One-phase shunt electricity meter reference design using standalone ADCs TIDA-010036 (ACTIVE)

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Key Document

Description

This reference design implements Class 0.5 single-phase energy measurement using standalone multi-channel analog-to-digital converters (ADC) to sample a shunt current sensor. With the combination of the shunt sensor and a compact magnetically immune power supply, the design provides protection against magnetic tampering attacks. The design also provides the capability to detect potential tampering from neutral line disconnection. The combination of a high-performance ARM Cortex-M4 MCU to execute the metrology calculations and 8-kHz sampling rate allows the addition of power quality functions, such as individual harmonic analysis.

Features
  • Class 0.5 single-phase metrology tested across 50-mA to 90-A input range
  • Calculated parameters include active and reactive energy and power, RMS line current, RMS neutral current, RMS voltage, power factor, and line frequency
  • Detects potential tamper attacks with low-power current detection mode
  • Compact non-magnetic power supply with power good indication and supply failure alerts
  • RS-485 and RS-232 interfaces with 5kV RMS isolation
  • Complete, tested reference design with hardware files and design guide

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Design Files

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TI Devices (9)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS131M04  24-bit 32-kSPS 4-channel simultaneous-sampling delta-sigma ADC  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ISO7720  High-speed, robust EMC reinforced dual-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7731B  High-speed basic insulation triple-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
MSP432P4111  SimpleLink Ultra-Low-Power 32-Bit Arm Cortex-M4F MCU with Precision ADC, 2MB Flash and 256KB RAM  SimpleLink MCUs  Sample & Buy View Design Kits & Evaluation Modules
THVD1500  5-V RS-485 transceiver up to 500 kbps with ±8-kV IEC ESD protection  Interface  Sample & Buy View Design Kits & Evaluation Modules
TPS3840  Nanopower high-input voltage supervisor with manual reset and programmable-reset time delay  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150-mA 30-V ultra-low-Iq wide-input low-dropout (LDO) regulator with reverse current protection  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A78  120-mA smart AC/DC low-dropout (LDO) linear voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TRS3232E  3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15-kV ESD Protection  Interface  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO7720 Download Download
Download
Download Download
ISO7731B Download
MSP432P4111 Download Download
THVD1500 Download
TPS3840 Download Download
TPS709 Download
Download
TRS3232E Download -
Download Download
Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 7267 30 Apr 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1888 29 Apr 2019
ZIP 14699 29 Apr 2019
PDF 1817 29 Apr 2019
PDF 394 29 Apr 2019
PDF 168 29 Apr 2019
PDF 634 29 Apr 2019
Related Tools & Software

Reference Designs  ( 1 )


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