Magnetic Tamper Detection Using Low-Power Hall Effect Sensors Reference Design


Design files


Magnetic tampering can paralyze any transformer in an energy measurement system, which may potentially lead to the system being unable to be powered properly or unable to correctly register the energy consumed by a load.  This design implements a Class 0.2  three-phase energy measurement system that detects magnetic tampering using hall sensors.  Magnetic tamper detection is enabled when running from both main and backup power sources.  Methods are used to reduce the current consumption of the hall sensors to increase battery life when running from the backup power source.

  • Bop =±6.9 mT, Sensor Brp =±3.5mT
  • Support for Backup Power Sources
  • Software Power Duty-Cycling Reduces Current Consumption per Sensor to < 2 µA
  • Three-Phase Energy Measurement Exceeds Class 0.2 Accuracy Requirements from ANSI and IEC
  • TI Energy Library Firmware Calculates All Energy Measurement Parameters Including Active and Reactive Power; Active and Reactive Energy; Root Mean Square (RMS) Current and Voltage; Power Factor; and Line Frequency
??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.

TIDUB69.PDF (3284 K)

Reference design overview and verified performance test data

TIDRJ34.PDF (62 K)

Detailed schematic diagram for design layout and components

TIDRJ35A.PDF (210 K)

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

TIDRJ37.ZIP (413 K)

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


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

TIDRJ36.PDF (277 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS540603.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode

Data sheet: PDF | HTML
Digital isolators

ISO7320CLow-power, dual-channel, 2/0, 25-Mbps digital isolator

Data sheet: PDF | HTML
Digital isolators

ISO7321CLow-power, dual-channel, 1/1, 25-Mbps digital isolator

Data sheet: PDF | HTML
Flyback controllers

UCC28910700V Flyback switcher with constant-voltage constant-current and primary-side control

Data sheet: PDF | HTML
Hall-effect latches & switches

DRV5032Low power (5 Hz, <1µA), low voltage (up to 5.5V) switch

Data sheet: PDF | HTML
Hall-effect latches & switches

DRV5033High voltage (up to 38V), high bandwidth (up to 30 kHz) omnipolar switch

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

TPS709150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F67791APolyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, 512KB Flash, 32KB RAM

Data sheet: PDF | HTML
RS-232 transceivers

TRS32323- to 5.5-V dual channel 250kbps RS-232 line driver/receiver with +/-15-kV ESD protection

Data sheet: PDF | HTML

Start development


Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* Design guide Magnetic Tamper Detection Using Low-Power Hall Effect Sensors Design Guide Jan. 07, 2015
Technical article You can be an electromechanical engineer Nov. 10, 2017
Technical article Meter anti-tampering: Stopping those pesky meter tamperers Jan. 12, 2016

Related design resources

Reference designs

TIDA-00601 Multi-phase Energy Measurement with Isolated Shunt Sensors Reference Design TIDM-3PHMETER-ROGOWSKI Implementation of a 3-Phase Rogowski Coil Based Watt Hour Meter Reference Design TIDM-AUX-MODULE Battery Management and Auxiliary Power Supply Options for E-Meters

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. ​​​​​​​​