I'm not sure. I read somewhere that the internal reference really should not supply current, but looking at the schematic, it looks like it's powered from the VDD_1V8 1.8 V rail, which can supply a total of 400 mA (according to the SRM). I don't know how much the rest of the system draws.
I have a 5K and 10K pot on mine, seems to work, but in the next version I will put a voltage follower on it. > On Jan 29, 2015, at 14:59 , Rafael Vega <[email protected]> wrote: > > > Hi, I need to connect 12 potentiometers to the adc inputs in the BBB (through > an analog multiplexer). I have found that if I use potentiometers with lower > resistance values (2Kohm), the input is less noisy than if I use higher > resistance pots (500KOhms). Since the pots are "powered" by VADC and AGND > (1.8Volts), I need to know how much current I can draw from these two pins. > Anyone? :) > > -- > 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 [email protected]. > For more options, visit https://groups.google.com/d/optout. -- Rick Mann [email protected] -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
