CMD279

Attenuators Overview

The Qorvo CMD279 is a space-qualified, positive-controlled GaAs MMIC 5-bit digital attenuator die. It operates within a frequency range of 2 to 30 GHz and provides a total attenuation range of 15.5 dB with 0.5 dB step control. Each bit is controlled by a single voltage level of either 0 V or +5 V. The component features full passivation for enhanced reliability and moisture protection, ensuring performance in demanding environments.

Attenuators Feature Summary

• Space-qualified design for high-reliability applications
• Positive-controlled operation using standard 0 V or +5 V logic levels
• Ultra-wideband performance across the 2 to 30 GHz spectrum
• Full passivation layer providing increased reliability and moisture protection

Attenuators Applications

• Satellite communication systems
• Electronic warfare (EW) systems
• Advanced radar systems
• Defense-related communication infrastructure

Attenuators Procurement Notes

Verify that the specific order includes the space-qualified variant, as standard commercial versions may lack required environmental certifications. Confirm that the procurement specification explicitly requires the GaAs MMIC die format rather than a packaged module. Ensure that the receiving facility has the necessary handling protocols for bare dies, including static discharge protection and cleanroom assembly capabilities. Cross-reference the datasheet revision to confirm compatibility with existing control circuitry designs.

Attenuators Selection Notes

Select the CMD279 when a wide bandwidth covering 2 to 30 GHz is required alongside precise 0.5 dB step resolution. This component is suitable for designs needing positive logic control without additional inversion circuitry. Consider this part for applications where space qualification and moisture resistance are critical constraints. Evaluate the need for bare die integration versus packaged alternatives based on system size and weight requirements.

Attenuators Part Context

The CMD279 belongs to Qorvo's portfolio of custom MMIC components designed for defense and aerospace markets. It complements other digital attenuators like the CMD280 and CMD328K3, offering a specific 5-bit configuration optimized for ultra-wideband operations. These devices support the development of compact, high-performance signal processing chains for next-generation tactical and strategic systems.

Attenuators Replacement Considerations

Publicly confirmed substitutes include the CMD279C3 and CMD280. Verify if the C3 suffix denotes a specific process or packaging variation that affects mechanical integration. Ensure that any replacement maintains the same positive control logic and frequency range specifications.