ADA4939-2
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ADA4939-2

Ultralow Distortion Differential ADC Driver

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $6.70
Features
  • Extremely low harmonic distortion
    • −102 dBc HD2 at 10 MHz
    • −83 dBc HD2 at 70 MHz
    • −77 dBc HD2 at 100 MHz
    • −101 dBc HD3 at 10 MHz
    • −97 dBc HD3 at 70 MHz
    • −91 dBc HD3 at 100 MHz
  • Low input voltage noise: 2.3 nV/√Hz
  • High speed
    • −3 dB bandwidth of 1.4 GHz, G = 2
    • Slew rate: 6800 V/μs, 25% to 75%
    • Fast overdrive recovery of <1 ns
  • ±0.5 mV typical offset voltage
  • Externally adjustable gain
  • Stable for differential gains ≥2
  • Differential-to-differential or single-ended-to-differential operation
  • Adjustable output common-mode voltage
  • Single-supply operation: 3.3 V to 5 V
Additional Details
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The ADA4939-1 / ADA4939-2 are low noise, ultralow distortion, high speed differential amplifiers. They are an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 100 MHz. The output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4939-1 / ADA4939-2 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.

With the ADA4939-1 / ADA4939-2, 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 ADA4939-1 / ADA4939-2 are fabricated using Analog Devices, Inc., proprietary silicon-germanium (SiGe), complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 2.3 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4939-1 / ADA4939-2 make them well suited for a wide variety of data acquisition and signal processing applications.

The ADA4939-1 (single) is available in a 3 mm × 3 mm, 16-lead LFCSP, and the ADA4939-2 (dual) is available in a 4 mm × 4 mm, 24-lead LFCSP. The pinouts are optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4939-1/ADA4939-2 are specified to operate over the −40°C to +105°C temperature range; both operate on supplies between 3.3 V and 5 V.

Applications

  • ADC drivers
  • Single-ended-to-differential converters
  • IF and baseband gain blocks
  • Differential buffers
  • Line drivers
Part Models 2
1ku List Price Starting From $6.70

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADA4939-2YCPZ-R7
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ADA4939-2YCPZ-RL
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Product Lifecycle

PCN

May 5, 2014

- 14_0020

Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

May 5, 2014

- 14_0020

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Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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EVAL-FDA-2

Evaluation Board for Dual High Speed Differential Amplifiers

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EVAL-FDA-2

Evaluation Board for Dual High Speed Differential Amplifiers

Evaluation Board for Dual High Speed Differential Amplifiers

Features and Benefits

  • Enables quick breadboarding/prototyping
  • User-defined circuit configuration
  • Edge-mounted SMA connector provisions
  • Easy connection to test equipment and other circuits
  • Two independent circuits enhance flexibility

Product Detail

The EVAL-FDA-2CPZ-24 is designed to aid in the evaluation of dual high speed differential amplifiers. The EVAL-FDA-2CPZ-24 is a bare board (that is, there are no components soldered to the board) that enables users to quickly prototype a variety of differential amplifier circuits, which minimizes risk and reduces time to market. The EVAL-FDA-2CPZ-24 evaluation board supports any of the Analog Devices, Inc., dual high speed differential amplifiers in 4 mm × 4 mm, lead frame chip scale packages (LFCSP).
Tools & Simulations

Tools & Simulations 2

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