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


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.

MAX2056: Typical Application Circuit MAX2056: Typical Application Circuit Enlarge+

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
    Part Number Gain Cntl. Channels RF Freq.
    RF Freq.
    Analog Attenuation Range Gain
    Noise Figure
    (mm x mm)
    Package/Pins Oper. Temp.
    min max max
    MAX2056  Analog 1 800 1000 44 15.5 4.5 39 54 -55 -68 4.75 to 5.25 136 6.0 x 6.0
    -40 to +85
    See All RF and IF Variable Gain Amplifiers (17)
    Pricing Notes:
    This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    MAX2056EVKIT: Evaluation Kit for the MAX2056

    Technical Documents

    Tutorial 5429 The IP3 Specification - Demystified
    Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs

    Quality and Environmental Data

    Product Reliability Reports: MAX2056.pdf 
    Lead-Free Package Tin (Sn) Whisker Reports

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