This is a general question: What is the power consumption of an Op Amp with supply voltage Vcc, output voltage Vrms and a resistive load R?
Ignoring the amp's quiescent current I would say:
Power = Vcc * Vrms / R
But this sounds strange: If the load is 16 Ohm, Vrms=0.1V and Vcc = 1.8V
then the amp draws 11mW to supply only 0.6mW of power to the load, that's 5% efficiency. Aren't op amps nearly ideal devices?
Any thoughts are welcome.
Ignoring the amp's quiescent current I would say:
Power = Vcc * Vrms / R
But this sounds strange: If the load is 16 Ohm, Vrms=0.1V and Vcc = 1.8V
then the amp draws 11mW to supply only 0.6mW of power to the load, that's 5% efficiency. Aren't op amps nearly ideal devices?
Any thoughts are welcome.