LT6657 Ultra-Stable Bandgap Voltage References

Analog Devices' 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 1.5 ppm/°C drift with predictable temperature behavior and an initial voltage accuracy of 0.1%. It also offers 0.5 ppm_P-P noise and very low temperature cycling hysteresis.

The LT6657 is a low dropout reference that can be powered from as little as 50 mV above the output voltage, up to 40 V. The buffered output supports ±10 mA 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: 1.5 ppm/°C max B grade: 3 ppm/°C max Low noise 0.5 ppmP-P (0.1 Hz to 10 Hz) 0.8 ppmRMS (10 Hz to 1 kHz) Wide supply range to 40 V Sources and sinks 10 mA min Available output voltage option: 2.5 V		Line regulation: 0.2 ppm/V Load regulation: 0.7 ppm/mA Reverse supply protection Reverse output protection Low power shutdown: <4 μA max Thermal protection Can operate in shunt mode Configurable as a negative reference MSOP-8 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