these devices consist of four independent
high-gain frequency-compensated operational
amplifiers that are designed specifically to operate
from a single supply over a wide range of voltages.
operation from split supplies is also possible
when the difference between the two supplies is
3 v to 30 v (for the lm2902 and lm2902q, 3 v to
26 v) and vcc is at least 1.5 v more positive than
the input common-mode voltage. the low supply
current drain is independent of the magnitude of
the supply voltage.