Toshiba Corporation today announced the launch of a new microcontroller, the TMPM311CHDUG, as the latest addition to its ARM® Cortex®-M3-based TX03 series. This MCU is designed for smart meter applications. Sample shipments will start in April, with mass production scheduled to start in September, 2015. A power measurement analog front-end (AFE) for single-phase and three-phase smart meters requires simultaneous high-precision current measurement, voltage measurement and power calculation. A 24-bit delta-sigma (∆∑)-type AD converter incorporated in the new product enables high-precision current measurement, voltage measurement and power calculation at the same time. This ensures the realization of high-end smart meters and metrology devices.
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Key Features of the TMPM311CHDUG include: Built-in four-channel 24-bit ΔΣ-type AD converter: Measures current and voltage simultaneously, with high precision. The allowance for measurement error of single-phase power calculation is within 0.1 %. Three-phase power meter solution: Simultaneous current and voltage measurement for up to eight channels is supported by using two units of the microcontroller in an interlocking manner. Built-in low-noise variable gain amplifier in each conversion channel of the 24-bit ΔΣ-type AD converter: Enables high-precision measurement for current from a current sensor. This supports both power calculation meter and various sensor equipment.
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