ADA4937-1:  Ultralow Distortion Differential ADC Driver (Single)

The ADA4937 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 ...More

ADA4937-1:  Ultralow Distortion Differential ADC Driver (Single)

Product Description

The ADA4937 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 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, 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 ADA4937 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 2.2 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4937 make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4937 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 ADA4937-1 is specified to operate over the −40°C to +105°C temperature range, and the ADA4937-2 operates over −40°C to +85°C; both operate at 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

    • 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
    Circuits from the Lab

    Find more at our Circuits Library.

    Products Used in This Circuit:
    AD9233, AD9246, AD9254, ADA4937-1

    Circuit Types:  ADC Circuit/Driver
    Applications:  Communications
    Optimized For:  High Speed

    Diagrams

    ADA4937-1 Diagram
    Functional Block Diagram for ADA4937-1

    Specifications

    -3 dB BW (MHz) 1900MHz
    Minimum Gain (Acl) 1
    Supply Current 39.5mA
    Slew Rate (V/us) 6000V/µs
    Distortion (2nd) (dBc) -70dBc
    Distortion (3rd) (dBc) -84dBc
    Package 16-Lead LFCSP

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    ADA4950-2 - Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3

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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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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
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    • 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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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