- Blog entry posted in 'Uncategorised', October 21, 2012.
This is just a bit of a summary of my work on Texas Instrument's 16-bit ADC chip. For your information, TI also has 20-bit and 22-bit ADCs (phew!!!) and I ordered some samples of theirs. I feel that PICs, as useful as they come, have ADC modules which are, to say, not very useful for practicality. 10 bits may be useful for a small range with only 1023 data sets, but I feel that a more precise resolution is needed if we want to bring PIC into serious business. So, with a bit of tweaking, one can add a 16-bit ADC to their custom main boards and continue with more kickbutt projects.
Please take a look into my video of comparison between the performance of TI's ADS1100 versus PIC's hardware ADC:
http://www.youtube.com/watch?v=CQCrYVnxWs4
One can see the difference of the stability of the least significant bit of PIC's hardware ADC, at 5V/1023=0.0045V compared to TI's ADS1100 5V/32767=0.00015V! At that resolution, ADS1100 shows a lot more stabilty.
My code can be found here if you want to use the ADS1100.
My original article on this project can be found here if you're interested.
Cheers,
Vizier87.
3v0, November 19, 2012
Some of the newer PICs have 12 bit ADCs. Maybe you could have a look at their stability?
Vizier87, November 19, 2012
Hi 3v0, thanks for the comment. I do have the dsPICs with 12 bit ADCs. Currently I'm working on the TI's 22-bit ones, but the packaging is a bit more difficult to solder. :) Then I'll go to Microchip's 12-bit ones. Cheers.
