How to determine how much current the op amp power supply needs? For example, this -6V is only used to supply power to the op amp. How to confirm the current demand of the -6V power supply for this op amp?
Juliet ポストする July 23, 2020
Only need to evaluate the power consumption of the op amp itself + power consumption of the ground loop;
The power consumption of the op amp itself depends on the maximum value of the specification, and the circuit above the ground loop also depends on the Vo output load. The power consumption of other parts is uA level, which can be ignored in the mA level power supply.
Diamond ポストする July 23, 2020
It is the above algorithm. There should be a power consumption curve in the specification, and the power consumption can be determined according to the power consumption curve.
Jerry ポストする July 23, 2020
The influence of the output load must also be considered. The current of the output load is also obtained from the power supply.
