SMV1233-040LF

Overview

The SMV1233-040LF is a silicon hyperabrupt junction tuning varactor diode from the SMV123x series, manufactured by Skyworks Solutions Inc. It is housed in an SOD-882 package with a marking code of B and features a parasitic series inductance (LS) of 0.45 nH. The device operates within a temperature range of -55°C to +125°C and supports a maximum reverse voltage of 15 V. Key electrical specifications include a typical capacitance of 3.00 pF at 1 V and 1.80 pF at 3 V, yielding a capacitance ratio of 1.67 between these voltages. At 3 V and 500 MHz, the series resistance is typically 1.20 Ω.

Feature Summary

• Designed for low tuning voltage Voltage Controlled Oscillators (VCOs)
• Suitable for high-Q resonators in wireless system VCOs operating over 10 GHz
• Characterized for capacitance and resistance performance across temperature variations

Applications

• Low tuning voltage VCOs
• High-Q resonators in wireless system VCOs
• High-volume commercial systems

Procurement Notes

Verify component authenticity against official Skyworks documentation before integration. Confirm that the specific ordering suffix matches the required package type and lead-free compliance status. Ensure handling procedures adhere to industry-standard electrostatic discharge precautions during storage and assembly.

Selection Notes

Select this component when a moderate capacitance value around 3 pF is required alongside a low series resistance to minimize phase noise. The SOD-882 package provides a compact footprint suitable for dense surface mount layouts. Evaluate the capacitance ratio requirements against the available voltage tuning range to ensure adequate frequency modulation capability.

Part Context

This part belongs to the SMV123x family of hyperabrupt junction tuning varactors. Other members in this series include the SMV1231 through SMV1237, which offer varying nominal capacitance values ranging from approximately 1.5 pF to 45 pF. All variants share similar low series resistance characteristics optimized for RF applications.

Replacement Considerations

Direct replacements within the same series include the SMV1233-079LF, which utilizes an SC-70 package instead of SOD-882. Verify pinout compatibility and physical dimensions when substituting packages. Cross-series alternatives require careful evaluation of capacitance ratios and parasitic inductance differences.