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ADR391:  2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown

Product Details

Newer Alternatives: NEW DESIGNS with input voltages up to 5.5V max, consider the ADR3425 or ADR3525.

The ADR391/ADR392/ADR395 are precision 2.5 V, 4.096 V, and 5 V band gap voltage references, respectively, featuring low power and high precision in a tiny footprint. Using patented temperature drift curvature correction techniques from Analog Devices, Inc., the ADR39x references achieve a low 9 ppm/°C of temperature drift in the TSOT package.

The ADR39x family of micropower, low dropout voltage references provides a stable output voltage from a minimum supply of 300 mV above the output. Their advanced design eliminates the need for external capacitors, which further reduces board space and system cost. The combination of low power operation, small size, and ease of use makes the ADR39x precision voltage references ideally suited for battery-operated applications.


  • Battery-powered instrumentation
  • Portable medical instrumentation
  • Data acquisition systems
  • Industrial process controls
  • Automotive


  • Compact 5-Lead TSOT Package
  • Low Temperature Coefficient:
    B-Grade: 9 ppm/°C
    A-Grade: 25 ppm/°C
  • Initial accuracy:
    B grade: ±4 mV maximum (ADR391)
    A grade: ±6 mV maximum
  • Ultralow output noise: 5 μV p-p (0.1 Hz to 10 Hz)
  • Low Dropout Performance:
    300 mV
  • Low supply current:
    3 µA Maximum in Shutdown
    140 µA Maximum in Operation
  • No external capacitor required
  • Output Current Capability: 5 mA
  • Automotive grade available
  • Wide Temperature Range:
    -40°C to +125°C

Pin Configuration Diagram for ADR391


Title Content Type File Type
ADR391/ADR392/ADR395: Micropower, Low Noise Precision Voltage References with Shutdown Data Sheet (Rev H, 10/2009) (pdf, 425 kB) Data Sheets PDF
AN-713: The Effect of Long-Term Drift on Voltage References  (pdf, 237 kB) Application Notes PDF
CN-0194: Galvanically Isolated, 2-Channel, 16-Bit, Simultaneous Sampling, Daisy-Chained Data Acquisition System  (pdf, 464 kB) Circuit Note PDF
ICs for Programmable Logic Control and Distributed Control Systems  (pdf, 976 kB)
Analog Devices leadership in industrial IC technology, with the development of the iCMOS™ and iPolar™ processes, has uniquely defined high voltage and low voltage integration to deliver smaller, higher performance, and more cost effective ICs for industrial systems.
Overview PDF
RAQs index Rarely Asked Questions HTML
What do I need to know about selecting and using Voltage References? FAQs/RAQs HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Voltage Reference Selection & Evaluation Wizard Design Calculators HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

ADR391 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADR391AUJZ-R2 Status: Production 5 ld TSOT 5 Ind Reel, 250 $1.16 $1.16 Y  Material Info Notify Me Purchase
ADR391AUJZ-REEL7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $0.88 Y  Material Info PCN Purchase Sample
ADR391BUJZ-R2 Status: Production 5 ld TSOT 5 Ind Reel, 250 $2.16 $2.16 Y  Material Info Notify Me Purchase
ADR391BUJZ-REEL7 Status: Production 5 ld TSOT 5 Ind Reel, 3000 - $1.35 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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