400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers

Please check latest availability status for a specific part variant.


The MAX2680/MAX2681/MAX2682 miniature, low-cost, low-noise downconverter mixers are designed for low-voltage operation and are ideal for use in portable communications equipment. Signals at the RF input port are mixed with signals at the local oscillator (LO) port using a double-balanced mixer. These downconverter mixers operate with RF input frequencies between 400MHz and 2500MHz, and downconvert to IF output frequencies between 10MHz and 500MHz.

The MAX2680/MAX2681/MAX2682 operate from a single +2.7V to +5.5V supply, allowing them to be powered directly from a 3-cell NiCd or a 1-cell Lithium battery. These devices offer a wide range of supply currents and input intercept (IIP3) levels to optimize system performance. Additionally, each device features a low-power shutdown mode in which it typically draws less than 0.1µA of supply current. Consult the Selector Guide for various combinations of IIP3 and supply current.

The MAX2680/MAX2681/MAX2682 are manufactured on a high-frequency, low-noise, advanced silicon-germanium process and are offered in the space-saving 6-pin SOT23 package.
MAX2680, MAX2681, MAX2682: Typical Operating Circuit MAX2680, MAX2681, MAX2682: Typical Operating Circuit Enlarge+

Key Features

  • 400MHz to 2.5GHz Operation
  • +2.7V to +5.5V Single-Supply Operation
  • Low Noise Figure: 6.3dB at 900MHz (MAX2680)
  • High Input Third-Order Intercept Point (IIP3 at 2450MHz)
    • -6.9dBm at 5.0mA (MAX2680)
    • +1.0dBm at 8.7mA (MAX2681)
    • +3.2dBm at 15.0mA (MAX2682)
  • < 0.1µA Low-Power Shutdown Mode
  • Ultra-Small Surface-Mount Packaging


  • 400MHz/900MHz/2.4GHz ISM-Band Radios
  • Cell Phones/Cordless Phones
  • IEEE 802.11 and Wireless Data
  • Personal Communications Systems (PCS)
  • Wireless Local Loop (WLL)

See parametric specs for Downconverter Mixers (27)

Part NumberChannelsRF Freq.
RF Freq.
LO Frequency
LO Frequency
IF Frequency
IF Frequency
Input IP3
Noise Figure
3.3V Supply Current
(mm x mm)
minmaxminmaxminmaxSee Notes
MAX2680 1400250040025001050011.6- to 5.552.7 x 2.9
$0.90 @1k
MAX2681 14.2-6.178.7
$1.06 @1k
MAX2682 14.7-1.86.515
$1.16 @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.

MAX2680EVKIT: Evaluation Kit for the MAX2680/MAX2681/MAX2682
MAX2681EVKIT: Evaluation Kit for the MAX2680/MAX2681/MAX2682
MAX2682EVKIT: Evaluation Kit for the MAX2680/MAX2681/MAX2682
Product Reliability Reports: MAX2682.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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