HMC985LP4KE

Overview

The HMC985LP4KE is a GaAs MMIC absorptive voltage variable attenuator (VVA) manufactured by Analog Devices Inc. It operates within a frequency range of 10 GHz to 40 GHz and provides a dynamic attenuation range of 35 dB controlled by an analog DC signal. The device features a 50 Ohm impedance and is housed in a compact LP4KE surface-mount package. Designed for high-performance RF applications, it utilizes silicon-based technology to deliver precise signal level control in wideband systems.

Feature Summary

• Absorptive architecture ensures low reflection coefficients across the operating band
• Analog DC control signal enables continuous voltage-variable attenuation
• Wideband operation covers frequencies from 10 GHz to 40 GHz
• High linearity performance suitable for demanding RF signal processing

Applications

• Test and measurement equipment requiring precise RF signal attenuation
• Wireless communication base stations and infrastructure
• Satellite communication ground stations
• Phased array radar systems

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited supply status. Confirm RoHS compliance details via official datasheets. Ensure storage conditions meet moisture sensitivity levels specified in the manufacturing documentation. Cross-reference lot codes with current production batches to avoid obsolete inventory risks.

Selection Notes

Select this component when wideband attenuation up to 40 GHz is required with analog control precision. Consider the LP4KE package size for space-constrained PCB layouts. Evaluate thermal management requirements as the device dissipates power during operation. Compare against family members like HMC985A if higher frequency ranges up to 50 GHz are needed.

Part Context

Part of the HMC985 series of voltage variable attenuators, the HMC985LP4KE represents Analog Devices' integration of GaAs MMIC technology for high-frequency applications. This series is designed to replace discrete attenuator solutions, offering superior performance in size, weight, and power consumption while maintaining consistent electrical characteristics across the microwave spectrum.

Replacement Considerations

HMC985ALP4KE offers extended frequency coverage up to 50 GHz. HMC985A serves as a broader family alternative with similar functionality but potentially different pinout or packaging variations. Verify interface compatibility and thermal specifications before substituting.