Hello,
We are currently designing a small battery powered wireless IoT device. We are still in early design stage and are investigating several microcontrollers part-numbers. And I would like to know if you have additional data for some parts.
Because our sleep/wake duty cycle will be high, in our first estimation sleep current was the most critical characteristic. Our first estimation was based on an MCU with around 2µA sleep current, but lower is of course better. We have found several MCU which could work including several from TI. However I would like to know if you can provide maximal (in addition to typical) data regarding the power consumption of your devices and at higher temperature since our device will live at a certain range of temperatures? Ideally, something similar to what STMicroelectronics provides in their datasheet, for instance for the STM32WB15 (www.st.com/.../stm32wb15cc.pdf). In section 6.3.7, they provide tables not only with typical consumption, but also with maximum (+-4 sigmas) and at 25°C, 55°C, 85°C, and 105°C (though in our case 105°C is outside of the working range). These characteristics show that there is a substantial difference between typical and maximal, especially in the low power sleep modes, which I assume would be similar for TI parts and we want to be able to account for the worst with a good confidence level. You do provide data of evolution over temperature as a graph, but this is for typical and not maximal.
I chose CC2652R for this support ticket as it seems to be one of the lowest current in sleep mode, but we are still open to other BLE components with good compromise on power consumption and price if you have any recommandations.
Best regards,
François L.