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Send til en ven   Udskriv4/3 2010 kl. 13:38
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Low power trådløs MCU

Silicon Labs. introducerer low-power, wireless microcontroller, der sigte mod homeautomation og meter-applikationer (in english).

Answering the need for energy efficiency in home automation and metering, Silicon Laboratories Inc.  introduces what the company claims is the industry's lowest power single-chip wireless microcontrollers (MCUs). Silicon Labs' new ultra-low-power Si10xx wireless MCU family addresses the power and RF requirements of battery-operated home automation systems, smart meters, in-home utility monitors and security systems.

The demand for smart energy technology continues to grow each year as government initiatives mandate upgrades to the grid, as well as adding intelligence to meters that measure water, gas and heat. The market for smart home products, such as lighting and HVAC controls, in-home utility monitors and home security systems, is also on the rise, driven in part by the desire to conserve energy and by the expansion of home automation services and standards-based wireless technologies.

Today's smart home/smart grid applications merge wired/wireless connectivity and embedded control with power-efficient design to maximize battery life. The ultra-low-power Si10xx wireless MCU family is ideally suited for these battery-operated systems with RF links, as well as for many other embedded wireless applications that require ultra-low power consumption.

The Si10xx wireless MCUs combine a 25 MHz 8051 core, EZRadioPRO sub-GHz RF transceiver, up to 64 kB of flash and up to 12-bit ADC - all in a compact 5 mm x 7 mm package. 

The wireless MCUs has an active-mode current consumption  of 160 microamps per MHz. In sleep mode, they consume only 615 nanoamps with an active 32.768 kHz real-time clock (RTC) and down to 315 nanoamps with an active RTC and a low frequency oscillator (LFO). In deep-sleep mode, they can operate on as little as 25 nA with full RAM retention.

The Si10xx family's ultra-low-power architecture and fast wake-up time (2 microseconds) greatly extends battery life in both lithium and alkaline battery applications. The Si10xx architecture also features a dc-dc boost converter designed to supply large loads with extremely high efficiency.

The dc-dc converter supplies power needed for periods of RF transmission and reception with efficiencies of up to 90 percent. As a result, developers can design embedded wireless systems capable of 25 percent longer battery life over alternative solutions with no degradation in MCU or radio performance; in some system configurations, an Si10xx device can extend battery life by as much as 50 percent.

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