Features and Benefits

  • 3.4GHz to 3.8GHz Frequency Range
  • LNA Performance (High/Low-Gain Modes)
    • Gain: +14.4dB/-9.7dB
    • NF: 2.3dB/15.5dB
    • Input IP3: +4dBm/+13dBm
    • Supply Current: 9.2mA/2.7mA
  • Highly Versatile Application
    • Receive Path 1st and 2nd Stage LNA
    • Transmit PA Predriver
    • LO Buffer
  • Adjustable IP3 and Supply Current
  • 0.1µA Supply Current in Shutdown Mode
  • +3.0V to +5.5V Single-Supply Operation
  • 10-Pin µMAX-EP Package (5.0mm x 3.0mm)

Product Details

The MAX2645 is a versatile, high-linearity, low-noise amplifier designed for 3.4GHz to 3.8GHz wireless local loop (WLL), wireless broadband access, and digital microwave radio applications. The device features an externally adjustable bias control, set with a single resistor, that allows the user to meet minimum linearity requirements while minimizing current consumption. The amplifier's high-gain, low-noise performance and adjustable input third-order intercept (IP3) allow it to be used as a low-noise amplifier (LNA) in the receive path, a PA predriver in the transmit path, or as an LO buffer.

The MAX2645 features a logic-level gain control that provides a 25dB step reduction in gain, which improves IP3 performance for operation during high input signal level conditions. Supply current is reduced from 9mA in high-gain mode to 3mA in low-gain mode. The device also includes a logic-controlled shutdown mode, which reduces supply current to 0.1µA. The MAX2645 operates from a +3V to +5.5V supply and is offered in the miniature 10-pin µMAX® package (5mm x 3mm) with an exposed paddle. Its performance has been optimized for use with the MAX2683/MAX2684 3.5GHz SiGe mixers to provide a complete high-performance, front-end solution for 3.5GHz applications.


  • Digital Microwave Radios
  • Wireless Broadband Access
  • Wireless Local Loop (WLL)

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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.