A sanity check please.
It occurred to me that in applications where batteries need to last for a long time (years) a DS18B20 would not be a suitable sensor for temperature measurement, due to the fact that it takes quite a while to measure and transmit the temperature to the microcontroller. 12 bits accuracy requires 750 ms reading time + the transmission, etc. Most times 12 bits accuracy is not really needed, but still we would be looking at current draw of tens of second.
Does it make sense?
So I started to look at high precision thermistors with +/- 0.1 deg C accuracy.
Thermistors could be sampled in a shorter amount of time, even with some averaging.
Is this true, after everything that goes into making an accurate measurement is taken into account?
http://www.littelfuse.com/~/media/electronics/datasheets/leaded_thermistors/littelfuse_leaded_thermistors_interchangeable_thermistors_standard_precision_ps_datasheet.pdf.pdf
The datasheets mentions different R-T characteristic curves (A, R, J, ....).
I am struggling to find information on the exact definition of these curves. What are they? Does anyone have any pointers on where I could look?
Thanks in advance
Riccardo
It occurred to me that in applications where batteries need to last for a long time (years) a DS18B20 would not be a suitable sensor for temperature measurement, due to the fact that it takes quite a while to measure and transmit the temperature to the microcontroller. 12 bits accuracy requires 750 ms reading time + the transmission, etc. Most times 12 bits accuracy is not really needed, but still we would be looking at current draw of tens of second.
Does it make sense?
So I started to look at high precision thermistors with +/- 0.1 deg C accuracy.
Thermistors could be sampled in a shorter amount of time, even with some averaging.
Is this true, after everything that goes into making an accurate measurement is taken into account?
http://www.littelfuse.com/~/media/electronics/datasheets/leaded_thermistors/littelfuse_leaded_thermistors_interchangeable_thermistors_standard_precision_ps_datasheet.pdf.pdf
The datasheets mentions different R-T characteristic curves (A, R, J, ....).
I am struggling to find information on the exact definition of these curves. What are they? Does anyone have any pointers on where I could look?
Thanks in advance
Riccardo