SMV1231-040LF

Overview

The SMV1231-040LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV123x series, designed for Voltage Controlled Oscillators (VCOs) requiring low tuning voltage operation. It features a single configuration in an SOD-882 package with a maximum reverse voltage of 15 V and a forward current rating of 20 mA. The device operates within a temperature range of -55 °C to +125 °C. At 1 V reverse bias, the typical capacitance is 1.58 pF, decreasing to 0.613 pF at 6 V. The series resistance is typically 2.90 Ω at 3 V and 500 MHz.

Feature Summary

• Hyperabrupt junction design optimized for low tuning voltage VCO applications
• Low series resistance characteristics suitable for high-Q resonators in wireless systems
• Packages rated for Moisture Sensitivity Level 1 (MSL1) at 260 °C per JEDEC J-STD-020

Applications

• Low tuning voltage Voltage Controlled Oscillators (VCOs)
• High-Q resonators in wireless system VCOs
• High-volume commercial systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and lead-free status by checking the marking code 'A' on the SOD-882 package against official datasheets. Ensure handling procedures follow ESD precautions and moisture sensitivity guidelines during storage and soldering.

Selection Notes

Select this component when a small footprint SOD-882 package is required for RF tuning circuits. The SMV1231 variant offers the lowest capacitance in its series, making it appropriate for higher frequency ranges compared to other members of the SMV123x family. Verify that the 15 V reverse voltage rating meets the specific circuit requirements.

Part Context

The SMV1231-040LF belongs to the Skyworks SMV123x series of surface mount plastic varactor diodes. This series includes variants such as the SMV1232, SMV1233, and others, which differ primarily in their nominal capacitance values while sharing similar electrical characteristics and package options like SC-79, SOD-323, and SOT-23.

Replacement Considerations

Direct substitutes within the same series include the SMV1231-079LF (SC-79 package) and SMV1231-074LF (SOD-323 package). Other part numbers in the SMV123x family offer different capacitance values but share identical absolute maximum ratings and operating principles.