STM32L0: How low can you go? Ultra-low for Consumer, Health, and Industrial Apps

STMicroSponsored post by Stuart McLaren, STMicroelectronics

Would you believe a fitness tracker that can run for up to two years on a non-rechargeable coin-cell battery?

How about a domestic smoke detector powered by non-rechargeable batteries that would require fewer, less frequent replacements, reducing the cost of ownership and the environmental burden of a ginormous pile of spent batteries.

Or that the glucose meters and all those nifty health and fitness gadgets you (and others) create and use can be made with smaller batteries, making them more affordable across the board.

These achievements, and more, are possible with the STM32L0 ultra-low-power series, featuring a 32MHz ARM® Cortex™ M0+ processor core and a 12-bit Analog-to-Digital Converter (ADC) that sets a new standard for low power consumption.

How low?

The ADC consumes just 40µA at a conversion speed of 100ksps, rising to just 200µA at 1.14Msps. Combine that with the outstanding power efficiency of the processor core, the ultra-low-power peripherals, ST’s carefully tuned low-power processing technology, as well as the industry’s smallest variation in power consumption over the 25°C – 125°C temperature range, which leads to record low consumption levels at elevated temperatures. And you have a microcontroller that is ideally suited for (distributed) industrial sensor applications that rely on batteries or energy harvesting.

Offered in three lines, the STM32L0 offers exceptional power consumption in several modes including 139 µA/MHz @ 32MHz, 87 µA/MHz using an optimized mode, and 400nA in Stop mode with full RAM data retention and a 3.5µs wake-up time. The series also features up to 64KB of Flash memory, up to 8KB of SRAM, and 2KB of embedded true EEPROM. A built-in hardware oversampling capability also enables 16-bit ADC resolution.

STM32L0 devices with integrated USB full speed 2.0 interface support battery-charger detection and link power management. Crystal-less operation of the USB is enabled via a built-in 48MHz oscillator. All the lines offer built- in hardware engine encryption (AES) as an option.

But you don’t have to take my word for it. Visit us at EE Live! And see for yourself. Attend our free technical seminars which will be hosted daily at the ST-Mouser Theater at the STMicroelectronics’ booth (#1318). The full schedule of seminars is available now at www.st.com/eelive2014 . See you at the show!