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ADR440:  Ultralow Noise, LDO XFET® 2.048V Voltage Reference w/Current Sink and Source

Product Details

The ADR44x series is a family of XFET® voltage references featuring ultralow noise, high accuracy, and low temperature drift performance. Using Analog Devices, Inc., patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, voltage change vs. temperature nonlinearity in the ADR44x is greatly minimized.

The XFET references offer better noise performance than buried Zener references, and XFET references operate off low supply voltage headroom (0.5 V). This combination of features makes the ADR44x family ideally suited for precision signal conversion applications in high-end data acquisition systems, optical networks, and medical applications.

The ADR44x family has the capability to source up to 10 mA of output current and sink up to −5 mA. It also comes with a trim terminal to adjust the output voltage over a 0.5% range without compromising performance.

Offered in two electrical grades, the ADR44x family is avail-able in 8-lead MSOP and narrow SOIC packages. All versions are specified over the extended industrial temperature range of −40°C to +125°C.


  • Precision data acquisition systems
  • High resolution data converters
  • Battery-powered instrumentation
  • Portable medical instruments
  • Industrial process control systems
  • Precision instruments
  • Optical control circuits
  • Data Sheet, Rev. C, 3/08


    • Ultralow noise (0.1 Hz to 10 Hz)
      ADR440: 1 μV p-p
      ADR441: 1.2 μV p-p
      ADR443: 1.4 μV p-p
      ADR444: 1.8 μV p-p
      ADR445: 2.25 μV p-p
    • Low dropout operation: 500 mV
    • Superb temperature coefficient
      A Grade: 10 ppm/°C
      B Grade: 3 ppm/°C
    • Input range: (VOUT + 500 mV) to 18 V
    • High output source and sink current
      +10 mA and −5 mA, respectively
    • Wide temperature range: −40°C to +125°C

    Pin Configuration Diagram for ADR440


    Title Content Type File Type
    ADR440/ADR441/ADR443/ADR444/ADR445: Ultralow Noise, LDO XFET Voltage References with Current Sink and Source Data Sheet (Rev E, 11/2010) (pdf, 522 kB) Data Sheets PDF
    Low-Power Data Conversion Technology Enhances Portability
    (Electropages, 10/5/2006)
    Product Reviews HTML
    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.

    SampleSample & Buy

    Price, packaging, availability

    ADR440 Model Options
    Model Package Pins Temp.
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    ADR440ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $3.66 $3.39 Y  Material Info PCN Purchase Sample
    ADR440ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $3.39 Y  Material Info PCN Purchase
    ADR440ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.02 $2.78 Y  Material Info PCN Purchase
    ADR440ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.78 Y  Material Info PCN Purchase
    ADR440BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.42 $3.91 Y  Material Info PCN Purchase
    ADR440BRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.91 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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