Hi Chelsea, I have cc beagleboard because someone else might learn from this discussion. Looking at the link you provided, it won’t work because ADS1278 requires a differential input. Look at page 39 for circuits that will work for you.
Regards, John > On Dec 3, 2015, at 3:52 PM, Chelsea Orefice <coref...@smith.edu> wrote: > > My apologies. Please let me know if this link works. (You will need to just > copy and paste in search bar). If that doesn't work I will send it as an > attachment. Will also look at the diagram as well. > > http://cnx.org/resources/72628d36f0c24bc80ff94e5c0bf6df2b27a86751/opamp4.png > > Thanks again, > Chelsea > > On Thursday, December 3, 2015 at 6:46:49 PM UTC-5, john3909 wrote: > Look at page 39 for a suitable input circuit. > > Regards, > John > > > > >> On Dec 3, 2015, at 3:03 PM, Chelsea Orefice <core...@smith.edu >> <javascript:>> wrote: >> >> Hi John, >> >> Thanks for getting back to me. I was actually looking at that same ADC >> converter as you posted in your reply. Just looking for some clarification >> on a few things. What type of error would a simple resistor divider >> introduce into the system? I am currently using a cascaded inverting op amp >> system. Not really sure if this will scale the input voltage to a level that >> is compatible with my ADC. >> >> The circuit diagram looks like this: >> >> >> Looking forward to your reply, >> Chels >> >> On Thursday, December 3, 2015 at 5:07:41 PM UTC-5, Chelsea Orefice wrote: >> Hi everyone, >> >> I am new to the world of using MCUs and am looking for some assistance on a >> project that I am currently working on. To sum things up quickly, I am >> building a data aggregation unit that can convert analog voltage readings to >> digital values that is to be stored on a USB or SD card. The DAU will >> collect 3 types of signals, a buffer signal, clipped signal, and a signal >> passed through a LPF. In the end, the data should be stored as either a >> MatLab file or .xml file. However, I am facing a few road blocks relating to >> my design. >> >> 1.) I need to use a 24 bit ADC for high resolution purposes based on design >> requirements that were just given to me as I will be collecting data from >> .1mV to 50V and it has to have a high sample speed rate. Has anyone >> connected an external ADC to the BBB? If so, what was the brand of your >> external ADC? How did you connect the ADC to the BBB? (It'd be greatly >> appreciated to be able to see a design). >> >> 2.) If you have had a similar project to this, was wondering how you went >> about it. Any advice would be greatly appreciated. >> >> >> As I said before, all of this is very new to me. So thank you for taking the >> time to help me out. >> >> Chelsea >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> <http://beagleboard.org/discuss> >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
