SMV1129-079LF

Overview

The SMV1129-079LF is a silicon hyperabrupt junction tuning varactor designed for low phase noise voltage controlled oscillators. It features low series resistance suitable for tunable high-Q resonant circuits in wireless system local oscillators up to frequencies beyond 2.5 GHz. The device operates within a reverse voltage range of 0 to 12 V, with a typical capacitance of 19.0 pF at 1 V and 4.7 pF at 12 V. Key electrical specifications include a maximum reverse current of 20 nA at 10 V, a power dissipation rating of 250 mW, and a forward current limit of 20 mA. The component is housed in an SC-79 package.

Feature Summary

• High-Q performance optimized for low phase noise applications
• Low series resistance facilitates use in high-Q resonant circuits
• Rated for MSL1 moisture sensitivity level and 260 °C soldering

Applications

• Low phase noise voltage controlled oscillators (VCOs)
• Tunable high-Q resonant circuits in wireless system local oscillators

Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm compliance with RoHS standards and lead-free requirements. Confirm that the procurement channel provides valid certificates of conformance. Ensure storage conditions adhere to manufacturer guidelines regarding moisture sensitivity levels to prevent damage during solder assembly processes.

Selection Notes

Select this component when designing circuits requiring low series resistance to minimize phase noise in VCOs operating beyond 2.5 GHz. Evaluate the capacitance ratio and Q-factor requirements against the datasheet specifications. Ensure the design accommodates the specified absolute maximum ratings for reverse voltage and power dissipation to maintain device reliability under operational stress.

Part Context

This part belongs to the Skyworks Solutions hyperabrupt junction varactor family, specifically engineered for RF tuning applications. It utilizes a silicon construction to provide stable capacitance variation over a defined reverse voltage range. The SC-79 surface mount package allows for compact integration into modern wireless communication systems and high-frequency circuit designs.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.