SMV1405-079LF

Overview

The SMV1405-079LF is a silicon abrupt junction tuning varactor diode from Skyworks Solutions, packaged in the SC-79 surface-mount format. It features an internal series inductance of 0.7 nH and is designed for Voltage Controlled Oscillators (VCOs) requiring tight capacitance tolerances. The device supports operation up to frequencies above 10 GHz with a maximum reverse voltage of 30 V and forward current of 20 mA. At 0.5 V reverse bias, the typical capacitance is 2.1 pF, dropping to 0.63 pF at 30 V. The Q factor is typically 3200 at 4 V and 50 MHz, with a series resistance of 0.80 Ω at 500 MHz.

Feature Summary

• High Q performance suitable for high-Q resonators in wireless system VCOs
• Low series resistance characteristics optimized for low phase noise applications
• Capacitance values characterized over temperature range for stability

Applications

• Voltage Controlled Oscillators (VCOs)
• High-Q resonators in wireless systems
• High volume commercial RF systems

Procurement Notes

Verify component authenticity through authorized distributors or Skyworks-certified channels. Confirm RoHS compliance and lead-free status via the datasheet documentation. Ensure proper ESD handling precautions are observed during storage and assembly. Check moisture sensitivity level ratings before soldering to prevent package damage.

Selection Notes

Select this component when tight capacitance tolerance and high Q factors are required for VCO designs operating above 10 GHz. Compare against other members of the SMV14xx series based on specific capacitance needs at varying reverse voltages. Ensure the SC-79 package dimensions align with the target PCB layout constraints.

Part Context

This part belongs to the SMV1405 to SMV1430 group of plastic-packaged abrupt junction tuning varactors. These devices share similar electrical characteristics but vary in nominal capacitance values to suit different tuning ranges within the same family architecture.

Replacement Considerations

Other parts in the SMV1405–SMV1430 series may serve as alternatives if capacitance requirements differ. Verify that substitute components maintain compatible package types and electrical parameters such as Q factor and series resistance.