3 ms·
I did a brief search, and it seems that at 1MHz, all of the chips discussed in this discussion so far (ATTiny, MSP430, and STM32) are all 200 uA or less, while
by dragontamer 4y ago
I did a brief search, and it seems that at 1MHz, all of the chips discussed in this discussion so far (ATTiny, MSP430, and STM32) are all 200 uA or less, while _fully active_.
Sleep modes bring that down below 50uA.
So on 2x AA batteries (~3000 mA-hours), it seems like these datasheets are telling me that all these chips can consistently hit 2.5 _YEARS_ of battery life? Or 6.5+ _YEARS_ of sleep-battery life?
I'm surprised at how low power modern microcontrollers are. The power-consumption metrics continue to get better-and-better year over year.
- ilyt 4y agoIt's interesting tradeoff, because generally the bigger transistor the less quiescent current it has (=lower power when everything is off), but on the other side the bigger transistor the higher uA/MHz consumption
- squarefoot 4y agoA single ultra long life Li-SOCl2 D cell like the Tadiran TL5930/S could probably power one of these chips for no less than a decade. https://www.mouser.com/ProductDetail/Tadiran-Batteries/TL5930-S?qs=Yk42LiOZU8SeefDe1%2FzLBA%3D%3D https://www.mouser.com/ProductDetail/Tadiran-Batteries/TL593...
- snvzz 4y agomsp430 will get you into nA territory[0]. 0. https://www.edn.com/ti-msp430-mcu-breaks-500-nano-amp-barrier/ https://www.edn.com/ti-msp430-mcu-breaks-500-nano-amp-barrie...