On Mon, 5 Jun 2017 01:18:59 +0100 Adrian Godwin <artgod...@gmail.com> wrote:
> Where do digital sensors (e.g. ds1820 and some more recent parts from TI) > fit into this ? AFAIK, these are all band-gap temperature sensors. But unlike a discrete sensor, you have the problem that they only contain a low resolution ADC on die (somewhere between 8 and 14 bit). If your goal is to measure temperature and report it with an accuracy of about 1°C, then these are the easiest to use sensors you can buy. Sensor noise doesn't really matter with them, as it is dominated by the low ADC resolution. I don't have any long term stability data on those, but given their use-case I do not think that they are very stable. Although long term stability might not be an issue at all, again due to low ADC resolution. If you need better precision, accuracy, or stability, then choosing one of the modern delta-sigma ADCs that directly support thermistors (e.g. like AD7124) is not much more difficult, though a bit more expensive (around 10USD instead of 5USD like for an TMP107). Additionally you need to calbirate the system, which means you need a reference temperature sensor and a setup with which you can produce different temperatures. Though for an oven kind of temperature control, one can live without calibration. Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their views to fit the facts, they alter the facts to fit the views, which can be uncomfortable if you happen to be one of the facts that needs altering. -- The Doctor _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.