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