ADR1399KEZ

Overview

The ADR1399KEZ is an oven-compensated, buried zener voltage reference providing a nominal output of 7.05 V in an 8-terminal LCC package. It features a temperature coefficient of 0.2 ppm/°C and low dynamic impedance of 0.011 Ω. The device operates with a quiescent current of 3 mA and includes force and sense pins for Kelvin sensing.

Feature Summary

• Oven-compensated design ensures excellent temperature stability over wide operating ranges.
• Integrated force and sense pins enable precise Kelvin sensing to minimize IR drop errors.
• Low dynamic impedance reduces sensitivity to supply voltage variations and shunt resistor drift.

Applications

• Precision voltage reference for multimeters
• Calibration equipment voltage standards
• Laboratory measurement equipment
• Industrial monitor and control instrumentation
• Ultrastable data converters

Procurement Notes

Verify the specific ordering suffix KEZ corresponds to the 8-terminal LCC package variant rather than the TO-46 configuration. Confirm RoHS compliance status as indicated by the Z suffix in related part numbers. Ensure application circuits account for the higher heater power requirements typical of the LCC package compared to hermetically sealed alternatives.

Selection Notes

Select this component when surface-mount technology compatibility is required alongside high precision. The LCC package offers lower dynamic impedance compared to legacy metal can versions. Designers must implement proper PCB thermal isolation techniques to maintain the internal oven temperature and prevent excessive heat dissipation into the substrate.

Part Context

This part belongs to the ADR1399 family of ultrastable shunt references manufactured by Analog Devices Inc. It serves as a modern surface-mount upgrade path for legacy LM399 designs. The family utilizes a subsurface zener circuit combined with temperature stabilizing loops to achieve superior long-term stability and low noise performance.

Replacement Considerations

ADR1399KHZ