HMC394LP4

Overview

The HMC394LP4 is a low-noise GaAs HBT programmable 5-bit counter designed for surface-mount applications. It operates from DC to 2.2 GHz, providing continuous division ratios from N=2 to 32. The device features an output power of 4 dBm and requires a supply voltage between 4.75 V and 5.25 V, with typical operation at 5 V. It draws 194 mA of operating current. Packaged in a QFN-24 (4x4 mm) leadless surface mount case, it supports temperatures from -40°C to +85°C. The component utilizes GaAs technology and delivers low added SSB phase noise of -153 dBc/Hz at 100 kHz offset.

Feature Summary

• Programmable 5-bit counter architecture enabling continuous frequency division from N=2 to 32
• Low noise GaAs HBT construction optimized for minimal phase noise degradation
• Wideband operational capability extending from DC up to 2.2 GHz input frequencies
• Surface-mount QFN-24 package design facilitating automated PCB assembly

Applications

• Low noise synthesizer systems
• Satellite communication equipment
• Point-to-point and point-to-multipoint radio links
• Local Multipoint Distribution Service (LMDS)
• SONET network infrastructure

Procurement Notes

Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm RoHS compliance status as indicated by specific manufacturing lot codes. Ensure storage conditions maintain integrity of the GaAs HBT die. Validate pin compatibility with QFN-24 footprints during integration planning. Review latest datasheet revisions for any updates to electrical characteristics or thermal recommendations prior to final design approval.

Selection Notes

Select this component when designing systems requiring precise frequency division with minimal phase noise addition at high frequencies. The GaAs HBT technology offers superior performance compared to standard silicon alternatives for RF applications. Consider the 194 mA current draw for power budget calculations. The wide division ratio range provides flexibility in synthesizer loop filter design. Ensure the 5 V supply requirement aligns with available system rails.

Part Context

Part of the HMC394 series from Analog Devices, focusing on high-frequency prescaler solutions. The LP4 suffix denotes the specific leadless surface mount package variant. Designed to complement other RF components in signal generation chains. Shares architectural similarities with other programmable counters in the portfolio but distinguished by its specific GaAs process node and frequency coverage.

Replacement Considerations

HMC394LP4E serves as a verified equivalent alternative within the same product family.