I have a +-24 V supply and I want to power an op amp. I initially tried an LM324 using a single +24V supply, but I then discovered that I want the op amp to be allowed to output negative voltages too (which the 324 can't). I could not find an op amp that can take e.g. max +-25 V so that I can connect it immediately to my supply. Would just a voltage divider do?
Electronic – Power an op amp when having only higher supplies
operational-amplifier
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Best Answer
A LM324 can handle up to 32 V supply, so ±15 V would work and give you most of the voltage swing a LM324 can have. A opamp takes relatively little current, so basic linear regulators will do. You've got plenty of headroom, so the 78xx series will be fine. You can use a 7815 to make +15 V from the +24 V supply, and a 7915 to make -15 V from the -24 V supply.