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TIDA-010243

Three-phase current transformer e-meter reference design with standalone ADC

Design files

TIDA-010243

Design files

Overview

This reference design implements Class 0.1 three-phase energy measurement using a high-performance, multichannel analog-to-digital converter (ADC), which samples current transformers (CT) at 8 kHz to measure the current and voltage of each leg of the AC mains. This reference design achieves high accuracy across a wide input current range from 0.05 A to 100 A and supports high sampling frequencies necessary for power quality features such as individual harmonic analysis. An ADC sample rate of 32 kSPS can be achieved when using a TI Arm® Cortex®-M0+ host microcontroller for metrology. The necessary software functionality is implemented by porting the TI ADC energy metrology library to MSPM0G3507 and can be compiled with Code Composer Studio™.

Features

ANSI C12.20 Class 0.1 active energy accuracy across 2000:1 input range
Active and reactive energy and power, RMS current and voltage including power factor with line-frequency calculations
Isolated RS-232 and RS-485 with 5 kV RMS isolation
50 mA to 100 A input range
Complete tested reference design with hardware files and design guide

Industrial

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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.

Design guide — TIDA-010243

PDF | HTML

TIDUF25.PDF (1559 K)

Reference design overview and verified performance test data

Schematic — TIDA-010243

TIDMBP3.PDF (619 K)

Detailed schematic diagram for design layout and components

Bill of materials (BOM) — TIDA-010243

TIDMBP4.PDF (185 K)

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

Assembly drawing — TIDA-010243

TIDMBP5.PDF (446 K)

Detailed overview of design layout for component placement

CAD/CAE symbol — TIDA-010243

TIDMBP7.ZIP (2554 K)

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

Gerber file — TIDA-010243

TIDCGG0.ZIP (986 K)

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

PCB layout — TIDA-010243

TIDMBP6.PDF (1979 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Arm Cortex-M0+ MCUs

MSPM0G3507 — 80MHz Arm M0+ MCU, 128KB Flash, 32KB SRAM, 2×12bit 4Msps ADC, DAC, 3×COMP, 3×op-amp, CAN-FD, MATHACL

Data sheet: PDF | HTML

Digital isolators

ISO6720 — General purpose dual-channel, 2/0, digital isolator

Data sheet: PDF | HTML

Digital isolators

ISO6731 — General-purpose, triple-channel, 2/1, digital isolator

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TPS709 — 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

Data sheet: PDF | HTML

MSP430 microcontrollers

MSP430FR4131 — 16 MHz MCU with 4KB FRAM, 0.5KB SRAM, 10-bit ADC, LCD, UART/SPI/I2C, IR logic, timer

Data sheet: PDF | HTML

Multi-axis linear & angle position sensors

TMAG5273 — Low-power linear 3D Hall-effect sensor with I²C interface

Data sheet: PDF | HTML

Precision ADCs

ADS131M08 — 24-bit, 32-kSPS, 8-channel, simultaneous-sampling, delta-sigma ADC

Data sheet: PDF | HTML

RS-232 transceivers

TRS3232E — 3- to 5.5-V dual channel 250kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Data sheet: PDF | HTML

RS-485 & RS-422 transceivers

THVD1400 — 3.3-V to 5-V, 500-Kbps, RS-485 transceiver in small package option with ±12-kV IEC ESD pro

Data sheet: PDF | HTML

Supervisor & reset ICs

TPS3840 — Nanopower high-input voltage supervisor with manual reset and programmable-reset time delay

Data sheet: PDF | HTML

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Software

Firmware

TIDA-010243-FIRMWARE — Firmware source code for TIDA-010243

Firmware source code for TIDA-010243 for Rev.2 PCB

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TIDA-010243-FIRMWARE — Firmware source code for TIDA-010243

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Latest version

Version: 1.0

Release date: 20 Jul 2023

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TICGG3.zip — 10573 K

Windows Installer for TIDA-010243 Firmware

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Technical documentation

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	Type	Title		Date
	Design guide	Cost-Effective, 3-Phase CT Electricity Meter Ref. Design Using Standalone ADC	PDF \| HTML	Jun. 30, 2023

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