ADA4938-2
Info : RECOMMENDED FOR NEW DESIGNS
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ADA4938-2

Ultralow Distortion Differential ADC Driver (Dual)

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 2
1ku List Price Starting From $6.70
Features
  • Extremely low harmonic distortion (HD)
    • −106 dBc HD2 at 10 MHz
    • −82 dBc HD2 at 50 MHz
    • −109 dBc HD3 at 10 MHz
    • −82 dBc HD3 at 50 MHz
  • Low input voltage noise: 2.6 nV/√Hz
  • High speed
    • −3 dB bandwidth of 1000 MHz, G = +1
    • Slew rate: 4700 V/μs
    • 0.1 dB gain flatness to 150 MHz
    • Fast overdrive recovery of 4 ns
  • 1 mV typical offset voltage
  • Externally adjustable gain
  • Differential-to-differential or single-ended-to-differential operation
  • Adjustable output common-mode voltage
  • Wide supply voltage range: +5 V to ±5 V
  • Single or dual amplifier configuration available
Additional Details
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The ADA4938-1 / ADA4938-2 are low noise, ultralow distortion, high speed differential amplifiers. It is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 27 MHz, or up to 12 bits from dc to 74 MHz. The output common-mode voltage is adjustable over a wide range, allowing the ADA4938-1/ADA4938-2 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.

Full differential and single-ended-to-differential gain configurations are easily realized with the ADA4938-1/ADA4938-2. A simple external feedback network of four resistors determines the closed-loop gain of the amplifier.

The ADA4938-1 / ADA4938-2 are fabricated using the Analog Devices, Inc., proprietary third generation, high voltage XFCB process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.6 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4938-1/ADA4938-2 makes them well-suited for a wide variety of data acquisition and signal processing applications.

The ADA4938-1 (single amplifier) is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4938-2 (dual amplifier) is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinouts have been optimized to facilitate layout and minimize distortion. The devices are specified to operate over the extended industrial temperature range of −40°C to +85°C.

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
ADA4938-2ACPZ-R7
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ADA4938-2ACPZ-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

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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 3

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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