Ultra-Low Noise, Low Distortion, Audio Op Amp

The LT1115 is the lowest noise audio operational amplifier available. This ultralow noise performance (0.9nV/√Hz at 1kHz) is combined with high slew rates (>15V/µs) and very low distortion specifications.

The RIAA circuit shown below using the LT1115 has very low distortion and little deviation from ideal RIAA response (see graph).

Applications

* High Quality Audio Preamplifiers

* Low Noise Microphone Preamplifiers

* Very Low Noise Instrumentation Amplifiers

* Low Noise Frequency Synthesizers

* Infrared Detector Amplifiers

* Hydrophone Amplifiers

* Low Distortion Oscillators

* Voltage Noise:

* 1.2nV/√Hz Max at 1kHz

* 0.9nV/√Hz Typ at 1kHz

* Voltage and Current Noise 100% Tested

* Gain-Bandwidth Product: 40MHz Min

* Slew Rate: 10V/µs Min

* Voltage Gain: 2 Million Min

* Low THD at 10kHz, AV = –10, RL = 600Ω: 0.002%, VO = 7VRMS

* Low IMD, CCIF Method, AV = +10: 0.002%, RL = 600Ω, VO = 7VRMS