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ADR445:  Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source

Product Status:   Production 

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 More

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.

Applications

  • 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

    Less

    ADR445:  Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source

    Product Description

    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.

    Applications

  • 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
      • Input range: (VOUT + 500 mV) to 18 V
      • Superb temperature coefficient
        A Grade: 10 ppm/°C
        B Grade: 3 ppm/°C
      • Low dropout operation: 500 mV
      • High output source and sink current
        +10 mA and −5 mA, respectively
      • Wide temperature range: −40°C to +125°C

    Pin Configuration Diagram for ADR445

    View Full Circuit Note Enlarge
    Circuit Benefits and Features:
    • +/- 10V Industrial Level Voltage Output
    • High Precision 18-Bit Accurate
    • On-Chip Reference Buffers
    Products Used in This Circuit
    • AD5780: System Ready, 18-Bit ±1 LSB INL, Voltage Output DAC
    • AD8675: 36 V Precision, 2.8 nV/√Hz Rail-to-Rail Output Op Amp
    • AD8676: Ultra Precision, 36 V, 2.8 nV/√Hz Dual RRIO Op Amp
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    More
    Circuit Design Assistance:
    • Design & Integration Files
    • Evaluation Hardware
    View Full Circuit Note Enlarge
    Circuit Benefits and Features:
    • Industrial output DAC
    • Isolated power and signals
    • Compatible with +/- 10V and 4-20 mA control systems
    Products Used in This Circuit
    • AD5422: Single Channel, 16-Bit, Serial Input, Current Source & Voltage Output DAC
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    • ADUM3471: PWM Controller and Transformer Driver with Quad-Channel Isolators
    Circuit Design Assistance:
    • Design & Integration Files
    View Full Circuit Note Enlarge
    Circuit Benefits and Features:
    • Voltage and Current Output
    • 16-Bit Digitally Isolated Industrial Control Output Module
    • Error < 0.015% of FSR Over all Codes
    Products Used in This Circuit
    • AD5422: Single Channel, 16-Bit, Serial Input, Current Source & Voltage Output DAC
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    • ADUM1401: Quad-Channel Digital Isolator (3/1 Channel Directionality)
    View Full Circuit Note Enlarge
    Products Used in This Circuit
    • AD5781: True 18-Bit, Voltage Output DAC ±0.5 LSB INL, ±0.5 LSB DNL
    • AD8676: Ultra Precision, 36 V, 2.8 nV/√Hz Dual RRIO Op Amp
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    Circuit Design Assistance:
    • Device Drivers
    View Full Circuit Note Enlarge
    Products Used in This Circuit
    • AD5547: Dual Current Output, Parallel Input, 16-Bit Multiplying DACs with 4-Quadrant Resistors
    • AD5557: Dual Current Output, Parallel Input, 14-Bit Multiplying DACs with 4-Quadrant Resistors
    • AD8512: Low Noise, Low Input Bias Current, Wide Bandwidth Precision JFET Dual Op Amp
    • AD8605: Precision, Low Noise, CMOS, RRIO Op Amp (single)
    • ADR01: Ultracompact, Precision 10.0 V Voltage Reference
    • ADR441: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    More
    View Full Circuit Note Enlarge
    Products Used in This Circuit
    • AD5547: Dual Current Output, Parallel Input, 16-Bit Multiplying DACs with 4-Quadrant Resistors
    • AD5557: Dual Current Output, Parallel Input, 14-Bit Multiplying DACs with 4-Quadrant Resistors
    • AD8605: Precision, Low Noise, CMOS, RRIO Op Amp (single)
    • AD8628: Zero-Drift, Single-Supply, RRIO Op Amp
    • AD8629: Zero Drift, Single-Supply, R/R, Input/Output Operational Amplifier
    • ADR03: Ultracompact, Precision 2.5 V Voltage Reference
    • ADR441: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    • ADR445: Ultralow Noise, LDO XFET Voltage Reference with Current Sink and Source
    More

    Circuits from the Lab™
    Engineered. Tested. Ready to Integrate.

    Budgetary Price & Packaging   |   Samples   |   Check Inventory & Purchase

    ADR445 Model Options
    Model Package Pins Temp.
    Range    		 Packing,
    Qty    		 Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADR445ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $3.18 $2.95 Y  Material Info PCN Purchase Sample
    ADR445ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $2.95 Y  Material Info PCN Purchase
    ADR445ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.02 $2.78 Y  Material Info PCN Purchase Sample
    ADR445ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.78 Y  Material Info PCN Purchase
    ADR445BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.42 $3.91 Y  Material Info PCN Purchase
    ADR445BRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.91 Y  Material Info PCN Purchase
    ADR445WBRZ-R7 Status: Pre-Release SOIC 150 MIL 8 Auto Reel - - Y  Material Info Notify Me Contact ADI
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    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
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    *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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