The SMV1705-079 is a silicon hyperabrupt varactor diode manufactured by Alpha Industries (now Skyworks Solutions). This diode is specifically designed for voltage-controlled oscillator (VCO) and tunable filter applications, where precise and reliable capacitance variation is crucial. Its hyperabrupt junction provides a wide tuning range and high sensitivity, making it suitable for demanding frequency control applications.

Applications:

• Voltage-Controlled Oscillators (VCOs): Used to tune the oscillation frequency in wireless communication systems, test equipment, and signal generators.
• Tunable Filters: Implemented in RF front-ends for frequency selection and signal conditioning.
• Phase-Locked Loops (PLLs): Used in frequency synthesizers for precise frequency control and synchronization.
• Frequency Multipliers: Utilized to generate higher-frequency signals from lower-frequency sources.
• Tunable Matching Networks: Implemented in RF circuits to optimize impedance matching over a range of frequencies.

Features:

• Hyperabrupt Junction: Provides a large capacitance variation with respect to the applied voltage.
• High Tuning Ratio: Offers a wide frequency tuning range for VCO and filter applications.
• Low Series Resistance: Minimizes insertion loss and improves the performance of tunable circuits.
• High Quality Factor (Q): Ensures low noise and high selectivity in resonant circuits.
• Small Package Size: Allows for compact circuit designs and high-density integration.

Benefits:

• Wide Tuning Range: Enables flexible frequency control in VCO and tunable filter applications.
• Precise Frequency Control: Hyperabrupt junction allows for accurate and stable frequency tuning.
• Improved Circuit Performance: Low series resistance and high Q factor minimize losses and enhance signal quality.
• Reduced Component Count: Integrated design simplifies circuit design and reduces the number of external components.
• Compact Design: Small package size allows for integration into space-constrained applications.

Technical Specifications: The SMV1705-079 varactor diode typically features a capacitance range of 2.4 pF to 11.2 pF at 2V and 20V reverse voltage, respectively. The series resistance is typically 1.2 ohms at 50 MHz. The breakdown voltage is typically 22V. It is typically available in a SOD-323 package. The operating temperature range is typically -55°C to +125°C.