Print   |   Save to myAnalog

ADA4938-2:  Ultralow Distortion Differential ADC Driver (Dual)

Product Status:   Production 

The ADA4938 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 27 MHz, or up to 12 bits from dc to 74 MHz. The output common-mode voltage is adjustable over a wide range, allowing the ADA4938 to match the input of the ADC. The internal common-mode feedback loop also provides More

exceptional output balance as well as suppression of even-order harmonic distortion products.

Full differential and single-ended-to-differential gain configurations are easily realized with the ADA4938. A simple external feedback network of four resistors determines the closed-loop gain of the amplifier.

The ADA4938 is fabricated using the Analog Devices, Inc. proprietary third-generation, high voltage XFCB process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.6 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4938 make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4938-1 (single amplifier) is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4938-2 (dual amplifier) is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinouts have been optimized to facilitate layout and minimize distortion. The parts are specified to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

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

    • Data Sheet, Rev. 0, 11/07

    Less

    ADA4938-2:  Ultralow Distortion Differential ADC Driver (Dual)

    Product Description

    The ADA4938 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 27 MHz, or up to 12 bits from dc to 74 MHz. The output common-mode voltage is adjustable over a wide range, allowing the ADA4938 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.

    Full differential and single-ended-to-differential gain configurations are easily realized with the ADA4938. A simple external feedback network of four resistors determines the closed-loop gain of the amplifier.

    The ADA4938 is fabricated using the Analog Devices, Inc. proprietary third-generation, high voltage XFCB process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.6 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4938 make it well suited for a wide variety of data acquisition and signal processing applications.

    The ADA4938-1 (single amplifier) is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4938-2 (dual amplifier) is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinouts have been optimized to facilitate layout and minimize distortion. The parts are specified to operate over the extended industrial temperature range of −40°C to +85°C.

    Applications

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

    • Data Sheet, Rev. 0, 11/07

      • Extremely low harmonic distortion
        −106 dBc HD2 @ 10 MHz
        −82 dBc HD2 @ 50 MHz
        −109 dBc HD3 @ 10 MHz
        −82 dBc HD3 @ 50 MHz
      • High speed
        −3 dB bandwidth of 1000 MHz, G = +1
        Slew rate: 4700 V/μs
        0.1 dB gain flatness to 150 MHz
        Fast overdrive recovery of 4 ns
      • Low input voltage noise: 2.6 nV/√Hz
      • 1 mV typical offset voltage
      • Externally adjustable gain
      • Differential-to-differential or single-ended-to-differential operation
      • Adjustable output common-mode voltage
      • Wide supply voltage range: +5 V to ±5 V
      • Single or dual amplifier configuration available

    Functional Block Diagram for ADA4938-2

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

    Budgetary Price & Packaging   |   Samples   |   Check Inventory & Purchase

    ADA4938-2 Model Options
    Model Package Pins Temp.
    Range    		 Packing,
    Qty    		 Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4938-2ACPZ-R2 Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 250 $6.69 $6.69 Y  Material Info Notify Me Purchase
    ADA4938-2ACPZ-R7 Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 1500 - $5.69 Y  Material Info Notify Me Purchase Sample
    ADA4938-2ACPZ-RL Status: Production 24 ld LFCSP (4x4mm w/2.10mm EP) 24 Ind Reel, 5000 - $5.69 Y  Material Info Notify Me Purchase
    back to top

    Help

    Model
    The model number is a specific version of a generic that can be purchased or sampled.

    Status
    Status indicates the current lifecycle of the product. This can be one of 4 stages:
    • Pre-Release: The model has not been released to general production, but samples may be available.
    • Production: The model is currently being produced, and generally available for purchase and sampling.
    • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
    • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    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
    Packing, Qty
    Indicates the packing option of the model (Tube, Reel, Tray, etc.) and the standard quantity in that packing option.

    Price
    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.

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    RoHS Compliant
    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

    View PCN/PDN
    This is the list of Product Change Notifications (PCN) and Product Discontinuance Notifications (PDN) published on the web for this model. Click on the link to access PCN/PDN information. Online PCNs are available starting in 2009 and online PDNs are available starting in 2010. To obtain older PCNs or PDNs, contact your ADI Sales Rep. For more information on ADI's PCN/PDN process, please visit our PCN/PDN Information page.

    Check Inventory/Purchase/Sample
    The Purchase button will be displayed if model is available for purchase online at Analog Devices or one of our authorized distributors. Select the purchase button to display inventory availability and online purchase options.
    The Sample button will be displayed if a model is available for web samples. If a model is not available for web samples, look for notes on the product page that indicate how to request samples - or Contact ADI

    *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.

    ADA4938-2 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADA4938-2ACP-EBZ Status: Production 24-Lead LFCSP Bare Evalua - Yes -
    ADA4938-2ACPZ-R7 Status: Production 24-Lead LFCSP - Yes -

    back to top

    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.

    arrow View Sales and Distribution Offices
    Review this Product X
    content here.
    content here.

    Review this Product

    Close