Measurement Module for Branch Circuit Power Monitor Reference Design
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Key Document


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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Schematic/Block Diagram

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17571Q2  30-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 29 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM4041B  Adjustable, precision micropower shunt voltage reference with 0.2% accuracy  Voltage references  Sample & Buy Not Available
MSP430F6779  Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, AES, 512KB Flash, 32KB RAM  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
OPA4314  Quad, 3MHz, Low-Power, Low-Noise, RRI/O, 1.8V CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17571Q2 WSON (DQK)| 6 Download Download
LM4041B Download Download
Download -
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MSP430F6779 Download -
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3902 30 Sep 2014
Design files (6)
Title Type Size (KB) Date
ZIP 216 09 Oct 2014
ZIP 2157 09 Oct 2014
PDF 2022 09 Oct 2014
ZIP 278 09 Oct 2014
PDF 59 09 Oct 2014
PDF 1532 09 Oct 2014
Related Tools & Software

Software development (1)

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