Features and Benefits

  • Wide Operating Frequency Range
    • MAX2640: 300MHz to 1500MHz
    • MAX2641: 1400MHz to 2500MHz
  • Low Noise Figure
    • MAX2640:
    • 0.9dB at 900MHz
    • MAX2641:
    • 1.2dB at 1575MHz
        1.3dB at 1900MHz
        1.5dB at 2450MHz
  • High Gain
    • MAX2640:
    • 15.1dB at 900MHz
    • MAX2641:
    • 15.7dB at 1575MHz
        14.4dB at 1900MHz
        13.5dB at 2450MHz
  • High Reverse Isolation
    • MAX2640:
    • 40dB at 900MHz
    • MAX2641:
    • 31dB at 1575MHz
        30dB at 1900MHz
        24dB at 2450MHz
  • +2.7V to +5.5V Single-Supply Operation
  • Low 3.5mA Supply Current
  • Ultra-Small SOT23-6 Package

Product Details

The MAX2640/MAX2641 are low-cost, ultra-low-noise amplifiers designed for applications in the cellular, PCS, GPS, and 2.4GHz ISM frequency bands. Operating from a single +2.7V to +5.5V supply, these devices consume only 3.5mA of current while providing a low noise figure, high gain, high input IP3, and an operating frequency range that extends from 300MHz to 2500MHz.

The MAX2640 is optimized for 300MHz to 1500MHz applications, with a typical performance of 15.1dB gain, input IP3 of -10dBm, and a noise figure of 0.9dB at 900MHz. The MAX2641 is optimized for 1400MHz to 2500MHz applications, with a typical performance of 14.4dB gain, an input IP3 of -4dBm, and a noise figure of 1.3dB at 1900MHz.

These devices are internally biased, eliminating the need for external bias resistors and chokes. In a typical application, the only external components needed are a two-element input match, input and output blocking capacitors, and a VCC bypass capacitor.

The MAX2640/MAX2641 are designed on a high-frequency, low-noise, advanced silicon-germanium process and are offered in the space-saving 6-pin SOT23 package.


  • 400MHz/900MHz/2.4GHz ISM-Band Radios
  • Cellular/PCS Handsets
  • Cordless Phones
  • GPS Receivers
  • Wireless Data
  • Wireless Local Area Networks (WLANs)

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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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