CMOS VCXO Oscillators
Your Professional CMOS VCXO Oscillators Supplier
Suzhou Hangjing Elec & Tech Co., Ltd., founded in 2014, is a technology-driven small and medium-sized enterprise (SME) specializing in the full-spectrum R&D, design, production, and sales of quartz frequency control components. Rooted in a professional team and advanced manufacturing expertise, the company has developed a robust product portfolio encompassing quartz crystals, crystal oscillators, TCXO, VCXO, OCXO, crystal filters-ranging from foundational components to tailored systems.
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Why choose us
Superior Quality
A precision supply chain ensuring consistent product quality;An ultra-low failure rate validated by rigorous testing;High-quality materials and advanced technology make the product more reliable.
Service Advantages
A customer-centric service framework (covering pre-sales consultation to post-sales support) that prioritizes rapid response. 24-hour online service, timely and fast quotation for you.
Sales Market
Our Products has expanded into key international regions including Europe, Southeast Asia, the Americas, Oceania, and other major markets. This global network enables the company to provide full support to leading electronics manufacturers around the world, while maintaining a strong focus on high-quality products.
Our Certificate
All our products have passedGB/T 19001 - 2016/ISO 9001:2015 Quality Management System Standard, This demonstrates that they meet international standards for quality, safety, and performance.
Low Phase Noise VCXO Oscillator 7 X 5
The low-phase-noise VCXO oscillator (7×5 package) is a voltage-controlled crystal oscillator housed in a compact 7mm×5mm package. Its core feature is frequency regulation through voltage control while offering extremely low phase noise performance. This balance of high stability, low jitter, and low noise is achieved in high-frequency applications, making it a core clock source device in the communications, video, test, and industrial fields.
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PARAMETER |
SUPPLY VOLTAGE |
REMARKS |
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1.8V |
2.5V |
3.3V |
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Frequency range |
15 ~ 250MHz |
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Frequency stability |
±20ppm / ±25ppm / ±30ppm / ±50ppm |
See note below |
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Operating temperature range |
-10 to +60°C / -20 to +70°C / -40 to +85°C |
Options available |
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Aging first year |
±3.0ppm |
@+25°C |
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Frequency pulling range |
±50ppm ~ ±250ppm |
Depending on frequency |
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Supply current |
--- |
--- |
10mA |
1.5~15MHz @15pF |
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40mA |
50mA |
20~30mA |
≥15~80MHz @15pF |
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70mA |
80mA |
40~90mA |
≥80MHz @15pF |
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Output waveform and load |
LVCMOS 15pF |
30pF optional |
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Output voltage level HIGH |
1.62V |
2.25V |
2.97V |
Minimum |
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Output voltage level LOW |
0.18V |
0.25V |
0.33V |
Maximum |
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Rise and Fall times |
4ns |
4ns |
5ns |
1~50MHz @10~90% of Vcc |
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2ns |
2ns |
3ns |
≥50MHz @10~90% of Vcc |
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Symmetry (duty cycle) |
40~60% or 45~55% |
@ 50%Vcc |
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Phase jitter RMS |
<1ps |
12kHz≤Fj≤20MHz |
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Extremely Low Phase Noise
Phase noise is a measure of the phase jitter of a frequency signal, measured in dBc/Hz (noise power per Hz bandwidth relative to carrier power). Low phase noise means a cleaner signal spectrum, less interference with adjacent signals, and lower system bit error rates.
Flexibility
VCXOs achieve frequency pulling using a varactor diode, adjusting the output frequency via an external control voltage (typically 0.5V to 3.3V). The pull range indicates the maximum adjustable frequency deviation.
Ultra-Low Jitter
Jitter is the timing uncertainty of a clock signal edge, measured in picoseconds (ps). Low jitter ensures system timing accuracy and reduces bit error rates.
Temperature Stability
Frequency deviation can be controlled within ±25ppm under extreme temperatures, making it compatible with industrial-grade controller chips such as TI Sitara and STM32H7.
Type of Low Phase Noise VCXO Oscillator 7 X 5
Quartz Crystal VCXOs
Using a quartz crystal as a resonator, they leverage its piezoelectric effect and stable mechanical vibration properties to generate frequencies. They are used in applications such as 5G base stations, optical network equipment, and satellite navigation, where frequency purity is extremely critical.
MEMS (Micro-Electro-Mechanical System) VCXOs
Replacing quartz crystals with MEMS resonators (such as silicon-based beam structures), they achieve frequency generation through capacitive or piezoresistive sensing. They are compact and have lower power consumption: typically less than 10mW, making them suitable for portable devices.
5G base stations
Serve as a reference signal source for digital modulation circuits, ensuring the stability of high-speed data transmission.
Optical network equipment
Provides a low-jitter clock source in 25G/100G network interfaces to reduce signal degradation.
Video and broadcasting
Outputs reference frequencies such as 148.5MHz and 297MHz to match video pixel clocks (e.g., 27MHz at 1080p). Phase noise must be ≤-115dBc/Hz at a 10kHz frequency offset to avoid image stuttering or tearing.
Test and measurement
Provides a high-precision clock source to ensure accurate measurement results. In satellite navigation and flight control systems, it withstands extreme temperature environments and provides stable frequency control.
Industrial automation
Maintain stability within ±25ppm in high-temperature environments (-40°C to +85°C) and are compatible with industrial-grade control chips such as TI Sitara and STM32H7.
Precautions During Use of Low Phase Noise VCXO Oscillator 7 X 5
Voltage Range: Strictly adhere to the Vc range specified in the datasheet (e.g., 0.5V to 3.3V). Exceeding this range may cause frequency offset or damage.
Linearity Optimization: If high-precision control is required, add an op amp to buffer the Vc signal to reduce loading effects.
Noise Suppression: Route the Vc line away from high-speed signals and add ferrite beads for filtering.
Heat Dissipation Design: High-power VCXOs (e.g., >1W) require a heat sink or thermal pad to ensure the junction temperature is ≤85°C.
Temperature Compensation: If the ambient temperature fluctuates significantly, enable the TCXO function or connect an external temperature sensor for dynamic compensation.
Mounting Method: Avoid direct pressure on the top of the VCXO (which may damage the crystal). Socket or SMD soldering is recommended.
Vibration Isolation: For automotive or aerospace equipment, add shock-absorbing pads to reduce the impact of mechanical vibration on the frequency.
Maintenance and Testing
Regular Calibration
Frequency Calibration: At least once a year, use a frequency counter (such as the Agilent 53132A) to verify that the output frequency is within the nominal value ± the pull-up range.
Phase Noise Testing: Every two years, use a spectrum analyzer (such as the R&S FSWP) or a phase noise meter (such as the Keysight E5052B) to verify specifications.
Troubleshooting
No output: Check whether the power supply voltage and Vc are within the range and whether the soldering is loose.
Frequency Drift: Verify whether the temperature exceeds the limit or the pull-up voltage is abnormal.
Phase Noise Deterioration: Check for power supply noise, shielding failure, or strong interference sources nearby.
Storage Conditions
Temperature and Humidity: The storage environment should be controlled between -10°C and +60°C, with a humidity of ≤60% to prevent moisture absorption by the crystal and frequency drift.
Anti-Static: Wear an anti-static wrist strap during operation to prevent ESD damage to sensitive circuits.
Certificates
FAQ
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