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MCUs promise reliable energy measurement

Posted: 03 Jul 2009     Print Version  Bookmark and Share

Keywords:microcontroller  MCU  e-metering application 

Texas Instruments Inc. has released ultra low power MSP430F471xx microcontroller series in support of three-phase e-metering applications. The F471xx SoC metering solution offers simultaneous sampling of voltage and current as well as tamper-detection for efficient and reliable energy measurement.

Three-phase energy metering is really made possible with the six (or seven) 16bit sigma-delta converters. Below is a diagram of how the seven converters (the seventh on the neutral wire) and the MSP430 can provide a full three-phase monitoring solution.

Key features and benefits of the MSP430F471xx three-phase e-metering MCU include:

• Integrated MCU solution with dedicated 16bit sigma delta converters for three-phase e-metering applications

• Precise energy measurements with better than 0.1 per cent accuracy

• Well suited for power-line monitoring with simultaneous sampling of all channels

• Ultra low power consumption when LCD, real-time clock and other peripherals are in use, helps maintain data when back-up battery is used during power outage

• Support of tamper detection and high-precision measurements like temperature and humidity with 7th sigma delta converter for measurement of current and voltage signals

• Flexible memory options with up to 120KB flash and 8KB RAM

• Development made easy with code examples, evaluation module and application note that details faster calibration to jump-start design.

F471xx MCUs are priced between Rs.281.67 ($5.75) and Rs.389.45 ($7.95) for 1K units and are available now along with the Rs.3,674.02 ($75) MSP-TS430PZ100A target board. In addition, these devices are fully compatible with the Rs.7,299.05 ($149) MSP-FET430U100A flash emulation tool and e-meter EVM (available via local sales support).

- Steve Bitton
Industrial Control Designline

For application notes and technical articles on microcontrollers, visit Embedded Design India.

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