Hello,
Good day.
May I ask for confirmation if our understanding of the quiescent current is correct?
1. Referring to the electrical characteristics on page 6, since it is per channel, at VEN=2V and Iout=0A, the maximum expected current at the supply is then 3.3mA*2=6.6mA, right?
2. Still on page 6, Vs=±2V. The quiescent current is measured at the positive supply right? The same max Iq is expected to be measured at the negative supply?
Thank you,
Elisha
Hi Elisha,
1. Referring to the electrical characteristics on page 6, since it is per channel, at VEN=2V and Iout=0A, the maximum expected current at the supply is then 3.3mA*2=6.6mA, right?
Yes, Iq will be doubled at 6.6mA at 25C (operating Iq or current draw at Enable pin without load), which has the testing condition from Vs = +/-2V to +/-18V with common mode and Vo are configured at midsupply or 0V and No Rload (Iout=0A) . If you want to take into account the entire temperature range, you have to pick 4.2mA/CH data set for the worst case.
2. Still on page 6, Vs=±2V. The quiescent current is measured at the positive supply right? The same max Iq is expected to be measured at the negative supply?
The Op Amp quiescent current is measured as current flow from Op Amp's positive to negative rails. In this case, a typical 2.6-3.3mA/CH is referenced to the current from Vs = +/-2V to +/-18V with the above testing parameters at 25C. If test conditions changed (this is no load condition), the specified Iq value is not longer true. However, 4.2mA/CH is the worst case scenarios for the entire operating temperature range (Iout = 0), see the captured image below.
Ven = 0 and Iout = 0A are shutdown or disabled quiescent current figures at the bottom of the page.
Best,
Raymond
