Audio Applications for Op Amps, Part I

Split Supplies Vs. Single Supply All op amps have two power pins. In most cases, they are labeled VCC + and VCC-. Sometimes, however, they are labeled VCC and GND. This is an attempt on the part of the data sheet author to categorize the part as a split-supplies or single-supply part. It does not mean, however, that the op amp has to be operated that way. It may or may not be able to operate from different voltage rails. Consult the data sheet; especially the absolute maximum ratings and voltage-swing specifications, before operating at anything other than the recommended power supply voltage(s).