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ADR381:  2.048 V and 2.5 V Bandgap Voltage References

Product Details

The ADR380 and ADR381 are precision 2.048 V and 2.500 V band gap voltage references featuring high accuracy, high stability, and low power consumption in a tiny footprint. Patented temperature drift curvature correction techniques minimize nonlinearity of the voltage change with temperature. The wide operating range and low power consumption make them ideal for 3 V to 5 V battery-powered applications.

The ADR380 and ADR381 are micropower, low dropout voltage (LDV) devices that provide a stable output voltage from supplies as low as 300 mV above the output voltage. They are specified over the industrial (−40°C to +85°C) temperature range. The ADR380/ADR381 are available in the tiny 3-lead SOT-23 package.


  • Initial accuracy: ±5 mV/±6 mV maximum
  • Initial accuracy error: ±0.24%/±0.24%
  • Low TCVOUT: 25 ppm/°C maximum
  • Load regulation: 70 ppm/mA
  • Line regulation: 25 ppm/V
  • Wide operating ranges
    2.4 V to 18 V for ADR380
    2.8 V to 18 V for ADR381
  • Low power: 120 μA maximum
  • High output current: 5 mA
  • Wide temperature range: −40°C to +85°C
  • Tiny 3-lead SOT-23 package with standard pinout

ADR381 Pin Diagram

Of Note ...

For additional information on our family of Precision Voltage References, please contact the Voltage Reference Design Group and include your name, company, mailing address, telephone/fax numbers, and email address as well as a brief description of your application.


Title Content Type File Type
ADR380/ADR381: Precision Low Drift 2.048 V/2.500 V SOT-23 Voltage Reference Data Sheet (Rev C, 10/2010) (pdf, 316 kB) Data Sheets PDF
AN-713: The Effect of Long-Term Drift on Voltage References  (pdf, 237 kB) Application Notes PDF
CN-0218: 500 V Common-Mode Voltage Current Monitor  (pdf, 161 kB) Circuit Note PDF
CN-0188: Isolated Low Side Current Monitor for Negative High Voltage Rails  (pdf, 129 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
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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

ADR381 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADR381ARTZ-R2 Status: Production 3 ld SOT-23 3 Ind Reel, 250 $1.21 $1.21 Y  Material Info Notify Me Purchase
ADR381ARTZ-REEL7 Status: Production 3 ld SOT-23 3 Ind Reel, 3000 - $0.78 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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