GC15008-00

Overview

The GC15008-00 is a silicon epitaxial mesa Frequency Linear Tuning Varactor (FLTVAR) designed for wideband linear tuning in VCO and filter applications. It operates with a minimum breakdown voltage of 22V at 10μA leakage current. The device exhibits a capacitance of 2.0pF at -4V reverse bias and 0.4pF at -20V reverse bias, measured at 1MHz. Its typical sensitivity is 0.11, and it achieves a tuning ratio of 13:1 between zero-bias and 15V conditions. The component maintains a typical Q factor of 900 at 50MHz under 4V reverse bias.

Feature Summary

• Frequency linear tuning characteristics enable over one octave of linear tuning without external linearization circuits.
• High quality factor and low surface noise contribute to reduced phase noise in voltage-controlled oscillator applications.
• Computer-controlled grown junction epitaxy ensures superior passivation for high reliability and low leakage current.

Applications

• Voltage-Controlled Oscillators (VCOs)
• Tunable Filters
• Modulators
• Amplifiers

Procurement Notes

Verify the specific package style required for the design, as the base model number corresponds to chip-style packaging intended for hybrid circuits. Confirm that the non-hermetic or hermetic variants align with assembly constraints. Ensure ESD precautions are strictly followed during handling due to component sensitivity. Consult the manufacturer regarding special terminal finish requirements if gold plating is not suitable for the application.

Selection Notes

Select this varactor when frequency linearity is critical for maintaining constant modulation sensitivity and high modulation rates. The device is suitable for Ku-band applications requiring wideband tuning capabilities. Evaluate the trade-off between the 2.0pF starting capacitance and the 900 Q-factor against circuit impedance matching requirements. Consider the operating temperature range of -55°C to +125°C for environmental compatibility.

Part Context

This component belongs to the GC15000 series of frequency-linear tuning varactors manufactured by Microsemi, now part of Microchip Technology. The series includes models ranging from GC15001 to GC15013, offering various capacitance values while maintaining consistent electrical characteristics such as sensitivity and breakdown voltage profiles across the lineup.

Replacement Considerations

Direct substitutes within the same family include GC15007-00 and GC15009-00, which share identical sensitivity and breakdown voltage but differ in capacitance values. Verify that any replacement maintains the required 13:1 tuning ratio and Q-factor specifications for the specific circuit topology.