NE5532

The NE5532, also sold as SA5532, SE5532 and NG5532 (commonly called just 5532) is a dual monolithic, bipolar, internally compensated operational amplifier (op amp) for audio applications introduced by Signetics in 1979. The 5532 and the contemporary TL072 were the first operational amplifiers that outperformed discrete class A circuits in professional audio applications. Due to low noise and very low distortion, the 5532 became the industry standard for professional audio. According to Douglas Self, "there is probably no music on the planet that has not passed through a hundred or more 5532s on its way to the consumer". The performance of the 5532 remained best in class for almost thirty years, until the introduction of the LM4562 in 2007. As of 2021, the 5532 remains in mass production as a generic product. Unlike many other low-cost op amps, the 5532 exists only in a dual form, available in 8-pin PDIP, SO and SOIC packages. The single 5534, as well as the discontinued uncompensated dual 5533, is not fully compensated and is thus unstable at unity gain; the 5534 has lower noise density than the 5532 but is otherwise similar.