HMC985

Overview

The HMC985 is an absorptive voltage variable attenuator (VVA) manufactured by Analog Devices Inc. It operates within a frequency range of 20 GHz to 50 GHz and features a 50 Ohms impedance. The device provides a dynamic attenuation range of 35 dB, controlled by an analog DC signal. It utilizes Silicon technology and is supplied in a Die package format.

Feature Summary

• Absorptive architecture for stable performance
• Voltage-controlled attenuation via analog DC signal
• Wideband operation covering 20 GHz to 50 GHz

Applications

• RF signal level control in high-frequency designs
• Test and measurement equipment requiring precise attenuation
• Wireless communication systems operating in the K-band

Procurement Notes

Verify component authenticity through authorized Analog Devices channels. Confirm specific suffix designations match application requirements. Check current supply status as availability may be limited or subject to factory order constraints. Ensure handling procedures comply with electrostatic discharge protocols for bare die components.

Selection Notes

Select this component when analog DC control of RF signal amplitude is required in the 20-50 GHz range. Consider the 35 dB dynamic range and 4.5 dB typical insertion loss against system link budget requirements. Evaluate the bare die package format for integration into custom substrates or modules.

Part Context

The HMC985 belongs to the HMC985 series of microwave integrated circuits from Analog Devices. It is part of a family of absorptive VVAs designed for high-frequency applications. Variants such as the HMC985A operate in similar bands, offering designers options based on specific frequency coverage needs between 10-40 GHz and 20-50 GHz ranges.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for cross-reference information or compatible alternatives within the same product family.