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800MHz to 1000MHz Variable-Gain Amplifier with Analog Gain Control

High-Performance RF VGA with 44dB of Linearly Controlled Dynamic Range and Constant OIP3 of 39dBm

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Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • 800MHz to 1000MHz RF Frequency Range†
  • 39dBm Constant OIP3 (Over All Gain Settings)
  • 23.5dBm Output 1dB Compression Point
  • 15.5dB Typical Gain at Maximum Gain Setting
  • 0.15dB Gain Flatness Over 100MHz Bandwidth
  • 4.5dB Noise Figure at Maximum Gain Setting (Using 1 Attenuator)
  • Two Gain-Control Ranges: 22dB and 44dB
  • Analog Gain Control
  • Single +5V Supply Voltage
  • Pin Compatible with MAX2057, 1700MHz to 2500MHz RF VGA
  • External Current-Setting Resistors Provide Option for Operating VGA in Reduced-Power/Reduced-Performance Mode
  • Lead-Free Package Available
  • Applications/Uses

    • ±10V from +5V Logic Supply
    • Automated Test Equipment (ATE)
    • Broadband Systems
    • Cellular cdmaOne™, cdma2000®, and Integrated Digital Enhanced Network Base-Station Transmitter
    • Digital and Spread-Spectrum Communication Systems
    • GSM 850/GSM 900 2G and 2.5G EDGE Base-Station Transmitters and Power Amplifiers
    • Microwave Terrestrial Links
    • Receiver Gain Control
    • Transmitter Gain Control
    • WCDMA 850MHz and Other 3G Base-Station Transmitters and Power Amplifiers

    Description

    The MAX2056 general-purpose, high-performance variable-gain amplifier (VGA) is designed to operate in the 800MHz to 1000MHz frequency range†. This device features 15.5dB of gain, 4.5dB of noise figure, and an output 1dB compression point of 23.5dBm. The MAX2056 also provides an exceptionally high OIP3 level of 39dBm, which is maintained over the entire attenuation range. In addition, the on-chip analog attenuators yield infinite control and high attenuation accuracy over selectable 22dB or 44dB control ranges. Each of these features makes the MAX2056 an ideal VGA for cellular band GSM, cdma2000, W-CDMA, and iDEN® transmitter and power amplifier AGC circuits.

    The MAX2056 is pin compatible with the MAX2057 1700MHz to 2500MHz VGA, making this family of amplifiers ideal for applications where a common PC board layout is used for both frequency bands.

    The MAX2056 operates from a single +5V supply and is available in a compact 36-pin thin QFN package (6mm x 6mm x 0.8mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

    Simplified Block Diagram

    MAX2056: Typical Application Circuit MAX2056: Typical Application Circuit Zoom icon

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .