Re: ADC negative VREF on 18F4550 question
Hi,
For such a simple task, I would use a simple capacitive voltage doubler, driven by the µP clock output, i.e. and then use a linear regulator ( or a voltage ref ... or TL431 ).
using some MAX 630 ( a max 232 or ICL 7660 could also do it ... ) as a step-up converter is there somewhat overkill.
Max 761 ANs are to look at too ...
a convenient one had been the MAX 879 ... but production stopped !
Alain
************************************************** ***********************
Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
************************************************** ***********************
IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
*****************************************
Bookmarks