Analog Devices introduced ultrastable precision shunt reference

Analog Devices ADR1399

Analog Devices introduced the ADR1399, precision shunt reference that features excellent temperature stability over a wide range of voltage, temperature, and quiescent current conditions. A temperature stabilizing loop is incorporated with the active Zener on a monolithic substrate, which nearly eliminates changes in voltage with temperature. The subsurface Zener circuit is fully specified at a quiescent current IREF of 3 mA and offers minimal noise (1.44 μV p-p, 0.1 Hz to 10 Hz) and excellent long-term stability (7 ppm/√kHr). The ADR1399 offers much lower output dynamic impedance (0.08 Ω) than the LM399, reducing the effects of shunt resistor (RSHUNT) and the supply voltage variation on the reference output.

Analog Devices - ADR1399

Ideal applications for the ADR1399 include ultrastable digital voltmeters, precision calibration equipment, and ultra repeatable analog-to-digital converters (ADCs).

ADR1399 Pin Configuration
ADR1399 Pin Configuration.


  • 7.05 V ultrastable shunt reference
  • Low temperature coefficient: 0.2 ppm/°C
  • Maximum dynamic impedance: 0.08 Ω
  • Typical reference noise for 10 Hz < f < 1 kHz: 1.84 μV rms
  • Initial accuracy range: –300 mV to +250 mV
  • Available in 4-lead TO-46 metal can
  • External thermal insulator provided
  • Upgrade path for legacy LM399


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

Pricing and Availability

The ADR1399 is already supplied to customers in 4-lead TO-46 metal can/ The unit price in 1,000 pieces quantities is $10.27. The EVAL-ADR1399 evaluation kit is also available.

Evaluation Board ADR1399H-EBZ for the ADR1399 Ultra Stable Shunt Voltage Reference
Evaluation Board ADR1399H-EBZ for the ADR1399 Ultra Stable Shunt Voltage Reference.

1-4 Layer PCBs $2

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