Actually once I'd written it out the issue, I realized that (a) the MCP3208 has enough resolution (5/4096 = 0.001v per bit) so increasing to 0-10v on 12bits wouldn't help (10/8192 = 0.002v per bit), and (b) I think the accuracy of the system is lost elsewhere.
Additionally I'd probably lose a fair bit of resolution with 14bit/16bit due to noise.
Yes, the MCP3208 makes it all very easy with the Propeller's 3.3 volt.
I just finished a build for the ADC8032 which requires 5.0 power and is only 8 bits. I had to add three 2N700 level shifters to get it all working -- lots of extra work. I only did so because I had the chip here.
Actually once I'd written it out the issue, I realized that (a) the MCP3208 has enough resolution (5/4096 = 0.001v per bit) so increasing to 0-10v on 12bits wouldn't help (10/8192 = 0.002v per bit), and (b) I think the accuracy of the system is lost elsewhere.
Additionally I'd probably lose a fair bit of resolution with 14bit/16bit due to noise.
Google Bonnie Baker and ADC; will return a pile of good stuff.
Javalin
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Additionally I'd probably lose a fair bit of resolution with 14bit/16bit due to noise.
I just finished a build for the ADC8032 which requires 5.0 power and is only 8 bits. I had to add three 2N700 level shifters to get it all working -- lots of extra work. I only did so because I had the chip here.
Google Bonnie Baker and ADC; will return a pile of good stuff.
FF
http://www.planetanalog.com/document.asp?doc_id=528347&site=planetanalog