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I had question about whether there is a small clerical error on the quiescent current. At Vs equal to the typical 30V, shouldn't the quiescent current also be 20mA for this typical calculation or was the point of the calculation to calculate the worst case scenario?
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Our goal is to calculate the worst-case power dissipation for our given operating conditions. As it turns out, the the maximum quiescent current draw does not necessarily occur with the maximum power supply voltage, so the maximum Iq of 25mA always applies whether we are using the minimum or maximum power supply voltage. That being the case, the calculations are correct.
Ian WilliamsApplications Engineer - Precision Amplifiers
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