1. Products
  2. Amplifiers
  3. Operational Amplifiers (Op Amps)
  4. Low Noise Op Amps (≤ 10nV/√Hz)
  5. LT1128


Overview

Features and Benefits

  • Voltage Noise
    • 1.1nV/√Hz Max. at 1kHz
    • 0.85nV/√Hz Typ. at 1kHz
    • 1.0nV/√Hz Typ. at 10Hz
  • 35nVP-P Typ., 0.1Hz to 10Hz
  • Gain-Bandwidth Product
    • LT1028: 50MHz Min.
    • LT1128: 13MHz Min.
  • Slew Rate
    • LT1028: 11V/µs Min.
    • LT1128: 5V/µs Min.
  • Offset Voltage: 40µV Max.
  • Drift with Temperature: 0.8µV/°C Max.
  • Voltage Gain: 7 Million Min.
  • Voltage and Current Noise 100% Tested
  • Available in 8-Pin SO Package

Product Details

The LT1028 (gain of –1 stable)/LT1128 (gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters (0.1µV/°C drift, 10µV offset voltage, 30 million voltage gain). Although the LT1028/LT1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 25nA.

The LT1028/LT1128’s voltage noise is less than the noise of a 50Ω resistor. Therefore, even in very low source impedance transducer or audio amplifier applications, the LT1028/LT1128’s contribution to total system noise will be negligible.

Applications

  • Low Noise Frequency Synthesizers
  • High Quality Audio
  • Infrared Detectors
  • Accelerometer and Gyro Amplifiers
  • 350Ω Bridge Signal Conditioning
  • Magnetic Search Coil Amplifiers
  • Hydrophone Amplifiers

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

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LTspice

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LT1128

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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LT1128ACN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LT1128CN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LT1128CS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT1128CS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R242 Reliability Data

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Sample & Buy


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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.