A simple voltage divider on any inputs greater than 10v will work fine. If you mean voltage divider as a kind of voltage supply regulator then no, don't do it. Most especially ADCs. I also assume you are not talking about sampling audio with this ADC but data acquisition? Audio sampling needs to be done with a real codec IC. Standard ADC's sampling audio are really poor quality due to aliasing artifacts and other issues. The difference between say a burr-brown pcm codec (audio) and the ADC's you mention are *clearly* heard, speaking personally.
Btw: The impedance of the ADC input can slightly affect the value of the voltage divider. You can find the impedance in the datasheet and adjust your ladder if needed...in most cases the impedance is negligable for most people. Also, lower overall impedance of the dividor will make the ADC input impedance more negligable, but will draw more power. 5-20k is prob suitable. I am not sure what kind of distance sensing could be done, but I am interested in it too. I think sonic wouldn't be accurate enough. Laser would but I don't know how to do that yet, but sounds awesome. ;) Anything else? I know many people are just using bump probes to do 3d scanning. --- simple and digital. C -----Original Message----- From: John Thornton [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 01, 2008 8:18 AM To: [email protected] Subject: Re: [Emc-users] Emc-users Digest, Vol 20, Issue 52 Hi Kirk, For the single channel ADC do you have a chip picked out? I think that I'll just use the MAX186 in the article and ground the unused inputs unless you have a better one. A quick google search and it seems to be used a lot. Nosing around on Maxium's site I found some chips that take 0-10v like this one http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3998 Do you think it could be used? If you could hook an analog sensor to something like this then WOW! Distance sensing and more... Does a simple voltage divider circuit sound good enough to scale the voltage down to what the chip needs? I'm familiar with C, and just found the comp tool. I'll see what I can figure out... This is kinda new ground for me so any tips would help... Thanks John ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
