Analog Devices introduced ultrastable precision shunt reference

Analog Devices introduced ultrastable precision shunt reference


Analog Devices introduced the ADR1399, a 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.


  • 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

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

Pricing and Availability

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

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.

About mixos

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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