ADA4940-2
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ADA4940-2

Ultralow Power, Low Distortion ADC Driver

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 3
1ku List Price Starting From $3.05
Features
  • Small signal bandwidth: 260 MHz
  • Ultralow power 1.25mA
  • Extremely low harmonic distortion
    • −122 dB THD at 50 kHz
    • −96 dB THD at 1 MHz
  • Low input voltage noise: 3.9 nV/√Hz
  • 0.35 mV maximum offset voltage
  • Balanced outputs
  • Settling time to 0.1%: 34 ns
  • Rail-to-rail output: −VS + 0.1 V to +VS − 0.1 V
  • Adjustable output common-mode voltage
  • Flexible power supplies: 3 V to 7 V (LFCSP)
  • Disable pin to reduce power consumption
Additional Details
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The ADA4940-1 / ADA4940-2 are low noise, low distortion differential amplifiers with very low power consumption. They are an ideal choice for driving low power, high resolution, high performance SAR and sigma-delta (Σ-Δ) analog-to-digital converters (ADCs) with resolutions up to 18 bits from dc to 1 MHz on only 1.25 mA of quiescent current. The adjustable level of the output common-mode voltage allows the ADA4940-1 /  ADA4940-2 to match the input common-mode voltage of multiple ADCs. The internal common-mode feedback loop provides exceptional output balance, as well as suppression of even-order harmonic distortion products.

With the ADA4940-1 / ADA4940-2, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier. The ADA4940-1 / ADA4940-2 are fabricated using Analog Devices, Inc., complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 3.9 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4940-1 / ADA4940-2 make them well suited for a variety of data acquisition and signal processing applications.

The ADA4940-1 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4940-2 is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinout is optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4940-1 / ADA4940-2 are specified to operate over the −40°C to +125°C temperature range.

Applications

  • Low power ADC drivers
  • Single-ended-to-differential converters
  • Differential buffers
  • Line drivers
  • Medical Imaging
  • Industrial Process Control
  • Portable Electronics
Part Models 3
1ku List Price Starting From $3.05

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADA4940-2ACPZ-R2
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ADA4940-2ACPZ-R7
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ADA4940-2ACPZ-RL
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Part Models

Product Lifecycle

PCN

May 22, 2012

- 12_0063

Conversion of Select Sizes of LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE-Korea.

Filter by Model

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Part Models

Product Lifecycle

PCN

May 22, 2012

- 12_0063

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Conversion of Select Sizes of LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE-Korea.

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 5

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.

Reference Designs

Reference Designs 1

Simplified Receiver Subsystem for Magnitude and Phase Measurements

RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz

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CN0374

RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz

CN0374

Circuits from the lab

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RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz

Features and Benefits

  • Precise Magnitude and Phase Measurements to 6GHz
  • Small PCB Footprint
View Detailed Reference Design external link

Design & Integration Tools

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