Texas InstrumentsUnited States

The REF81 device utilizes precision buried zener core with integrated heater to generate stable 7.6V. The device further integrates precision resistor dividers and a buffer to offer industry standard voltage references to drive precision data converters. Integrated temperature control with an internal heater enables the reference voltage to stay constant irrespective of ambient temperature variations and achieve extremely low temperature drift of 0.05ppm/°C. The integration of control loop, precision resistances, and buffer enables ease of design and eliminates need of external precision components. The REF81 family is available in a 20-pin LCCC package. The LCCC package is a hermetically sealed ceramic package that enables ultra low long-term stability specification of 1ppm, which is critical for applications that demand a longer operational window without calibration. The package also offers excellent immunity against humidity variation.