Single-Phase Electric Meter with Isolated Energy Measurement


Design files


Electric meter developers often prefer to separate the energy measurement function from the host processor functions such as ANSI/IEC data tables, DLMS/COSEM, tariff management, and communications. This design demonstrates a method for keeping these meter functions separated by using an individual metrology processor and host processor. The firmware supplied with the design manages all of the required functions and synchronization between the processors. The design also demonstrates how to isolate communications between the two processors to achieve the necessary safety requirements. Finally, this design demonstrates a method for meter calibration using the USB interface on an MSP430 MCU. Engineers will be able to more quickly develop smart meters with isolated metrology functions by reusing this reference design.

  • Simplified meter calibration by using USB connection
  • Isolated communications between metrology AFE and host MCU
  • TI Energy Library for metrology calculates all energy measurement parameters
  • Host MCU application controls on-board LCD and meter calibration
  • Single-phase energy measurement achieves Class 0.2 accuracy
  • Segment LCD on board
??image.gallery.download_en_US?? View video with transcript Video

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.

TIDU455A.PDF (5621 K)

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

TIDC622.ZIP (212 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.

Digital isolators

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

Data sheet: PDF | HTML
Digital isolators

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

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

TPS77050-mA, 10-V, low-IQ, low-dropout voltage regulator

Data sheet: PDF
MSP430 microcontrollers

MSP430AFE25312 MHz metering AFE with 3 24-bit Sigma-Delta ADCs, 16KB Flash, 512B RAM

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F663820 MHz MCU with 256KB Flash, 16KB SRAM, 12-bit ADC, 12-bit DAC, comparator, DMA, 160 seg LCD, USB

Data sheet: PDF
Other wireless technologies

CC2530-RF4CEZigbee, IEEE 802.15.4 and RF4CE wireless MCU with 256kB Flash and 8kB RAM

Data sheet: PDF
Zigbee products

CC2530Zigbee and IEEE 802.15.4 wireless MCU with 256kB Flash and 8kB RAM

Data sheet: PDF

Start development


Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide Single-Phase Electric Meter with Isolated Energy Measurement Design Guide (Rev. A) Jan. 13, 2016

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​