Texas Instruments’ highly integrated MSP430F47x4 reduces power consumption to extend battery life while cutting components count. With standby power consumption as low as 1.5 μA, the 16-MHz MSP430F47x4 ultra-low power microcontrollers extend battery life to over 12 years in one- and multiphase automated meter-reading applications. The F47x4 series MCUs feature several low-power modes allowing the meter to “sleep” with almost no power-drain between readings. An extremely fast wake-up function brings the device to full clock speed within 6 μs. Combined with a fast shutdown capability, this “instant-on” wakeup minimizes time spent in active mode. The result is fewer costly service calls for battery replacement.
The device includes up to four individual 16-bit sigma-delta analog-to-digital converters, a 32-by-32-bit hardware multiplier, a 160-segment LCD driver with contrast control, up to 60 kbytes of flash memory, and a real-time clock. This high level of integration produces a five-to-one reduction in system components. TI’s utility metering portfolio also includes devices for water- and gas-metering, as well as power-line communications and RF interfaces for automated meter reading. The previously available MSP430FE42xx series of devices includes an embedded signal-processing unit that integrates the metering function—including current and voltage measurement and power calculations—for faster system development and a reduced bill of materials.AVAILABILITY
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The MSP430F47x4 series of MCUs start at $7.50 in quantities of 1000.
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