Features and Benefits

  • High speed
    • −3 dB bandwidth (G = 1, RL = 100 Ω): 1050 MHz
    • Slew rate: 870 V/μs
    • 0.1% settling time: 9 ns
  • Input bias current: 2 pA typical
  • Input capacitance
    • Common-mode capacitance: 1.3 pF typical
    • Differential mode capacitance: 0.1 pF typical
  • Low input noise
    • Voltage noise: 4 nV/√Hz at 100 kHz
    • Current noise: 2.5 fA/√Hz at 100 kHz
  • Low distortion: −90 dBc at 10 MHz (G = 1, RL = 1 kΩ)
  • Linear output current: 40 mA
  • Supply quiescent current per amplifier: 19 mA typical
  • Powered down supply quiescent current per amplifier: 1.5 mA typical

Product Details

The ADA4817-1 (single) and ADA4817-2 (dual) FastFET amplifiers are unity-gain stable, ultrahigh speed, voltage feedback amplifiers with FET inputs. These amplifiers were developed with the Analog Devices, Inc., proprietary eXtra fast complementary bipolar (XFCB) process, which allows the amplifiers to achieve ultralow noise (4 nV/√Hz; 2.5 fA/√Hz) as well as very high input impedances.

With 1.3 pF of input capacitance, low noise (4 nV/√Hz), low offset voltage (2 mV maximum), and 1050 MHz −3 dB bandwidth, the ADA4817-1/ADA4817-2 are ideal for data acquisition front ends as well as wideband transimpedance applications, such as photodiode preamps.

With a wide supply voltage range from 5 V to 10 V and the ability to operate on either single or dual supplies, the ADA4817-1/ADA4817-2 are designed to work in a variety of applications including active filtering and analog-to-digital converter (ADC) driving. The ADA4817-1 is available in a 3 mm × 3 mm, 8-lead LFCSP and 8-lead SOIC, and the ADA4817-2 is available in a 4 mm × 4 mm, 16-lead LFCSP. These packages feature a low distortion pinout that improves second harmonic distortion and simplifies circuit board layout. They also feature an exposed pad that provides a low thermal resistance path to the printed circuit board (PCB). The EPAD enables more efficient heat transfer and increases reliability. These products are rated to work over the extended industrial temperature range (−40°C to +105°C).


  • Photodiode amplifiers
  • Data acquisition front ends
  • Instrumentation
  • Filters
  • ADC drivers
  • Output buffers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Documentation & Resources

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  • Data Sheets (1)
  • Application Notes (3)
  • User Guides (1)
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  • StudentZone Articles (1)
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  • Rarely Asked Questions (5)
  • Tutorials

    Tools & Simulations

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    Analog Filter Wizard

    Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

    Analog Photodiode Wizard

    Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

    VRMS/dBm/dBu/dBV calculators

    A utility to convert between standard units of power measurement and signal strength.

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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.