The SMV1234-079 is a silicon hyperabrupt junction tuning varactor diode manufactured by Alpha Industries (now Skyworks Solutions, Inc.). This diode is designed for voltage-variable capacitor applications, offering excellent tuning linearity and high Q-factor. It is commonly used in voltage-controlled oscillators (VCOs), tunable filters, and phase shifters.

Applications

• Voltage-controlled oscillators (VCOs)
• Tunable filters
• Phase shifters
• Frequency multipliers
• Parametric amplifiers

Features

• Silicon hyperabrupt junction
• High tuning ratio
• High Q-factor
• Low series resistance
• Surface mount package

Benefits

• Wide tuning range enables flexible frequency control.
• Excellent linearity ensures precise tuning characteristics.
• High Q-factor minimizes losses in resonant circuits.
• Small size allows for compact circuit designs.
• Reliable performance in demanding RF applications.

Specifications

The SMV1234-079 features a capacitance range of approximately 1.7 pF to 4.3 pF when varying the reverse voltage from 1 V to 8 V. The Q-factor at 50 MHz is typically greater than 200. The series resistance is low, typically less than 1 Ohm. The diode is available in a small surface mount package. The operating temperature range is typically from -55°C to +125°C.