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

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.

Features 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 Typical Application

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