Features and Benefits

  • High performance at low power
  • High speed
    -3 dB bandwidth of 750 MHz, G = 1
    0.1 dB flatness to 210 MHz, VOUT, dm = 2 V p-p, RL, dm = 200 Ω
    Slew rate: 2900 V/µs, 25% to 75%
    Fast 0.1% settling time of 9 ns
  • Low power: 9.5 mA per amplifier
  • Low harmonic distortion
    108 dB SFDR @ 10 MHz
    98 dB SFDR @ 20 MHz
  • Low output voltage noise: 9.2 nV/√Hz, G = 1, RTO
  • ±0.2 mV typical input offset voltage
  • Selectable differential gains of 1, 2, and 3
  • Differential-to-differential or single-ended-to-differential operation
  • Adjustable output common-mode voltage
  • Input common-mode range shifted down by one VBE
  • Wide supply range: +3 V to ±5 V
  • Available in 16-lead and 24-lead LFCSP packages

Product Details

The ADA4950-1/ADA4950-2 are gain-selectable versions of the ADA4932-1/ADA4932-2 with on-chip feedback and gain resistors with on-chip feedback and gain resistors. It is an ideal choice for driving high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. The output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4950-x 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.

Differential gain configurations of 1, 2, and 3 are easily realized with internal feedback networks that are connected externally to set the closed-loop gain of the amplifier.

The ADA4950-1/ADA4950-2 are fabricated using the Analog Devices, Inc., proprietary silicon-germanium (SiGe) complementary bipolar process, enabling them to achieve low levels of distortion and noise at low power consumption. The low offset and excellent dynamic performance of the ADA4950-x make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4950-x is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP (ADA4950-1, single) or a Pb-free 4 mm × 4 mm, 24-lead LFCSP (ADA4950-2, dual). The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4950-1/ADA4950-2 are specified to operate over the -40°C to +105°C temperature range; both operate on supplies from +3 V to ±5 V.

  • ADC drivers
  • Single-ended-to-differential converters
  • IF and baseband gain blocks
  • Differential buffers
  • Line drivers
  • Product Lifecycle icon-recommended Recommended for New Designs

    This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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    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.

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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.