DC-to-Microwave, +5V Low-Noise Amplifier

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The MAX2650 is a low-noise amplifier for use from DC to microwave frequencies. Operating from a single +5V supply, it has a flat gain response to 900MHz. The MAX2650's low noise figure and high drive capability make it ideal for a variety of transmit, receive, and buffer applications.

The device is internally biased, eliminating the need for external bias resistors or inductors. In a typical application, the only external components needed are input and output blocking capacitors and a VCC bypass capacitor.

The MAX2650 comes in a 4-pin SOT143 package, requiring minimal board space.
MAX2650: Typical Operating Circuit MAX2650: Typical Operating Circuit Enlarge+

Key Features

  • Internally Biased
  • High Gain: 18.3dB at 900MHz
  • 3.9dB Noise Figure
  • Single +4.5V to +5.5V Operation
  • -1dBm Output 1dB Compression Power
  • Low-Cost Silicon Bipolar Design
  • Ultra-Small SOT143 Package


  • Cellular Base Stations
  • Global Positioning Systems (GPS)
  • ISM Radios
  • Set-Top Boxes
  • Special Mobile Radios
  • Wireless Local Area Networks (WLANs)
  • Wireless Local Loop (WLL)

See parametric specs for Low-Noise Amplifiers (42)

Part NumberRF Freq.
RF Freq.
Noise Figure
Input IP3
(mm x mm)
minmaxSee Notes
MAX2650 010003.619-810182.2 x 2.8
$0.88 @1k

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.
Product Reliability Reports: MAX2650.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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