SparkFun Forums

[mac]

Hi all,

I have in mind a project which involves a set of nRF chips used in very short range (<5m) but in quite harsh condition: transmitter temperature may vary from -10C (14F) to 37C(98F body temp), and receiver may come less than -10C.

So this means that both set could either operating at same (low) temperature, or with a huge difference between them.

Is there some people with practical experience about these conditions?

[leon_heller]

-10C won't be a problem for the electronics, it's within the standard industrial range for components. You need to select the battery with some care, many have problems even at -10C.

Leon

[lyndon]

I haven't used that particular chip, but I have used a Bluetooth module outside at sub 0F temperatures. I used a NiMH battery.

Check the version of the chip. While -10C is within the Industrial/Automotive range as leon_heller said, Commercial range is normally only 0-70C.

[leon_heller]

The Nordic chips are Industrial range.

Leon

[RonnyM]

Check crystal tolerances. Some crystals may be pulled enough to affect operating frequency. Also, the loading caps may cause issues if they are not npo types.
Ron

[mac]

Yes I know that nRF are rated to -40, but I also know from experience that it doesn't mean anything, especially for RF subsystems.
Since it uses standard 60ppm crystal, I just want to make sure that temp differences are ok.

Anyway, I have ordered some nRF24L01 and nRF2402 to play with.