HMC-C028

Overview

The HMC-C028 is a wideband GaAs InGaP Voltage Controlled Oscillator module operating from 4 to 8 GHz. It integrates the resonator, negative resistance device, and varactor diode within a hermetically sealed package. The internal voltage regulator ensures excellent frequency pushing of 0.2 MHz/V. An output buffer amplifier boosts power to +20 dBm, sufficient to drive mixers. It requires a single positive supply of +8 to +15V at 185 mA current draw.

Feature Summary

• Integrates resonator, negative resistance device, and varactor diode in monolithic construction
• Internal voltage regulator provides low frequency pushing for stability
• Output buffer amplifier delivers high power suitable for driving mixers
• Field replaceable SMA connectors facilitate easy integration

Applications

• Industrial and medical equipment
• Test and measurement equipment
• Military radar, electronic warfare, and ECM systems
• Lab instrumentation

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to obsolete lifecycle status. Confirm RoHS compliance and hermetic seal integrity upon receipt. Ensure supply voltage matches specified +8 to +15V range during installation. Check for field-replaceable SMA connector condition prior to deployment in critical RF applications.

Selection Notes

Select this module when wide tuning bandwidth and high output power are required without external resonators. Consider its monolithic construction for superior phase noise performance across temperature ranges. Evaluate compatibility with +8 to +15V single supply constraints. Assess suitability for radar and EW applications requiring robust hermetic sealing.

Part Context

Manufactured by Analog Devices (formerly Hittite Microwave Corporation), the HMC-C028 belongs to a family of wideband RF modules. It differs from amplifiers like the HMC-C020 or LNAs like the HMC-C022 by functioning as a complete oscillator solution. Its design focuses on providing stable, high-power oscillation in a compact, shielded environment for demanding microwave frequencies.

Replacement Considerations

No direct public substitute part numbers are confirmed for immediate replacement. The component lifecycle status is listed as Obsolete. Engineers should evaluate newer wideband VCO modules from Analog Devices that offer similar frequency ranges and output power specifications while ensuring interface compatibility.