CMD279C3 RF Variable Attenuator by Custom MMIC

CMD279C3 RF Variable Attenuator by Custom MMIC

Courtesy of everything RF : CMD279C3 RF Variable Attenuator by Custom MMIC

The CMD279C3 is a positive controlled, wideband GaAs MMIC 5-bit digital attenuator that operates from 2 to 18 GHz (S, C, X, Ku Band). Each bit of the attenuator is controlled by a single voltage of either 0 V or +5 V. The attenuator bit values are 0.5 (LSB), 1, 2, 4, and 8 dB, for a total attenuation of 15.5 dB with an attenuation accuracy of 0.2 dB step error. It has a low insertion loss of 3.5 dB at 9 GHz and can handle an input power of up to 27 dBm. The CMD279C3 is available in a 3 x 3mm QFN surface mount package and is matched to 50 ohms which eliminate the need for RF port matching.

Product Details

    • Part Number : CMD279C3
    • Manufacturer : Custom MMIC
    • Description : 5-Bit Digital Attenuator from 2 to 18 GHz

General Parameters

    • Type : Digital
    • Frequency : 2 to 18 GHz
    • Bits : 5 Bit
    • Channels : 1 Channel
    • Configuration : Solid State
    • Attenuation Range : Up to 15.5 dB
    • Attenuation Accuracy : 0.2 dB
    • Power : 0.45 W
    • P1dB : 26.5 dBm
    • IIP3 : 42 dBm
    • Insertion Loss : 3.2 to 5 dB
    • Switching Time : 25 ns
    • Supply Voltage : 2.5 to 5.5 V
    • Control Voltage : 0 to 5 V
    • Interface : TTL/Serial/Parallel
    • Impedance : 50 Ohms
    • Return Loss : 13 dB
    • Package Type : Surface Mount
    • Package : QFN
    • Dimension : 3×3 mm
    • Operating Temperature : -40 to 85 Degrees C
    • Storage Temperature : -55 to 150 Degrees C
    • RoHS : Yes