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 https://elecena.pl/product/5278974/1-5ppm-c-drift-low-noise-buffered-reference 2015-08-28 https://elecena.pl/product/5278974/1-5ppm-c-drift-low-noise-buffered-reference 2017-10-10 https://elecena.pl/product/5278974/1-5ppm-c-drift-low-noise-buffered-reference 2025-01-20