# Op Amp Power Supply Consideration

When choosing a split supply for an op-amp circuit, how do I determine my power supply requirements? For a single supply, this is easily determined by finding the required current - but how is power distributed in split supplies? For example, if the op-amp in question states it draws 100mA - does this mean thatt both the negative and positive power supplies should be capable of sourcing 100mA?

Thanks!

• Even more than adequate power supply is adequate (and dampened) -VDD and +VDD bypassing capacitors. Assume 10nH inductors everywhere; use formula sqrt(L/C) to compute the dampening resistor. – analogsystemsrf Aug 24 '17 at 16:59