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ADA4937-2:  Ultralow Distortion Differential ADC Driver (Dual)

Product Details


The ADA4937-x is a low noise, ultralow distortion, high speed differential amplifier. It is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 100 MHz. The adjustable level of the output common mode allows the ADA4937-x to match the input of the ADC. The internal common-mode feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

With the ADA4937-x, differential gain configurations are easily realized with a simple external feedback network of four resis-tors that determine the closed-loop gain of the amplifier.

The ADA4937-x is fabricated using Analog Devices, Inc., proprie-tary silicon-germanium (SiGe), complementary bipolar process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.2 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4937-x make it well-suited for a wide variety of data acquisition and signal processing applications.

The ADA4937-x is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP (ADA4937-1, single) or a Pb-free, 4 mm × 4 mm, 24-lead LFCSP (ADA4937-2, dual). The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4937-x is specified to operate over the automotive (−40°C to +105°C) temperature range and between 3.3 V and 5 V supplies.

Applications

  • ADC drivers
  • Single-ended-to-differential converters
  • IF and baseband gain blocks
  • Differential buffers
  • Line drivers
  • Data Sheet, Rev. A, 11/07

    FEATURES and BENEFITS

    • Extremely low harmonic distortion
      −112 dBc HD2 @ 10 MHz
      −84 dBc HD2 @ 70 MHz
      −77 dBc HD2 @ 100 MHz
      −102 dBc HD3 @ 10 MHz
      −91 dBc HD3 @ 70 MHz
      −84 dBc HD3 @ 100 MHz
    • High speed
      −3 dB bandwidth of 1.9 GHz,
      G = 1
      Slew rate: 6000 V/μs, 25% to 75%
      Fast overdrive recovery of 1 ns
    • Low input voltage noise: 2.2 nV/√Hz
    • 0.5 mV typical offset voltage
    • Externally adjustable gain
    • Differential-to-differential or single-ended-to-differential operation
    • Adjustable output common-mode voltage
    • Single-supply operation: 3.3 V to 5 V

    Functional Block Diagram for ADA4937-2

    Similar Products

    Documentation

    Title Content Type File Type
    ADA4937-1/ADA4937-2: Ultralow Distortion Differential ADC Driver Data Sheet (Rev D, 08/2013) (pdf, 646 kB) Data Sheets PDF
    AN-1026: High Speed Differential ADC Driver Design Considerations  (pdf, 355 kB) Application Notes PDF
    AN-0990: Terminating a Differential Amplifier in Single-Ended Input Applications  (pdf, 181 kB) Application Notes PDF
    AN-0992: Active Filter Evaluation Board for Differential Amplifiers  (pdf, 85 kB) Application Notes PDF
    AN-282: Fundamentals of Sampled Data Systems  (pdf, 2131 kB) Application Notes PDF
    AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
    AN-584: Using the AD813X Differential Amplifier  (pdf, 174 kB)
    The AD813x differs from conventional op amps by the external presence of an additional input and output. The additional input, VOGM, controls the output common mode voltage.
    Application Notes PDF
    AN-589: Ways to Optimize the Performance of a Difference Amplifier  (pdf, 115 kB)
    This Application Note presents several ways to build and optimize the performance of a discrete difference amplifier. It also recommends amplifiers that will make the overall solution cost/performance competitive with monolithic instrument amplifiers.
    Application Notes PDF
    MT-218: Multiple Feedback Band-Pass Design Example  (pdf, 0) Tutorials PDF
    MT-076: Differential Driver Analysis  (pdf, 95 kB) Tutorials PDF
    MT-075: Differential Drivers for High Speed ADCs Overview  (pdf, 183 kB) Tutorials PDF
    UG-018: Evaluation Board for Dual High Speed Differential Amplifiers  (pdf, 314 kB) User Guides PDF
    Designing 1-ppm DAC Accuracy into Instrumentation Applications
    Understand the challenges of achieving this level of converter performance
    (Planet Analog, 3/2010)
    • Part 1
      This article looks at a 1-ppm DAC and associated support circuitry, error sources, and performance measures.
    • Part 2
      This article discusses 1-ppm circuit complexities including noise, temperature drift, thermoelectric voltages, physical stress, long-term stability, circuit construction and layout, and voltage references.
    Technical Articles HTML
    "Rules of the Road" for High-Speed Differential ADC Drivers
    (Analog Dialogue, Vol. 43, No. 5, 2009)
    Analog Dialogue HTML
    RF Source Booklet  (PDF, 4353 kB)
    RF IC Product Overview - Version P (02/2014)
    Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    ADI DiffAmpCalc™
    ADI's new ADI DiffAmpCalc™ is a free, downloadable calculator for designing differential amplifier circuits. The tool is easy to use and features an interactive user interface to quickly get you up and running.
    ADIsim Design/Simulation Tools HTML
    ADA4937 SPICE Macro Model SPICE Models HTML

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    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

    ADA4937-2 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4937-2YCPZ-R2 Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 250 $7.69 $7.69 Y  Material Info PCN Purchase
    ADA4937-2YCPZ-R7 Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 1500 - $5.69 Y  Material Info PCN Purchase Sample
    ADA4937-2YCPZ-RL Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 5000 - $5.69 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.

    ADA4937-2 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4937-2YCP-EBZ Status: Production 24-Lead LFCSP Bare Evaluation Board $18.25 Yes -
    ADA4937-2YCPZ-R7 Status: Production 24-Lead LFCSP - Yes -

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

    Check Inventory & Purchase

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