Features and Benefits

  • Voltage Noise
    • 1.6nV/√Hz Max. at 1kHz
    • 0.9nV/√Hz Typ. at 1kHz
    • 4.7nV/√Hz Typ. at 10Hz
  • Gain-Bandwidth Product
    • RH1028: 50MHz Min.
    • RH1128: 11MHz Min.
  • Slew Rate
    • RH1028: 11V/µs Min.
    • RH1128: 4.5V/µs Min.
  • Offset Voltage: 80µV Max.
  • Drift with Temperature: 1.0µV/°C Max.
  • Voltage Gain: 5 Million Min.

Radiation Performance

  • Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883: 200kRad (Si), per condition A at 50Rads (Si)/sec

Product Details

The RH1028(gain of –1 stable)/RH1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.9nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for RH1028, 20MHz for RH1128), distortion-free output, and true precision parameters (0.25μV/°C drift, 20μV offset voltage, 25 million voltage gain). Although the RH1028/RH1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 50nA.

The RH1028/RH1128’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 RH1028/RH1128’s contribution to total system noise will be negligible.


  • Low Noise Frequency Synthesizers
  • Infrared Detectors
  • Accelerometer and Gyro Amplifiers
  • 350Ω Bridge Signal Conditioning

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.

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.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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