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TIDM-METROLOGY-HOST

Single-Phase Electric Meter with Isolated Energy Measurement

Design files

TIDM-METROLOGY-HOST

Design files

Overview

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.

Features
  • 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
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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.

download Design guide — TIDM-METROLOGY-HOST
TIDU455A.PDF (5621 K)

Reference design overview and verified performance test data

download Schematic — TIDM-METROLOGY-HOST
TIDRAI6.PDF (120 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDM-METROLOGY-HOST
TIDRAI7.PDF (100 K)

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

download CAD/CAE symbol — TIDM-METROLOGY-HOST
TIDRAI8.ZIP (299 K)

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

download Gerber file — TIDM-METROLOGY-HOST
TIDC622.ZIP (212 K)

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

download PCB layout — TIDM-METROLOGY-HOST
TIDRAI9.ZIP (452 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Digital isolators

ISO7420 — Dual-channel, 2/0, 1-Mbps digital isolator

Data sheet: PDF | HTML
Digital isolators

ISO7421 — Dual-channel, 1/1, 1-Mbps digital isolator

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

TPS770 — 50-mA, 10-V, low-IQ, low-dropout voltage regulator

Data sheet: PDF
MSP430 microcontrollers

MSP430AFE253 — 12 MHz metering AFE with 3 24-bit Sigma-Delta ADCs, 16KB Flash, 512B RAM

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F6638 — 20 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-RF4CE — Zigbee, IEEE 802.15.4 and RF4CE wireless MCU with 256kB Flash and 8kB RAM

Data sheet: PDF
Zigbee products

CC2530 — Zigbee and IEEE 802.15.4 wireless MCU with 256kB Flash and 8kB RAM

Data sheet: PDF

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Software

Technical documentation

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* Design guide Single-Phase Electric Meter with Isolated Energy Measurement Design Guide (Rev. A) Jan. 13, 2016

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