Programmable metering devices with low-cost analog front ends [Texas Instruments]-EEWORLD

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April 8, 2011, Beijing

Recently, Texas Instruments (TI) announced the launch of the MSP430AFE2xx series of metering analog front-end (AFE) ultra-low-power 16-bit microcontrollers for metering and smart grid applications. The low-cost MSP430AFE series is part of TI's leading embedded processing product line, providing the industry's first programmable single-phase metering devices supported by multiple communication interfaces. This series of microcontrollers supports system partitioning for metering applications such as electricity meters, home automation, auxiliary metering, and energy-saving systems, enabling highly flexible independent high-quality measurements. The MSP430AFE series is built on a 16-bit RISC architecture and supports a 12MHz system frequency, which is three times faster than similar competing devices, thereby improving functionality. Three independent 24-bit Σ-Δ converters with anti-tampering functions help this series of microcontrollers achieve energy accuracy errors of less than 0.1% over a wide dynamic range of 2400:1.

In addition, the MSP430AFE2xx family also has a variety of tools, demonstrations, and EVM support, which can provide developers with several options to start evaluation and quickly enter production. The MSP430 energy watchdog demonstration with RF function can display the power usage of any plugged-in device on the LCD display, which can help users manage energy use and save money. The programmable MSP430AFE EVM can be used as a calibrated meter to test the new MSP430AFE2xx. In addition, the MSP-TS430PW24 target board and MSP-FET430U24 flash emulation tool can be used to program and debug MSP430AFE devices.

Key Features and Benefits of the MSP430AFE2xx Family
• Single-phase metering analog front end supports 0.1% accuracy error over a dynamic range of 2400:1;
• Three 24-bit Σ-Δ analog-to-digital converters (ADCs) sample simultaneously to support single-phase measurement and anti-tampering capabilities, while using a small 24-pin TSSOP package to minimize space savings;
• Programmable MSP430AFE devices provide highly flexible system design and high performance;
• TI's comprehensive libraries for energy, power, voltage, current and several other important metering standards support fast and robust single-phase metering implementations;
• Up to 16KB of flash and 512B of RAM support programmable memory through SPI and UART interfaces for high design flexibility;
• Integrated peripherals including 16-bit timers, watchdogs and hardware multipliers help customers control tasks in ultra-low power modes for math-intensive calculations;
• A wide range of development tools, EVMs and demos, as well as free downloadable software debuggers and compilers (including Code Composer Studio™ IDE and IAR Embedded workbench) can speed up production.

TI's broad portfolio of MCUs and software

From general-purpose ultra-low-power MSP430 MCUs to 32-bit MCUs based on Stellaris® Cortex™-M3, to high-performance real-time control TMS320C2000™ MCUs, TI can provide designers with the most comprehensive microprocessor solutions. By making full use of TI's complete hardware and software tools, extensive third-party products and technical support, designers can accelerate the time to market.

TI's Smart Grid Solutions

TI provides customers with smart grid solutions through innovative products, advanced software technology and compatible integrated system solutions. TI's smart grid products integrate unique practical silicon technology, software and supporting technologies, which can be fully applied in smart grid infrastructure construction, practical metering, and home and public building automation systems.

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