|
[quote="CptTitanic"]Probably because it's not tested/characterized over temperature, and hugely process dependent.[/quote]
Thanks for responding
The process generally doesn't change unless there is a hardware revision so once characterized it should be fairly consistent. Mostly it's a 'does it drift greater than +-1% over it's rated temperature' is my real question. But knowing how much it can drift and over what ranges is rather helpful (I've found). I have to do this with any and all oscillators used in industrial applications (they aren't used in a temperature controlled environment).
[quote="CptTitanic"]You'd presumably therefore have to run your parts over temperature to characterize them individually.[/quote]
I hate doing those kind of tests, just setting up such a test can require a considerable amount of planning (monetary units as well) to be correct, and one would need to have enough samples as well (remove statistical anomaly issues).
Most people I guess don't see the value of knowing what an RC oscillator does over temperature. However if you buy an oscillator it comes with that data (or the parabolic coefficient if a crystal). I was hoping that the RC oscillators had been treated just like any other oscillator and tested for drift over temperature. That can become an annoying issue, when the temperature is guaranteed to vary, without much effort on the unfortunate designers part.
Anyhow thank you for apprising me of what there was.
|
Forum
