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Product Detailed Parameters
- Description：SI TVAR HERMETIC PILL
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Capacitance @ Vr, F：4.7pF @ 4V, 1MHz
- Capacitance Ratio：3.9
- Capacitance Ratio Condition：C0/C30
- Voltage - Peak Reverse (Max)：30 V
- Diode Type：Single
- Q @ Vr, F：2600 @ 4V, 50MHz
- Operating Temperature：-55°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：2-SMD, No Lead
- Supplier Device Package：-
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Overview
The GC1509-79 is a silicon abrupt junction tuning varactor from the GC1500 series, designed for VHF to Ku Band applications. It features a minimum breakdown voltage of 30V at 10 uA and a maximum leakage current of 0.02 uA at 25 Volts and 25°C. The nominal capacitance (CT) is 4.7 pF with a tolerance of ±10%. At -4V reverse bias and 50 MHz, it achieves a minimum quality factor of 2600 and a minimum capacitance ratio of 3.9. The device operates within a temperature range of -55°C to +125°C.
Feature Summary
- High Q factor and low series resistance for efficient signal tuning
- Abrupt junction design optimized for low phase noise performance
- RoHS compliant construction with gold-plated terminations
Applications
- Low phase noise voltage controlled oscillators
- Low loss voltage variable filters
- Phase shifters in RF circuits
Procurement Notes
Verify the specific suffix designation against official Microchip or Microsemi documentation to confirm package style and terminal finish requirements. Ensure ordering specifications align with the exact model number variant required for your circuit design.
Selection Notes
Select this component when high Q and low Rs are critical for narrow to moderate bandwidth tuning. Consider the 4.7 pF nominal capacitance and 30V breakdown rating to ensure compatibility with the target frequency band and voltage constraints.
Part Context
Part of the GC1500 series of 30 Volt Abrupt Junction Tuning Varactors manufactured by Microsemi/Microchip Technology. These devices are engineered for microwave control applications requiring precise capacitance variation under reverse bias conditions.
Replacement Considerations
Consult factory documentation for alternative case styles or custom mechanical configurations. Verify electrical equivalence if substituting with other models from the GC1500 series based on required capacitance and Q factor values.
FAQ
What is the standard terminal finish for the GC1509?
The standard terminal finish is gold plated.
How is the Quality Factor (Q) calculated for this device?
Q is calculated using the formula Q = 1 / (4 * pi * f * Cj * Rs), where Rs is measured at 1 GHz.
Does the listed capacitance value include package capacitance?
Yes, all specified capacitance values include a package capacitance of 0.18 pF.
