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Why is the maximum output voltage of an op-amp equal to the power source voltage?
I want to get a gain of ~100, but it is limited to about 13.7 V because the source voltage is 15 V. Why is that? Why can't I get more than 13.7 V output?
4 Answers
- 8 years agoFavorite Answer
an op-amp consists of transistors. When you learn about transistor theory you will understand why the output can not exceed the power supply voltage. for now, you just have to take a leap of faith.
- derframLv 78 years ago
There are op amps that are designed to run on higher voltage. In addition, there are some audio power amp IC that use bootstrapping to generate output voltages higher than the supply.
- RickLv 78 years ago
The output voltage is derived from the power supply so that limits the maximum output you can get.
- Anonymous8 years ago
best to look at the opamps manufacturers data sheets and any other documentation they may have on line : most likely it is some sort of diode protection that is dropping the extra 1.3V. You should still be able to get a gain of 100 if you keep your input voltage below 0.1V though.
