Hi,
I'm looking for a precision data acquisition solution of 24-bit for arduino, could you please indicate the best and most practical solution?
Thanks
(deleted)
What data do you want to read? Are you an Arduino newbie or a general newbie to electronics?
24 bit resolution is not accomplished by just buying a suitable chip and plugging it into a breadboard. You will need some serious knowledge of board design, choosing a flawless power supply, filtering, shielding etc.
@spycatcher2k, please be constructive in your answers
@shmnm, please elaborate your project as it is not clear what your goals are.
In the case in particular, I want to acquire data from extensometers and convert them from analog to digital, but for that the resolution of 10 bits is little, so I need to add a converter of 24 bits. (Note: I am not from the electronic area).
Thanks for your help
Take a look at this one
24 bit is a very high resolution - 16,777,216 steps to be exact, or 0.3 µV on a 5V scale. Do you have any idea whether your intended sensor even has that high precision?
You will easily see lots of noise from EM fields (from your own AC wiring to nearby radio stations and your mobile phone) so high quality shielding and shielded wiring is a must. You may even be able to see things like effects from temperature differences of your connections (copper + solder = thermocouple) at this level of precision.
You sure 16 bit (65536 steps) is not enough for you? Without special measures the first 8-10 bits of a 24-bit signal are likely to be drowned in noise.