When talking about separating digital and analog, would one use two separate supplies off the same source - i.e. two 5v voltage regulators, one supplying analog, one supplying digital? Then simply connect the grounds?
Only if the current is negative.
I know people say its due to resistance, but by what formula?
QuoteI know people say its due to resistance, but by what formula?Ohms law, suppose you have a ground lead with a 1A current flowing through it an a 1 ohm resistance.Then at one end of the ground lead, the one at the supply, will be 0V and the other end will be 1V. Half way along that lead it will be 0.5V. So if you connect something else half way along that ground lead it will not be ground but 0.5V.Therefore connect all current carrying ground leads together at one point. This is called a star configuration.
You're not so grumpy after all!
A chip with both analog and digital functions is considered a hybrid IC
Between the two.