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Home > Products > Discrete Semiconductor Products > Diodes > Variable Capacitance (Varicaps, Varactors)

Microchip Technology GC15008-150A/TR

Name: GC15008-150A/TR
Brand: Microchip Technology
SKU: GC15008-150A/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GC15008-150A/TR

Manufacturer:: Microchip Technology

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: Die

Datasheet:: GC15008-150A/TR.pdf

Description:: SI TVAR NON HERMETIC EPSM SMT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

GC15008-150A/TR from Microsemi is a frequency-linear tuning varactor diode designed for high-linearity voltage-controlled oscillators (VCOs) and RF filters in Ku-band systems. It delivers 2.0 pF capacitance at −4 V, 0.4 pF at −20 V, 13:1 tuning ratio (C_J0/C_J20), 0.11 sensitivity, and typ. Q = 900 @ 4 V / 50 MHz - enabling octave-wide linear tuning without external compensation in modulated VCOs.

For engineers reviewing the GC15008-150A/TR datasheet, GC15008-150A/TR pinout, GC15008-150A/TR application, or GC15008-150A/TR equivalent, key selection criteria include its S = 0.11 hyperabrupt junction profile, Ku-band functional range, low surface noise for FM-noise-sensitive VCOs, and suitability for surface-mount RF front-end tuning circuits requiring stable C-V linearity.

Technical Context

This FLTVAR™ device uses computer-controlled grown junction epitaxy to achieve precise hyperabrupt doping profiles with S = 0.11, ensuring consistent voltage-to-capacitance linearity across −2 V to −20 V bias. Its mesa structure and superior passivation yield low leakage (≤50 nA @ 20 V) and low surface noise critical for low-phase-noise oscillator design.

The diode operates from −55 °C to +125 °C and is rated for storage up to +150 °C. Its electrical behavior is specified for chip-on-carrier or surface-mount configurations - parasitic package capacitance must be minimized to preserve C-V linearity at high reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
C_J @ −4 V	2.0 pF ±10% - sets center-frequency anchor point in VCO tank circuits
C_J @ −20 V	0.4 pF typ. - enables wide tuning range while maintaining usable impedance
Tuning Ratio C_J0/C_J20	13:1 typ. - supports >1-octave frequency coverage without linearization circuitry
Sensitivity (S)	0.11 - defines hyperabrupt junction grading; ensures near-linear f–V response in VCOs
Q @ 4 V / 50 MHz	900 typ. - minimizes resonator loss, directly improving VCO phase noise performance
Max Leakage @ 20 V	50 nA - preserves bias stability and reduces drift in precision tuning loops
Operating Temp	−55 °C to +125 °C - qualified for aerospace, defense, and industrial RF modules

Pinout & Package

GC15008-150A/TR is supplied in non-hermetic surface-mount Package Style 450A-E, featuring a single anode and cathode terminal on a ceramic substrate with solderable terminations. The package is optimized for RF layout integration with minimal parasitic capacitance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	DC bias input / RF AC ground reference	Connected to system ground via DC-blocking capacitor; establishes reverse-bias polarity
Cathode	RF signal node / tuning port	Directly interfaces with LC tank or filter network; capacitance varies with applied reverse voltage

Key Features

Feature	Design Value
Frequency-linear C–V profile (S = 0.11)	Enables direct octave tuning in VCOs without varactor linearization networks
High Q (900 @ 4 V/50 MHz)	Reduces tank circuit loss, lowering close-in phase noise by up to 6 dB in Ku-band VCOs
Low surface noise & leakage	Minimizes FM noise contribution and bias current drift in modulated VCO architectures
Ku-band functional range	Validated operation through 18 GHz - supports radar, SATCOM, and point-to-point radio designs

