SLVSJJ3A July   2025  – July 2026 REF81

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Device and Documentation Support
    1. 4.1 Documentation Support
      1. 4.1.1 Related Documentation
    2. 4.2 Receiving Notification of Documentation Updates
    3. 4.3 Support Resources
    4. 4.4 Trademarks
    5. 4.5 Electrostatic Discharge Caution
    6. 4.6 Glossary
  6. 5Revision History
  7. 6Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

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.

Package Information
PART NAMEPACKAGE (1)PACKAGE SIZE (2)
REF81NAJ (LCCC, 20)8.89mm × 8.89mm
(1) For all available packages, see Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
REF81 REF81 Block Diagram (With Typical External Connections) REF81 Block Diagram (With Typical External Connections)