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

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

* 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