SMV1705-004LF

Overview

The SMV1705-004LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV1705 series, designed for battery-operated wireless systems. It features a common cathode configuration in an SOT-23 (SC-79) package with a series inductance of 1.4 nH. The device supports a maximum reverse voltage of 12 V and operates within a temperature range of -55 °C to +125 °C. At 1 MHz, typical capacitance values are 18.3 pF at 1 V reverse bias and 6.1 pF at 4 V reverse bias, yielding a typical capacitance ratio of 3.0. Series resistance is typically 0.32 Ω at 470 MHz.

Feature Summary

• Hyperabrupt junction design optimized for high capacitance ratios suitable for low-noise VCOs
• Low series resistance characteristics supporting wideband UHF and VHF applications
• Moisture sensitivity level 1 rating allowing compatibility with standard lead-free soldering processes

Applications

• Low-noise voltage controlled oscillators (VCOs)
• Wideband UHF and VHF wireless systems
• Battery-powered electronic circuits

Procurement Notes

Verify component authenticity through official Skyworks channels or authorized distributors. Confirm RoHS compliance and lead-free status via the datasheet. Ensure ESD handling precautions are strictly followed during storage and assembly to prevent damage from electrostatic discharge events.

Selection Notes

Select this component when designing circuits requiring a common cathode varactor in an SOT-23 package. The 1.4 nH series inductance and specific capacitance profile make it suitable for frequencies up to and above 10 GHz. Verify that the 12 V reverse voltage limit meets the circuit's operational requirements.

Part Context

This part belongs to the SMV1705 series of hyperabrupt junction tuning varactors. The series includes variants such as the SMV1705-079LF, which utilizes a Green™ package marking and offers different electrical characteristics. The SMV1705 group is specifically engineered for battery operation with low reverse voltage ratings.

Replacement Considerations

The SMV1705-079LF is a documented alternative within the same series, featuring a Green™ package and lower series inductance (0.7 nH). Designers must verify pinout compatibility and electrical parameter differences before substitution.