Power Electronics / Power Management


Power meter system-on-chip

26 January 2005 Power Electronics / Power Management

TDK Semiconductor's power meter IC, the TDK 71M6511, integrates a 21 bit delta-sigma converter with three sensor channels, 32-bit compute engine, MCU, RTC, LCD driver, and precision voltage reference and is intended for tamper resistant residential time-of-use (TOU) and pre-payment metering. With on-chip digital temperature compensation and TDK's single converter technology, the device delivers superior linearity over 2000:1 current range. Requiring a single 3,3 V capacitive supply circuit, the 71M6511 consumes under 9 mA to operate (4 μA in battery backup). It includes 64 KB of Flash 7 KB RAM, realtime clock, 5 V LCD boost, 2+ UARTs, and an I²C interface.



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