSFETs

CSD17571Q230-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 29 mOhm

Data sheet: PDF | HTML
Shunt voltage references

LM4041BAdjustable, precision micropower shunt voltage reference with 0.2% accuracy

Data sheet: PDF

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Technical documentation

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Type Title Date
* Design guide Measurement Module for Branch Circuit Power Monitor/Sub Meter (TIDA-00222) Sep. 30, 2014

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