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ADA4939-1:  Ultralow Distortion Differential ADC Driver

Product Status:   Production 

The ADA4939 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 output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4939 output to match the input of the ADC. The internal feedback loop also provides ...More

ADA4939-1:  Ultralow Distortion Differential ADC Driver

Product Description

The ADA4939 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 output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4939 output to match the input of the ADC. The internal feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

With the ADA4939, differential gain configurations are easily realized with a simple external feedback network of four resistors that determine the closed-loop gain of the amplifier.

The ADA4939 is fabricated using Analog Devices, Inc., proprietary silicon-germanium (SiGe), complementary bipolar process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.3 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4939 make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4939 is available in a Pb-free, 3 mm × 3 mm 16-lead LFCSP (ADA4939-1, single) or a Pb-free, 4 mm × 4 mm 24-lead LFCSP (ADA4939-2, dual). The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4939-1 and the ADA4939-2 are specified to operate over the −40°C to +105°C temperature range; both operate on supplies between 3.3 V and 5 V.

Applications

  • ADC drivers
  • Single-ended-to-differential converters
  • IF and baseband gain blocks
  • Differential buffers
  • Line drivers

    • Data Sheet, Rev. 0, 5/08

      • Extremely low harmonic distortion
        −102 dBc HD2 @ 10 MHz
        −83 dBc HD2 @ 70 MHz
        −77 dBc HD2 @ 100 MHz
        −101 dBc HD3 @ 10 MHz
        −97 dBc HD3 @ 70 MHz
        −91 dBc HD3 @ 100 MHz
      • Low input voltage noise: 2.3 nV/√Hz
      • High speed
        −3 dB bandwidth of 1.4 GHz, G = 2
        Slew rate: 6800 V/μs, 25% to 75%
        Fast overdrive recovery of <1 ns
      • ±0.5 mV typical offset voltage
      • Externally adjustable gain
      • Stable for differential gains ≥2
      • 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 ADA4939-1

    To find similar products by filtering on operating parameters, please use the  Interactive Product Selection Table

    Budgetary Price & Packaging   |   Samples   |   Check Inventory & Purchase

    ADA4939-1 Model Options
    Model Package Pins Temp.
    Range    		 Packing,
    Qty    		 Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4939-1YCPZ-R2 Status: Production 16 Ind Reel, 250 $4.09 $4.09 Y  Material Info - Purchase
    ADA4939-1YCPZ-R7 Status: Production 16 Ind Reel, 1500 - $3.79 Y  Material Info - Purchase Sample
    ADA4939-1YCPZ-RL Status: Production 16 Ind Reel, 5000 - $3.79 Y  Material Info - Purchase
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    Package Description
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    Temperature Range
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    • 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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    View PCN/PDN
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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.

    ADA4939-1 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4939-1YCP-EBZ Status: Production 16-Lead LFCSP Bare Evaluation Board $18.25 Yes -
    ADA4939-1YCPZ-R7 Status: Production 16-Lead LFCSP - Yes -

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    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.

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