SMV1801-079LF

Varactor Diodes Ls=.7nH SC-79 Single

SMV1801-079LF – 2.89pF Varactor Diode – Skyworks Solutions

Skyworks Solutions’ SMV1801-079LF varactor diode delivers precise voltage-controlled capacitance for high-frequency tuning applications. Engineered for stability and performance, this surface-mount component enables efficient signal control in compact designs. PCX ensures authentic Skyworks components with same-day shipping and dedicated technical support.

Key Features

Capacitance: 2.89pF @ 28V, 1MHz
High Capacitance Ratio: 22.0 (C1/C28)
Voltage Rating: 30V Peak Reverse Voltage
Low Series Inductance: 0.7nH (Ls)
Temperature Range: -55°C to 125°C (TJ)
Compact Package: SC-79/SOD-523 (Supplier Device Package: SC-79)

Technical Details
This single varactor diode features a surface-mount SC-79 package optimized for high-frequency circuits. With its wide operating temperature range (-55°C to 125°C junction temperature), it maintains stable capacitance characteristics under varying environmental conditions. The diode’s 22.0 capacitance ratio ensures significant tuning range with minimal voltage adjustment, while the 0.7nH series inductance supports RF performance up to microwave frequencies.

Typical Applications

Voltage-Controlled Oscillators (VCOs) in communication systems
RF tuning circuits for smartphones and IoT devices
Phase-locked loops (PLL) and frequency synthesizers
Automatic Frequency Control (AFC) modules
Impedance matching networks

About Skyworks Solutions
Skyworks Solutions Inc. is a global leader in high-performance analog semiconductors, renowned for advancing wireless connectivity solutions. With decades of RF innovation, Skyworks powers cutting-edge applications in 5G infrastructure, aerospace, and mobile technology, holding over 3,000 patents for signal processing components.
The company maintains rigorous quality certifications (including IATF 16949 and ISO 9001), ensuring component reliability for mission-critical systems. Skyworks’ vertically integrated manufacturing and extensive environmental testing guarantee consistent performance across industrial, automotive, and consumer temperature ranges.

About Varactor Diodes
Varactor diodes (varicaps) are specialized semiconductor devices that function as voltage-controlled capacitors, essential for electronic tuning without mechanical components. Their capacitance varies inversely with applied reverse bias voltage, enabling precise frequency adjustment in resonant circuits. This makes them indispensable in modern RF design where miniaturization and stability are paramount.
Compared to mechanical capacitors, varactors offer faster response times, higher reliability, and reduced footprint—critical advantages in space-constrained applications like mobile devices and satellite communications. Their linear capacitance-voltage characteristics allow designers to implement efficient frequency modulation, filtering, and signal conditioning across wireless and broadcast systems.

Packaging Options
Available in industry-standard formats for automated assembly: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel®. Specify your preferred option at checkout for optimized handling.

FAQs
Question: What is the significance of the 22.0 capacitance ratio?
Answer: It indicates the diode’s maximum-to-minimum capacitance range (22:1) when voltage shifts from 1V to 28V, enabling wide-frequency tuning.

Question: Is this diode RoHS compliant?
Answer: Yes, the SMV1801-079LF meets all RoHS 3 standards for hazardous substance restrictions.

Question: Can I use this varactor for 5G applications?
Answer: Absolutely. Its 0.7nH inductance and SC-79 package make it ideal for mmWave and sub-6GHz 5G tuning circuits.

Question: How does temperature affect performance?
Answer: Stable operation is guaranteed from -55°C to 125°C. Capacitance drift is minimized through Skyworks’ proprietary epitaxial design.

Question: What soldering profiles are recommended?
Answer: Follow JEDEC J-STD-020 guidelines for Pb-free reflow. Refer to the datasheet for thermal specifics.

Question: Does PCX provide design support?
Answer: Yes. Contact our engineering team for application schematics and SPICE models.

Note: Product image is representational. Download full datasheet for detailed specifications.

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