HMC204C8

Overview

The HMC204C8 is a passive miniature frequency doubler manufactured by Analog Devices Inc. It operates within an input frequency range of 4 GHz to 8 GHz, utilizing GaAs Schottky diode and balun technology. The device provides typical conversion loss of 16 dB at the fundamental output frequency (Fo) and achieves 40 dB typical suppression of undesired fundamental and higher-order harmonics relative to the input signal level. It features no DC bias requirement and adds no measurable phase noise to the multiplied signal. The component is housed in a non-hermetic surface-mount package.

Feature Summary

• Passive operation requiring no DC bias voltage
• High harmonic suppression with 40 dB typical isolation of undesired frequencies
• Minimal additive phase noise on the multiplied output signal
• Compact surface-mount design suitable for space-constrained applications

Applications

• Wireless Local Loop systems
• LMDS (Local Multipoint Distribution Service) equipment
• VSAT (Very Small Aperture Terminal) communications
• Point-to-Point Radio links
• Test and measurement instrumentation

Procurement Notes

Verify part authenticity through authorized Analog Devices distributors or certified partners. Confirm package integrity and pin alignment upon receipt. Check for RoHS compliance markings as specified in official documentation. Ensure storage conditions meet moisture sensitivity level requirements prior to soldering. Validate datasheet revisions against current ordering information to avoid obsolete variants.

Selection Notes

Select this component when designing circuits requiring frequency doubling in the 4-8 GHz input range without active biasing. Consider the 16 dB conversion loss impact on system gain budget. Evaluate thermal management needs despite passive operation. Compare alternative MMIC doublers if specific harmonic rejection levels below 40 dB are insufficient for the application environment.

Part Context

The HMC204C8 belongs to the Hittite Microwave (now Analog Devices) family of GaAs MMIC frequency multipliers. It shares technological foundations with other Hittite mixers and doublers, emphasizing small size and reliability. This specific model targets RF front-end applications where compactness and passive operation are critical constraints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices technical support for direct replacements or cross-reference options based on specific electrical requirements.