LT6657 – 1.5ppm/°C Drift, Low Noise, Buffered Reference


  • 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: 0.7ppm/mA
  • Reverse Supply Protection
  • Reverse Output Protection
  • Low Power Shutdown: <4μA Max
  • Thermal Protection
  • Can Operate in Shunt Mode
  • Configurable as a Negative Reference
  • Available Output Voltage Option: 2.5V
  • MSOP-8 Package
    LT6657 - 1.5ppm Drift, Low Noise, Buffered Reference

Typical Application


The LT®6657 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.


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

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