Features and Benefits

  • Low Noise:
    • 0.25ppmP-P (0.1Hz to 10Hz) 625nVP-P for the LTC6655-2.5
    • 0.21ppmRMS (10Hz to 1kHz) for the LTC6655LN CNR = 100µF
  • Low Drift: 2ppm/°C Max
  • High Accuracy: ±0.025% Max
  • No Humidity Sensitivity (LS8 Package)
  • Thermal Hysteresis (LS8): 30ppm (–40°C to 85°C)
  • Long-Term Drift (LS8): 20ppm/√kHr
  • 100% Tested at –40°C, 25°C and 125°C
  • Load Regulation: <10ppm/mA
  • Sinks and Sources Current: ±5mA
  • Low Dropout: 500mV
  • Maximum Supply Voltage: 13.2V
  • Low Power Shutdown: <20µA Max
  • Available Output Voltages: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V
  • Available in an 8-Lead MSOP and High Stability Hermetic 5mm × 5mm LS8 Packages

Product Details

The LTC6655 is a complete family of precision bandgap voltage references, offering exceptional noise and drift performance. This low noise and drift is ideally suited for the high resolution measurements required by instrumentation and test equipment. In addition, the LTC6655 is fully specified over the temperature range of –40°C to 125°C, ensuring its suitability for demanding automotive and industrial applications. Advanced curvature compensation allows this bandgap reference to achieve a drift of less than 2ppm/°C with a predictable temperature characteristic and an output voltage accurate to ±0.025%, reducing or eliminating the need for calibration.

The LTC6655LN Low Noise comes with a noise reduction pin that enables reduction of wideband noise with the addition of a single capacitor.

The LTC6655 can be powered from as little as 500mV above the output voltage to as much as 13.2V. Superior load regulation with source and sink capability, coupled with exceptional line rejection, ensures consistent performance over a wide range of operating conditions. A shutdown mode is provided for low power applications.

The LTC6655 references are offered in an 8-lead MSOP package and an 8-lead LS8 package. The LS8 is a 5mm × 5mm surface mount hermetic package that provides outstanding stability.


  • Instrumentation and Test Equipment
  • High Resolution Data Acquisition Systems
  • Weigh Scales
  • Precision Battery Monitors
  • Precision Regulators
  • Medical Equipment

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 (35)

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.

To launch ready-to-run LTspice demonstration circuits for this part:

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Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.


Models for the following parts are available in LTspice:


Reference Designs (2)

Product Recommendations

LTC6655 Companion Parts

Recommended Related Parts

Recommended ADCs

Reference Materials

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

Support & Discussions

LTC6655 Discussions

RE: LTZ1000A stack-up
8 week(s) ago in Voltage References
RE: LTC6655 noise spectrum density
9 week(s) ago in Voltage References

Sample & Buy

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Evaluation Boards

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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.