Microchip Technology GC15009-150A/TR

Overview

GC15009-150A/TR from Microsemi is a frequency-linear tuning varactor diode designed for wideband VCO and filter tuning in Ku-band RF systems. It delivers 5.0 pF capacitance at −4 V, 0.9 pF at −20 V, 13:1 tuning ratio (C_J0/C_J20), 0.11 sensitivity, and typical Q of 800 at 4 V / 50 MHz - enabling octave-range linear tuning without external compensation in high-frequency synthesizers.

For engineers reviewing the GC15009-150A/TR datasheet, GC15009-150A/TR pinout, GC15009-150A/TR application, or GC15009-150A/TR equivalent, this part supports low-phase-noise VCO design, Ku-band modulated oscillator implementation, and high-linearity RF filter tuning where bias-dependent capacitance stability and surface noise performance are critical.

Technical Context

This FLTVAR™ device uses computer-controlled grown junction epitaxy to achieve precise C–V linearity across its tuning range. Its 0.11 sensitivity and 13:1 C_J0/C_J20 ratio are optimized for 20 V bias operation, supporting stable frequency modulation in VCOs up to 18 GHz.

The diode operates from −55 °C to +125 °C with ≤50 nA leakage at 20 V and exhibits low surface noise due to superior silicon passivation - directly contributing to reduced FM noise in oscillator applications and consistent modulation response in broadband modulators.

Key Specifications

Pinout & Package

GC15009-150A/TR is supplied in non-hermetic surface-mount Package Style 450A-E, featuring an anode and cathode terminal on a ceramic substrate with solderable terminations. The package is optimized for RF microstrip integration and minimizes parasitic capacitance to preserve C–V linearity above 10 GHz.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Compared with GC15009-00 (bare die) and GC15009-17 (hermetic stripline), GC15009-150A/TR offers optimized RF performance in production SMT assembly - balancing Ku-band linearity, manufacturability, and cost for commercial satellite and test equipment applications.

Availability

GC15009-150A/TR is available at Aetrix Electronics and suitable for Ku-band VCO design, satellite LNB filter tuning, and RF test instrument development requiring stable component supply and traceable sourcing.

Supply support for GC15009-150A/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 frequency-linear tuning in microwave VCOs and filters - targeting applications demanding octave-range, low-noise, and bias-stable capacitance control through Ku band.

FAQ

What is the maximum reverse bias voltage for GC15009-150A/TR?

The absolute maximum reverse bias voltage for GC15009-150A/TR is 20 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks irreversible junction breakdown. For reliable long-term performance in VCO designs, Microsemi recommends limiting bias to ≤18 V with appropriate derating for temperature and process variation. GC15009-150A/TR must be operated in reverse bias only - forward conduction degrades linearity and increases noise.

Does GC15009-150A/TR require special handling due to ESD sensitivity?

Yes, GC15009-150A/TR is classified as ESD-sensitive per Microsemi documentation. It must be handled using Class 1A ESD precautions - including grounded workstations, ionized air, and static-dissipative packaging. The epitaxial mesa structure is particularly vulnerable to gate oxide damage from transient discharges below 250 V HBM. GC15009-150A/TR shipped by Aetrix Electronics complies with ANSI/ESD S20.20 requirements and includes conductive foam and shielding.

How does the 0.11 sensitivity value impact VCO design with GC15009-150A/TR?

The 0.11 sensitivity defines the linearity of the C–V curve under 20 V bias, meaning ∆C/∆V remains nearly constant across the tuning range. This allows direct voltage-to-frequency mapping in GC15009-150A/TR-based VCOs without active linearization circuits. In practice, it enables ±10 MHz/V tuning slope stability across 0–18 GHz, simplifying PLL loop filter design and improving modulation fidelity in FM systems using GC15009-150A/TR.

Is GC15009-150A/TR RoHS compliant?

Yes, GC15009-150A/TR meets RoHS Directive 2002/95/EC requirements. The standard terminal finish is gold, and all materials - including substrate, metallization, and molding compound - have been verified for restricted substance compliance. Aetrix Electronics provides full RoHS documentation and material declarations upon request for GC15009-150A/TR orders.

What is the typical Q factor of GC15009-150A/TR and where is it measured?

The typical Q factor of GC15009-150A/TR is 800, measured at 4 V reverse bias and 50 MHz according to the manufacturer's electrical parameters table. This value reflects series-equivalent quality factor under standard test conditions and correlates strongly with phase noise performance in VCO applications. At higher frequencies (e.g., 15 GHz), Q decreases due to skin effect and parasitics, but GC15009-150A/TR maintains usable linearity and noise performance through Ku band.