LT1115

The LT1115 is the lowest noise audio operational amplifier available. This ultra-low noise performance (0.9nV/(Hz)^1/2 is combined with high slew rates and very low distortion specifications. The RIAA circuit shown below using the LT1115 has very low distortion and little deviation from ideal RIAA sponse (see graph). Which can be used in (1)high quality audio preamplifiers; (2)low noise microphone preamplifiers; (3)very low noise instrumentation amplifiers; (4)low noise frequency synthesizers; (5)lnfrared detector amplifiers; (6)hydrophone amplifiers; (7)low distortion oscillators.

The features of LM2675 can be summarized as (1)voltage noise 1.2nV/(Hz)^1/2 Max at 1kHz, 0.9nV/(Hz)^1/2 Typ at 1kHz; (2)voltage and current noise 100% tested; (3)gain-bandwidth product: 40MHz Min; (4)slew rate: 10V/s Min; (5)voltage gain: 2million Min; (6)low THD@10kHz, AV=-10, RL=600, VO=7VRMS: 0.0002%; (7)low IMD, CCIF method, AV=+10, RL=600, VO=7VRMS: 0.0002%.

The absolute maximum ratings of LM2675 are (1)supply voltage: ±22V; (2)differential input current (Note 4): ±25mA; (3)input voltage: equal to supply voltage; (4)output short circuit duration: indefinite; (5)operating temperature range: 0°C to 70°C; (6)storage temperature range: -65°C to 150°C; (7)Lead temperature (soldering, 10 sec.): 300°C.