As a rule of thumb, for designing simple circuits, which have things like potential dividers for reference voltages, NTCs, loaded MOSFETs for low frequency signal switching etc. what is a reasonable current to load such things with, so that there is minimal noise in the generated signal, but no excessive current demand from the power supply. (Assuming the thing the signal is connected to draws negligable (u/pA) current from the signal itself / switching times are not critical etc.)
Generally I figured around 1mA, but then for larger, battery powered applications all these 1mAs add up..
A couple of very simple (illustrative) examples:
Generally I figured around 1mA, but then for larger, battery powered applications all these 1mAs add up..
A couple of very simple (illustrative) examples: