SMV1705-079LF

Overview

The SMV1705-079LF is a silicon hyperabrupt junction tuning varactor diode from Skyworks Solutions, Inc., designed for battery operation. It features a single common cathode configuration in an SC-79 package with an inductance (LS) of 0.7 nH. The device supports a maximum reverse voltage of 12 V and a power dissipation of 250 mW. Electrical specifications include a typical capacitance of 18.3 pF at 1 V reverse bias and 6.1 pF at 4 V reverse bias, yielding a capacitance ratio of 3.0. Series resistance is typically 0.32 Ω at 470 MHz. Operating temperature ranges from -55 °C to +125 °C.

Feature Summary

• Hyperabrupt junction design optimized for low-noise voltage controlled oscillators
• High capacitance ratio suitable for wideband tuning applications
• Low series resistance characteristics

Applications

• Low-noise VCOs for UHF and VHF wireless systems
• Wideband VCOs operating up to and above 10 GHz
• Battery-powered electronic devices

Procurement Notes

Verify the specific datasheet revision and RoHS compliance status before finalizing procurement. Confirm that the SC-79 package marking matches the required production standards. Ensure handling procedures adhere to ESD precautions, as the component requires protection from electrostatic discharge during transport and assembly.

Selection Notes

Select this component when a high capacitance ratio and low series resistance are required for VCO tuning circuits. Verify that the 12 V reverse voltage rating aligns with the system's control voltage limits. Consider the 0.7 nH parasitic inductance for high-frequency impedance matching above 10 GHz.

Part Context

The SMV1705-079LF belongs to the SMV1705 series of hyperabrupt junction tuning varactors. This series includes variants such as the SMV1705-004LF, which utilizes an SOT-23 package. All members share similar electrical characteristics but differ in physical footprint and parasitic inductance values.

Replacement Considerations

No direct replacement part numbers are documented in the provided source material.