ADA4927-2:  Ultralow Distortion Current Feedback Differential ADC Driver

The ADA4927 is a low noise, ultralow distortion, high speed, current feedback differential amplifier that is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to ...More

ADA4927-2:  Ultralow Distortion Current Feedback Differential ADC Driver

Product Description

The ADA4927 is a low noise, ultralow distortion, high speed, current feedback differential amplifier that is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 100 MHz. The output common-mode level can easily be matched to the required ADC input common-mode levels. The internal common-mode feedback loop provides exceptional output balance and suppression of even-order distortion products.

Differential gain configurations are easily realized using an external feedback network comprising four resistors. The current feedback architecture provides loop gain that is nearly independent of closed-loop gain, achieving wide bandwidth, low distortion, and low noise at higher gains and lower power consumption than comparable voltage feedback amplifiers.

The ADA4927 is fabricated using the Analog Devices, Inc., silicon-germanium complementary bipolar process, enabling very low levels of distortion with an input voltage noise of only 1.3 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4927 make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4927-1 is available in a Pb-free, 3 mm × 3 mm 16-lead LFCSP, and the ADA4927-2 is available in a Pb-free, 4 mm × 4 mm 24-lead LFCSP. The pinouts are optimized to facilitate printed circuit board (PCB) layout and to minimize distortion. They are specified to operate over the −40°C to +105°C temperature range.

APPLICATIONS

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

    • Data Sheet, Rev. 0, 11/2008

    Features

    • Extremely low harmonic distortion
      −105 dBc HD2 @ 10 MHz
      −91 dBc HD2 @ 70 MHz
      −87 dBc HD2 @ 100 MHz
      −103 dBc HD3 @ 10 MHz
      −98 dBc HD3 @ 70 MHz
      −89 dBc HD3 @ 100 MHz
    • Better distortion at higher gains than VF amplifiers
    • Low input voltage noise: 1.4 nV/√Hz
    • High speed
      −3 dB large signal bandwidth of 2.3 GHz
      0.1 dB gain flatness: 150 MHz
      Slew rate: 5000 V/µs, 25% to 75%
      Fast 0.1% settling time: 10 ns
    • Low input offset voltage: 0.3 mV typical
    • Externally adjustable gain
    • Stability and bandwidth controlled by feedback resistor
    • See data sheet for additional Features

    Diagrams

    ADA4927-2 Diagram
    Functional Block Diagram for ADA4927-2

    Specifications

    -3 dB BW (MHz) 2300MHz
    Minimum Gain (Acl) 1
    Supply Current 22.1mA
    Slew Rate (V/us) 5000V/µs
    Distortion (2nd) (dBc) -87dBc
    Distortion (3rd) (dBc) -89dBc
    Package 24-Lead LFCSP

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    Part# -3 dB BW (MHz) Minimum Gain (Acl) Voltage Supply (V) Supply Current Slew Rate (V/us) Distortion (2nd) (dBc) Distortion (3rd) (dBc) Package Price* (1000-4999)
    AD6630 700 - +/- 5 30mA 3700 - - 16-Lead SOIC $4.18
    AD8132 350 1 +/- 5 10.7mA 1200 -97 -100 8-Lead MSOP, 8-Lead SOIC $1.67
    AD8137 110 1 +/- 6 3.6mA 450 -85 -85 8-Lead SOIC $1.10
    AD8138 320 1 +/- 5 20mA 1500 -94 -114 8-Lead CSP, 8-Lead SOIC $3.75
    AD8139 410 1 5 to 12 24.5mA 800 -90 -105 8-Lead CSP, 8-Lead SOIC $3.75
    AD8350 900 - 4 to 11 32mA 2000 -67 -70 8-Lead SOIC/8-Lead uSOIC $2.52
    AD8351 2200 1 3 to 5.5 32mA 13000 -79 -81 10-Lead uSOIC $2.68
    AD8352 2200 - 3 to 5.5 37mA 11000 -81 -82 16-Lead LFCSP $3.53
    ADA4922-1 38 1 +/- 12 9.4mA 730 -116 -109 - $3.63
    ADA4927-1 2300 1 4.5 to 11 22.1mA 5000 -87 -89 16-Lead LFCSP $3.79
    ADA4927-2 2300 1 4.5 to 11 22.1mA 5000 -87 -89 24-Lead LFCSP $6.29
    ADA4937-1 1900 1 3 to 5.25 39.5mA 6000 -70 -84 16-Lead LFCSP $3.79
    ADA4937-2 1900 1 3 to 5.25 42mA 6000 -77 -84 16-Lead LFCSP, 24-Lead LFCSP $5.69
    ADA4938-1 1000 1 4.5 to 11 40mA 4700 -82 -82 16-Lead LFCSP, 24-Lead LFCSP $3.79
    ADA4938-2 1000 1 4.5 to 11 36.5mA 4700 -82 -82 16-Lead LFCSP, 24-Lead LFCSP $5.69
    ADA4939-1 1400 2 3 to 5 37.7mA 6800 -77 -95 16-Lead LFCSP $3.79
    ADA4939-2 1400 2 3 to 5 37.7mA 6800 -77 -91 16-Lead LFCSP $5.69
    ADA4941-1 30 2 - 2.3mA 22 -75 -71 8-Lead LFCSP, 8-Lead SOIC $2.42
    ADA4950-1 750 1 3 to 11 9.5mA 2900 -80 -84 16-Lead LFCSP, 24-Lead LFCSP $2.99
    ADA4950-2 750 1 3 to 11 9.5mA 2900 -80 -84 16-Lead LFCSP, 24-Lead LFCSP $5.29
    ADL5561 2900 6 3.3 40mA 0.0098 -82 -73 16-Lead LFCSP $3.68

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

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    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
    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.

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    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.

    *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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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