SMV2019-040LF

Overview

The SMV2019-040LF is a silicon hyperabrupt junction tuning varactor diode from Skyworks Solutions, housed in an SOD-323 package. It features a typical quality factor of 500 at 50 MHz and 4 V reverse bias. Capacitance ranges from 0.81 pF to 0.98 pF at 4 V and 0.30 pF to 0.32 pF at 20 V, yielding a capacitance ratio of 2.30. The device supports a maximum reverse voltage of 22 V and operates within -55 °C to +125 °C. SPICE parameters include CJO of 2.25 pF, VJ of 3.5 V, M of 1.4, CP of 0.07 pF, RS of 4.8 Ω, and LS of 0.45 nH.

Feature Summary

• Hyperabrupt junction design optimized for low phase noise performance in wireless systems
• High capacitance ratio achieved at low reverse voltages
• Low series resistance characteristics
• Moisture Sensitivity Level 1 rated for 260 °C soldering

Applications

• Low phase noise voltage-controlled oscillators (VCOs) in wireless systems
• RF and microwave VCOs
• Phase shifters

Procurement Notes

Verify the part number against official Skyworks documentation to ensure accuracy. Confirm that the component meets RoHS compliance standards as indicated by the LF suffix. Check for specific handling requirements regarding moisture sensitivity level 1 and electrostatic discharge precautions during storage and assembly processes.

Selection Notes

Select this component based on required capacitance values and tuning range specifications. Ensure the operating frequency aligns with the specified quality factor metrics. Verify package compatibility with the target PCB layout and confirm thermal management capabilities meet the absolute maximum ratings defined in the datasheet.

Part Context

This component belongs to the SMV2019 to SMV2023 series of silicon hyperabrupt junction varactors. These devices are engineered for high-performance RF applications requiring precise capacitance control. The series offers various packaging options including SOT-23, SOD-323, SC-79, and SOD-882 to suit different design constraints.

Replacement Considerations

SMV2019-079LF serves as a direct substitute within the same series, differing primarily in package type and inductance values.