Analog Devices HMC8108 Low Noise Converters

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Analog Devices HMC8108 Low Noise Converters
Analog Devices HMC8108 Low Noise Converters

Analog Devices HMC8108 Low Noise Converters

Analog Devices HMC8108 Low Noise Converters are offered as compact, X-band, gallium arsenide (GaAs), monolithic microwave integrated circuit (MMIC) in-phase/quadrature (I/Q) converters. The HMC8108 series converts 9GHz to 10GHz radio frequency (RF) input signals to a typical 60MHz single-ended intermediate frequency (IF) signal at its output. The HMC8108 Converters deliver a small signal conversion gain of 13dB with a noise figure of 2dB. The converters also have 20dBc image rejection.

The HMC8108 Converters are designed with a low noise amplifier followed by an image reject mixer. The image reject mixer eliminates the need for a filter following the low noise amplifier and removes thermal noise at the image frequency. I/Q mixer outputs are provided, and an external 90° hybrid is needed to select the required sideband. Compatible with surface-mount manufacturing techniques, the HMC8108 converters serve as a much smaller alternative to hybrid style, image reject mixer, down converter assemblies.
Features

  • Conversion gain: 13dB typical
  • Image rejection: 20dBc typical
  • Noise figure: 2dB typical
  • Input power for 1dB compression: −4dBm typical
  • Input third-order intercept: 6dBm typical
  • Output saturated power: 10dBm typical
  • LO leakage at the IF port: −20dBm typical
  • LO leakage at the RF port: −37dBm typical
  • 32-terminal, 5mm × 5mm, ceramic leadless chip carrier (LCC)
Applications

  • Point-to-point and point-to-multipoint radios
  • Military radar
  • Satellite communications
Block Diagram
Block Diagram

Analog Devices EVAL-HMC8108 Evaluation Board

Analog Devices EVAL-HMC8108 Evaluation Board helps designers evaluate the features of the 9GHz to 10GHz HMC8108 Low Noise Converters. Developed using RF circuit design techniques, the board provides a sufficient number of via holes to connect the top and bottom ground planes. Signal lines with 50Ω impedance connect the package ground leads and exposed pad directly to the ground plane.

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