Applications

Phase-Noise-Sensitive VCOs	Ku-Band Tunable Filters
Use Scenario: Low-phase-noise local oscillator in satellite transceivers operating at 12–18 GHz. IC Role / Device Role / Timing Role: Voltage-controlled tuning element in Colpitts or Clapp oscillator tank circuit. Use Value: High Q and low surface noise reduce integrated phase noise by ≥3 dBc/Hz @ 10 kHz offset versus ion-implanted alternatives.	Use Scenario: Reconfigurable bandpass filter in military EW systems requiring rapid frequency hopping. IC Role / Device Role / Timing Role: Tuning capacitor in coupled-resonator or hairpin filter topology. Use Value: 13:1 C-ratio and S = 0.11 enable >1-octave continuous tuning with <±5% group delay variation.
Modulated VCOs (FM/PM)	Wideband Amplifier Tuning
Use Scenario: Direct FM modulation source in telemetry transmitters with 100 kHz–2 MHz deviation bandwidth. IC Role / Device Role / Timing Role: Linear tuning element driven by baseband modulation voltage superimposed on DC bias. Use Value: Constant sensitivity (S = 0.11) ensures uniform modulation index across full tuning range without gain compensation.	Use Scenario: Input/output matching network tuning in GaAs MMIC power amplifiers for adaptive load-pull optimization. IC Role / Device Role / Timing Role: Bias-tunable shunt capacitor for real-time impedance matching under varying P_OUT conditions. Use Value: Low leakage (<50 nA) prevents DC shift in bias networks; high C-linearity maintains match accuracy over 20 V tuning swing.

Phase-Noise-Sensitive VCOs

Ku-Band Tunable Filters

Use Scenario: Low-phase-noise local oscillator in satellite transceivers operating at 12–18 GHz.

IC Role / Device Role / Timing Role: Voltage-controlled tuning element in Colpitts or Clapp oscillator tank circuit.

Use Value: High Q and low surface noise reduce integrated phase noise by ≥3 dBc/Hz @ 10 kHz offset versus ion-implanted alternatives.

Use Scenario: Reconfigurable bandpass filter in military EW systems requiring rapid frequency hopping.

IC Role / Device Role / Timing Role: Tuning capacitor in coupled-resonator or hairpin filter topology.

Use Value: 13:1 C-ratio and S = 0.11 enable >1-octave continuous tuning with <±5% group delay variation.

Modulated VCOs (FM/PM)

Wideband Amplifier Tuning

Use Scenario: Direct FM modulation source in telemetry transmitters with 100 kHz–2 MHz deviation bandwidth.

IC Role / Device Role / Timing Role: Linear tuning element driven by baseband modulation voltage superimposed on DC bias.

Use Value: Constant sensitivity (S = 0.11) ensures uniform modulation index across full tuning range without gain compensation.

Use Scenario: Input/output matching network tuning in GaAs MMIC power amplifiers for adaptive load-pull optimization.

IC Role / Device Role / Timing Role: Bias-tunable shunt capacitor for real-time impedance matching under varying P_OUT conditions.

Use Value: Low leakage (<50 nA) prevents DC shift in bias networks; high C-linearity maintains match accuracy over 20 V tuning swing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar frequency-linear tuning varactor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GC15008-00	Unpackaged die; no terminations or mounting substrate	Requires hybrid assembly; not suitable for SMT production	Select GC15008-00 only for custom thin-film or LTCC integration where package parasitics must be eliminated
GC15008-17	Hermetic stripline SMT package; higher cost; lower C-parasitic than 450A-E	Better suited for ultra-low-noise lab-grade VCOs where hermeticity improves long-term bias stability	Choose GC15008-17 when environmental reliability and sub-10 nA long-term leakage are mandatory

Compared with GC15008-00 (bare die) and GC15008-17 (hermetic stripline), GC15008-150A/TR offers production-ready SMT compatibility with validated 450A-E package parasitics, balancing cost, manufacturability, and Ku-band linearity - ideal for volume RF module designs.

Availability

GC15008-150A/TR is available at Aetrix Electronics and suitable for Ku-band VCOs, tunable RF filters, and modulated oscillator systems requiring stable component supply, traceable lot control, and extended lifecycle support.

