Ultra Low-Noise Flat-Gain LNA

    Key Features

    • 0.6 – 6.0 GHz Operational bandwidth
    • Ultra-Low Noise Figure, 0.9 dB at 5.5 GHz
    • Bias Adjustable for Linearity Optimization
    • 35 dBm OIP3 at 65 mA IDD
    • Integrated shut-down control pin
    • Shut-down mode pin with 1.8 V TTL logic compatible
    • Unconditionally stable
    • Maintains OFF state isolation with high Pin drive
    • +3 to +5 V supply; does not require -Vgg

    The QPL9503 is a flat-gain, high-linearity, ultra-low noise amplifier in a small 2 x 2 mm surface-mount package. The LNA provides a gain flatness of 2 dB (peak-to-peak) over a wide bandwidth from 3 to 6 GHz. At 5.5 GHz, the amplifier typically provides 21.6 dB gain, +35 dBm OIP3 at a 65 mA bias setting, and 0.9 dB noise figure. The LNA can be biased from a single positive supply ranging from 3.3 to 5 volts. The device is housed in a green/RoHS-compliant industry-standard 2x2 mm package.

    The QPL9503 is internally matched using a high performance E-pHEMT process and only requires five external components for operation from a single positive supply: an external RF choke and blocking/bypass capacitors and a bias resistor going to pin 1. This LNA integrates a shut-down biasing capability to allow for operation in TDD applications.

    The QPL9503 is optimized for linear performance across the 3 to 6 GHz frequency band but can operate down to 600 MHz.

    Typical Applications

      • Base Station Receivers
      • Tower Mount Amplifiers
      • Repeaters
      • General Purpose Wireless
    Frequency Min(GHz) 0.6
    Frequency Max(GHz) 6
    Gain(dB) 21.6
    NF(dB) 0.9
    OP1dB(dBm) 19
    OIP3(dBm) 35
    Voltage(V) 5
    Current(mA) 65
    Package(mm) 2.0 x 2.0
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No

    X-Microwave Design System

    This product is available as an X-Microwave Block (X-MWblock) for evaluation.

    X-MWblocks are RF and microwave "drop-in" components that can be used individually for prototyping or in production assemblies. X-MWblocks are easy to test, integrate, align, and configure to 60 GHz and beyond. No messy sweat soldering or silver epoxy processes are required. X-MWblocks are highly characterized with S-parameter models and connect with a patented solder-less interconnect technology.

    Order the X-Microwave Block for this product

    This product appears in the following application block diagrams:

    • Applications > Network Infrastructure > Wireless Infrastructure > Macro Base Station

      Macro Base Station

    • Applications > Network Infrastructure > Wireless Infrastructure > Repeaters / Boosters / DAS

      Repeaters / Boosters / DAS

    • Applications > Network Infrastructure > Wireless Infrastructure > Small Cells FDD

      Small Cells FDD

    • Applications > Network Infrastructure > Wireless Infrastructure > Small Cells TDD

      Small Cells TDD

    • Applications > Network Infrastructure > Wireless Infrastructure > 5G > 5G Sub-6 GHz Massive MIMO

      5G Sub-6 GHz Massive MIMO