The 1SV290(TPH3,F) is a variable capacitance diode (varicap diode) manufactured by Toshiba Semiconductor and Storage. These diodes are designed to exhibit a change in capacitance with changes in applied reverse voltage. They are commonly used in applications such as voltage-controlled oscillators (VCOs), electronic tuning circuits, and frequency modulators.

Applications

• Voltage-Controlled Oscillators (VCOs): Tuning the frequency of oscillators by varying the reverse voltage applied to the diode.
• Electronic Tuning Circuits: Used in radio and television tuners to select desired frequencies.
• Frequency Modulators: Modulating the frequency of a carrier signal based on an input voltage.
• Automatic Frequency Control (AFC) Circuits: Compensating for frequency drift in oscillators.
• Parametric Amplifiers: Using the variable capacitance to amplify signals.

Features

• Variable Capacitance: Exhibits a change in capacitance with changes in reverse voltage.
• High Tuning Ratio: Provides a wide capacitance range for tuning.
• Low Series Resistance: Minimizes losses and improves performance.
• Small Package Size: Allows for compact circuit designs.
• High Reliability: Ensures stable performance and long life.
• Surface Mount Technology (SMT): Facilitates automated assembly.

Benefits

• Precise Frequency Control: Allows for accurate tuning and frequency adjustments.
• Improved Circuit Performance: Low series resistance enhances circuit performance.
• Reduced Circuit Size: Small package size allows for compact designs.
• Enhanced System Reliability: High reliability ensures stable operation.
• Cost-Effective Solution: Provides a balance of performance and affordability.

Technical Specifications

The 1SV290(TPH3,F) varicap diode typically exhibits a capacitance range that varies with the applied reverse voltage, usually between a few picofarads at maximum reverse voltage to a higher value at low reverse voltage. The tuning ratio, which is the ratio of maximum to minimum capacitance, is a key specification. The series resistance is kept low to minimize losses. The diode is commonly available in small surface-mount packages. Refer to the Toshiba datasheet for detailed specifications, including capacitance-voltage characteristics, series resistance, and breakdown voltage.