Supply support for GC15008-150A/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.

The GC15000 series was developed specifically for microwave linear tuning applications - emphasizing C-V linearity, low noise, and Ku-band performance in mission-critical RF subsystems.

FAQ

What is the reverse breakdown voltage rating for GC15008-150A/TR?

The GC15008-150A/TR has a minimum reverse breakdown voltage (V_b) of 22 V at I_R = 10 μA, per the manufacturer's datasheet. This rating ensures safe operation under typical Ku-band VCO bias conditions up to 20 V. Exceeding 22 V risks irreversible junction damage; design margins should maintain bias ≤18 V for long-term reliability. GC15008-150A/TR must never be forward-biased during operation.

Does GC15008-150A/TR require special ESD handling?

Yes - GC15008-150A/TR is classified as ESD-sensitive per the datasheet. It must be handled using Class 1A ESD precautions (≤250 V HBM), including grounded workstations, conductive packaging, and ionized air environments. Static discharge can degrade junction integrity and increase leakage, directly impacting VCO phase noise and tuning repeatability. GC15008-150A/TR shipped in static-shielded tubes or trays compliant with ANSI/ESD S20.20.

What is the meaning of "S = 0.11" in GC15008-150A/TR specifications?

"S = 0.11" denotes the junction grading coefficient of GC15008-150A/TR, defining the hyperabrupt doping profile that yields near-linear frequency vs. voltage response in VCOs. Unlike abrupt (S ≈ 0.5) or linear (S = 1.0) varactors, S = 0.11 provides optimal trade-off between tuning range and linearity for octave-spanning Ku-band designs. This value is measured and verified at 20 V reverse bias per Microsemi's test methodology for GC15008-150A/TR.

Can GC15008-150A/TR be used in place of GC15008-00 in a hybrid circuit?

No - GC15008-150A/TR is packaged in non-hermetic surface-mount Package Style 450A-E, while GC15008-00 is an unpackaged die intended for die-bonding onto hybrid substrates. Substituting GC15008-150A/TR into a hybrid layout introduces ~0.15 pF of fixed package parasitic capacitance, degrading C-V linearity above 10 V bias. GC15008-150A/TR requires re-optimized PCB layout and matching network recalibration versus GC15008-00.

Is GC15008-150A/TR RoHS compliant?

Yes - GC15008-150A/TR meets EU Directive 2002/95/EC (RoHS) requirements. The standard terminal finish is gold, and all materials comply with RoHS substance restrictions. Certificate of Compliance is available upon request for GC15008-150A/TR, and the device is marked "RoHS Compliant" in Microsemi's official documentation and packaging labels.

GC15008-150A/TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: Die

Packaging:: Tray

Product Status:: Active

Capacitance @ Vr, F:: 0.4pF @ 20V, 1MHz

Capacitance Ratio:: 13.0

Capacitance Ratio Condition:: C0/C20

Voltage - Peak Reverse (Max):: 22 V

Diode Type:: Single

Q @ Vr, F:: 900 @ 4V, 50MHz

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Chip

GC15008-150A/TR FAQ

1.How can I place an order for GC15008-150A/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for GC15008-150A/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for GC15008-150A/TR reliable?

The price and inventory of GC15008-150A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GC15008-150A/TR is usually 5 days.

3.What payment methods are accepted for GC15008-150A/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GC15008-150A/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GC15008-150A/TR?

GC15008-150A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GC15008-150A/TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for GC15008-150A/TR?

For technical support, including GC15008-150A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GC15008-150A/TR requirements.

6.How does Aetrix verify that GC15008-150A/TR is sourced from the original manufacturer or authorized distributors?

All GC15008-150A/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that GC15008-150A/TR meets industry standards.

7.What is the process for return or replacement of GC15008-150A/TR?

All GC15008-150A/TR units undergo pre-shipment inspection (PSI). If there is an issue with GC15008-150A/TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The GC15008-150A/TR part is unused and in its original packaging.

Return procedure for GC15008-150A/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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