Overview

Features and Benefits

  • Low Drift
    • A Grade: 1.5ppm/°C Max
    • B Grade: 3ppm/°C Max
  • Low Noise:
    • 0.5ppmP-P (0.1Hz to 10Hz)
    • 0.8ppmRMS (10Hz to 1kHz)
  • Wide Supply Range to 40V
  • Sources and Sinks 10mA Min
  • Line Regulation: 0.2ppm/V
  • Load Regulation: 2μV/mA
  • Reverse Supply Protection
  • Reverse Output Protection
  • Low Power Shutdown: <4μA Max
  • 1.5V Min Supply for 1.25V Option
  • Thermal Protection
  • Can Operate in Shunt Mode
  • Configurable as a Negative Reference
  • Available Output Voltage Options: 1.25V, 2.5V, 3V, 4.096V, 5V
  • MSOP-8 Package

Product Details

The LT6657 is a precision voltage reference that combines robust operating characteristics with extremely low drift and low noise. With advanced curvature compensation, this bandgap reference achieves 1.5ppm/°C drift with predictable temperature behavior, and an initial voltage accuracy of 0.1%. It also offers 0.5ppmP-P noise and very low temperature cycling hysteresis.

The LT6657 is a low dropout reference that can be powered from as little as 50mV above the output voltage, up to 40V. The buffered output supports ±10mA of output drive with low output impedance and precise load regulation. The high sink current capability allows operation as a negative voltage reference with the same precision as a positive reference. This part is safe under reverse battery conditions, and includes current protection when the output is short-circuited and thermal shutdown for overload conditions. A shutdown is included to allow power reduction while enabling a quick turn-on.

The LT6657 is fully specified over the temperature range of –40°C to 125°C. It is available in the 8-lead MSOP package.

Applications

  • High Temperature Industrial
  • High Resolution Data Acquisition Systems
  • Instrumentation and Process Control
  • Automotive Control and Monitoring
  • Medical Equipment
  • Shunt and Negative Voltage References

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

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.

LTspice

Models for the following parts are available in LTspice:

LT6657-1
LT6657-1.25
LT6657-2
LT6657-2.5
LT6657-3
LT6657-4
LT6657-4.096
LT6657-5

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.

Sample & Buy

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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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