1 Features
• 7.6V ultra-precision reference with minimal number
of external components
• Ultra-low temperature drift: 0.05ppm/°C
• Excellent long term stability: 0.3ppm (1k hour to 5k
hour)
• Integrated heater with temperature stable indicator
• 1/f noise (0.1Hz to 10Hz) : 0.12ppmpk-pk
• Input Voltage range: 10V to 16.5V
• Heater supply range: 10V to 42V
• Hermetically sealed ceramic package (20 pin
LCCC)

2 Applications
• Parametric measurement unit
• Lab and field instrumentation
• Precision weight scales
• Battery test equipment
• Digital multimeter
• Source measurement unit
• Data acquisition

3 Description
The REF80 is a highly integrated ultra-low drift
buried zener precision voltage reference. The REF80
combines a precision 7.6V reference with an internal
heater to achieve extremely low temperature drift
of 0.05ppm/°C. The integrated heater maintains the
internal temperature of the die at a constant set
point. This helps the reference voltage stay constant
irrespective of ambient temperature variations. The
device internal temperature is pre-programmed to
eliminate design complexities. This allows for fast
design cycles, easy bring up and no dependence on
high-cost external precision components.
The REF80 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 0ppm (after setteling), critical
for applications that demand a long time period
without calibration. The package also offers excellent
immunity against humidity variation.