HMC998

Overview

The HMC998 is a GaAs MMIC distributed amplifier manufactured by Analog Devices Inc. It operates over a DC to 40 GHz frequency range with a typical small-signal gain of 16 dB and an output P1dB of +23 dBm. The device features low noise figure, high linearity, and integrated biasing control via the HMC980 active bias controller. Packaged in a compact surface-mount format, it supports wideband RF signal chain applications requiring high gain and flat response across multi-octave bandwidths.

Feature Summary

• Distributed amplifier topology enabling ultra-wideband operation from DC to 40 GHz
• Integrated active bias control interface for optimized performance stability
• High linearity and low noise figure suitable for demanding RF front-ends

Applications

• Wideband test and measurement equipment
• Military electronic warfare systems
• Satellite communication ground stations

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm lot traceability and RoHS compliance status prior to integration. Ensure handling procedures meet ESD protection standards for GaAs MMIC devices. Review latest datasheet revisions for any design-in updates or recommended peripheral components.

Selection Notes

Select this component when designing systems requiring consistent gain and phase response across extremely wide bandwidths. Consider thermal management requirements due to power dissipation characteristics. Evaluate compatibility with active bias controllers like the HMC980 for simplified power sequencing and protection. Assess PCB layout constraints for high-frequency signal integrity at millimeter-wave frequencies.

Part Context

The HMC998 belongs to Analog Devices' Hittite Microwave Corporation portfolio, specializing in high-performance RF and microwave monolithic microwave integrated circuits (MMICs). It complements other wideband amplifiers in the series, offering distinct advantages in gain flatness and output power density compared to narrower-band alternatives.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices technical support for cross-reference recommendations based on specific system requirements.