Hello,
I would like to ask about CM5 enviromental temperature. In specification there is Recommended environmental temperature: 0 ～ 50°C, and I would like to ask if it is only recommended, or there is limit and outside of this range, cm5 will not work. I am interested in temperatures below zero. For example if i create device using cm5 will it work in winter, -10 to -20°C?
Best regards Michal
Radxa CM5 enviromental temperature
It seems like Ambient Operating Temperature for RK3588S2, is from -20 to 85. Are there any reason for CM5 to operate only from 0-50?
Often the difference between a chip and a board regarding operating temperatures is that the board needs to be sealed in dry air so that no moisture develops around some chips’ pins at low temperatures. Maybe for your use case it could be sufficient to spray some varnish on top of it to isolate contacts and BGA chips. But you’d need to do that in a dry atmosphere to ensure that you don’t enclose tiny particles of water that could condense and make undesired contacts. E.g. imagine a DC-DC regulator’s feedback line that employs a 1Megohm resistor on the low side that sees its value change by 10% due to some dirty water on it, it could change the output voltage and fry a chip.
A possible test sometimes consists in placing your board on a Peltier cooler and observing where ice develops, then removing it and observing where water drops appear.
Another thing to keep in mind is that some chemical capacitors don’t like temperatures below 0°C, but I doubt you’d find some on such a small board.
Operating temperature is not only dependent on CPU, but also on the working temperature of other components, we can promise it works fine under 0~50, it maybe can work under zero such as -10~-20, but we don’t know whether it can run stably for a long time under -10 ~ -20. we have industrial grade product CM3I and ROCK 3B, which can work under -20°C, you can evaluate it.
We need performance of RK3588, are there any plans for similar CM5I(RK3588J)? If so, we could develop prototype using CM5 and than swap in production with CM5I when available.