Features

• Low Drift
  A Grade: 1.5ppm/°C Max
  B Grade: 3ppm/°C Max
• Low Noise:
  0.5ppm_P-P (0.1Hz to 10Hz)
  0.8ppm_RMS (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

Typical Application

Description

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 0.5ppm_P-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.