Electronic Circuit AnalysisSolutionThe total supply voltage

Electronic Circuit Analysis

Solution

The total supply voltage range. This is total voltage between the two supply terminals. For example, ±15V is a total of 30V. The operating voltage range for an op amp might be, for example, 6V to 36V. At the low voltage extreme this could be ±3V or +6V. At maximum, ±18V or +36V or even 6V/+30V. Yes, unbalanced supplies are okay if you heed points 2 and 3 below.
The input common-mode voltage range (C-M range) is generally specified relative to the positive and negative supply voltages, shown graphically in figure 1. In some equation-like form, C-M range of this hypothetical op amp would be described as 2V above the negative rail to 2.5V below the positive rail. Something like this… (V-)+2V to (V+)–2.5V.
The output voltage range (or output swing capability) is. again, commonly specified relative to the rail voltages. In this case, (V-)+1V to (V+)–1.5V