OPA quiescent current

[Johnny_YU]

Hi, all

in all OPA Datasheet , i can find a parameter named "Quiescent Current per Amplifier", and its unit is uA.

does this unit "uA" mean: uA per second or per minute , or others?

 

[Audioguru]

The "quiescent current" is the continuous current when the opamp is quiescent (with no signal). uA is microamps of current.

 

[Johnny_YU]

The "quiescent current" is the continuous current when the opamp is quiescent (with no signal). uA is microamps of current.

if the supply voltage is 5V and quiescent current is 1uA, can i calculate the power dissipation in one minute use the formula "P = 5v * 1uA * 60sec "? is that correct?

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The "quiescent current" is the continuous current when the opamp is quiescent (with no signal). uA is microamps of current.

if the supply voltage is 5V and quiescent current is 1uA, can i calculate the power dissipation in one minute use the formula "P = 5v * 1uA * 60sec "? is that correct?

 

[crutschow]

if the supply voltage is 5V and quiescent current is 1uA, can i calculate the power dissipation in one minute use the formula "P = 5v * 1uA * 60sec "? is that correct?

No.
That equation calculates energy in Joules (Watt-seconds), not power.
Power is V x A, or 5V x 1µA = 5µW.
You do not use time in the equation when you calculate power since power is energy per unit time. 1W = 1 Joule/second

 

[Johnny_YU]

No.
That equation calculates energy in Joules (Watt-seconds), not power.
Power is V x A, or 5V x 1µA = 5µW.
You do not use time in the equation when you calculate power since power is energy per unit time. 1W = 1 Joule/second

i get it, thank you!