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

Product Details

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.

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

Applications/Uses

  • 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)
Parametric specs for Downconverter Mixers
# Channels 1
RF Freq. (MHz) (min) 400
RF Freq. (MHz) (max) 2500
LO Frequency (MHz) (min) 400
LO Frequency (MHz) (max) 2500
IF Frequency (MHz) (min) 10
IF Frequency (MHz) (max) 500
Gain (dB) 14.2
Input IP3 (dBm) -6.1
Noise Figure (dB) 7
VCC (V) 2.7 to 5.5
3.3V Supply Current (mA) 8.7
Footprint (mm x mm) 2.7 x 2.9
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$1.06 @1k
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Simplified Block Diagram

MAX2680, MAX2681, MAX2682: Typical Operating Circuit MAX2680, MAX2681, MAX2682: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX2680/MAX2681/MAX2682 evaluation kits (EV kits) simplify the evaluation of the MAX2680/MAX2681/MAX2682 downconverter mixers. They enable testing of all device functions and require no additional support circuitry. Signal inputs and outputs use SMA connectors to ease the connection of RF test equipment.

All three EV kits share the same PC board but have RF input matching components optimized for each device at an RF frequency of 900MHz. Be sure to select the EV kit for the device that meets your performance needs. Consult the Selector Guide in the MAX2680/MAX2681/MAX2682 data sheet for the various combinations of power gain, input IP3, noise figure, and supply current offered by each device. The IF output matching components are optimized for an IF frequency of 70MHz. All matching components may be changed to match RF frequencies from 400MHz to 2.5GHz and IF frequencies from 10MHz to 500MHz. Consult Tables 2 and 4 in the MAX2680/MAX2681/MAX2682 data sheet for component values appropriate for each device at other RF and IF operating frequencies.

View Details

Features

  • Easy Evaluation of MAX2680/MAX2681/MAX2682
  • Easy Evaluation of All Device Functions
  • +2.7V to +5.5V Single-Supply Operation
  • RF Input Matched to 50Ω at 900MHz
  • IF Output Matched to 50Ω at 70MHz
  • SMA Input and Output Signal Connectors
  • All Critical Peripheral Components Included

Description

The MAX2680/MAX2681/MAX2682 evaluation kits (EV kits) simplify the evaluation of the MAX2680/MAX2681/MAX2682 downconverter mixers. They enable testing of all device functions and require no additional support circuitry. Signal inputs and outputs use SMA connectors to ease the connection of RF test equipment.

All three EV kits share the same PC board but have RF input matching components optimized for each device at an RF frequency of 900MHz. Be sure to select the EV kit for the device that meets your performance needs. Consult the Selector Guide in the MAX2680/MAX2681/MAX2682 data sheet for the various combinations of power gain, input IP3, noise figure, and supply current offered by each device. The IF output matching components are optimized for an IF frequency of 70MHz. All matching components may be changed to match RF frequencies from 400MHz to 2.5GHz and IF frequencies from 10MHz to 500MHz. Consult Tables 2 and 4 in the MAX2680/MAX2681/MAX2682 data sheet for component values appropriate for each device at other RF and IF operating frequencies.

View Details

Features

  • Easy Evaluation of MAX2680/MAX2681/MAX2682
  • Easy Evaluation of All Device Functions
  • +2.7V to +5.5V Single-Supply Operation
  • RF Input Matched to 50Ω at 900MHz
  • IF Output Matched to 50Ω at 70MHz
  • SMA Input and Output Signal Connectors
  • All Critical Peripheral Components Included

Description

The MAX2680/MAX2681/MAX2682 evaluation kits (EV kits) simplify the evaluation of the MAX2680/MAX2681/MAX2682 downconverter mixers. They enable testing of all device functions and require no additional support circuitry. Signal inputs and outputs use SMA connectors to ease the connection of RF test equipment.

All three EV kits share the same PC board but have RF input matching components optimized for each device at an RF frequency of 900MHz. Be sure to select the EV kit for the device that meets your performance needs. Consult the Selector Guide in the MAX2680/MAX2681/MAX2682 data sheet for the various combinations of power gain, input IP3, noise figure, and supply current offered by each device. The IF output matching components are optimized for an IF frequency of 70MHz. All matching components may be changed to match RF frequencies from 400MHz to 2.5GHz and IF frequencies from 10MHz to 500MHz. Consult Tables 2 and 4 in the MAX2680/MAX2681/MAX2682 data sheet for component values appropriate for each device at other RF and IF operating frequencies.

View Details

Features

  • Easy Evaluation of MAX2680/MAX2681/MAX2682
  • Easy Evaluation of All Device Functions
  • +2.7V to +5.5V Single-Supply Operation
  • RF Input Matched to 50Ω at 900MHz
  • IF Output Matched to 50Ω at 70MHz
  • SMA Input and Output Signal Connectors
  • All Critical Peripheral Components Included

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Parameters

Parametric specs for Downconverter Mixers
# Channels 1
RF Freq. (MHz) (min) 400
RF Freq. (MHz) (max) 2500
LO Frequency (MHz) (min) 400
LO Frequency (MHz) (max) 2500
IF Frequency (MHz) (min) 10
IF Frequency (MHz) (max) 500
Gain (dB) 14.2
Input IP3 (dBm) -6.1
Noise Figure (dB) 7
VCC (V) 2.7 to 5.5
3.3V Supply Current (mA) 8.7
Footprint (mm x mm) 2.7 x 2.9
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$1.06 @1k

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

Applications/Uses

  • 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)

Description

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.

Simplified Block Diagram

MAX2680, MAX2681, MAX2682: Typical Operating Circuit MAX2680, MAX2681, MAX2682: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal