Silicon Laboratories has introduced a range of low-power single-chip wireless microcontrollers (MCUs). The new 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 devices 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 x 7 mm package. The wireless MCUs offer active-mode current consumption of 160 μA/MHz. In sleep mode, they consume only 615 nA with an active 32,768 kHz real-time clock (RTC) and down to 315 nA 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 low-power architecture and fast wake-up time (2 microseconds) extends battery life in both lithium and alkaline battery applications. The architecture also features a DC-DC boost converter which supplies power needed for periods of RF transmission and reception with efficiencies of up to 90%. The integrated power amplifier (PA) and low-noise amplifier enable an RF link budget of greater than 140 dB without requiring active external elements.
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