Features and Benefits

  • 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, A= –10, R= 600Ω: 0.002%, V= 7VRMS
  • Low IMD, CCIF Method, A= +10: 0.002%, R= 600Ω, V= 7VRMS

Product Details

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).


  • 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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.