I. Stringent Requirements of GNSS Modules for Clock Sources
GNSS (Global Navigation Satellite System) calculates positioning through multi-satellite signal synchronization, with accuracy directly dependent on nanosecond-level timing precision. For systems like BeiDou and GPS, positioning error follows the formula: Positioning Error = Time Deviation × Speed of Light—where a 1ns timing error results in ~30cm positioning deviation. Thus, GNSS modules demand clock sources with:
•Ultra-high frequency stability: Frequency deviation ≤±0.5ppm (1ppm ≈ 1-second error per 27.8 hours) .
•Wide temperature adaptability: Stable output across -40℃~+85℃ environments.
•Low phase noise: Minimizes signal jitter interference for carrier phase measurements.
•Fast startup: Reduces cold-start time (e.g., ≤2ms) to improve user experience .
II. Advantages of HOSONIC G22TC26 26MHz TCXO
1. Core Electrical Parameters Aligned with GNSS Standards
Parameter | Specification | Significance for GNSS Modules |
Nominal Frequency | 26.000000MHz | Standard input for GNSS chips (e.g., u-blox, ZKW) |
Frequency Stability | ±0.5ppm (-40℃~+85℃) | Ensures <1.5ns time deviation (<50cm positioning) |
Phase Noise | -145dBc/Hz @10kHz offset | Enhances weak-signal tracking in urban canyons |
Startup Time | ≤2ms (90% output voltage) | Accelerates TTFF (Time To First Fix) |
Voltage Range | 1.71V~3.47V | Compatible with low-power (1.8V) and standard modes |
2.Compact Design & Anti-Interference Features
•2520 package (2.5×2.0mm): Fits miniaturized GNSS modules (e.g., <10mm² automotive units) .
•Clipped sine wave output (DC-coupled): Directly interfaces with GNSS chips, eliminating level-shifting circuits .
III. Application Scenarios & Integration Solutions
1.Automotive Navigation & Autonomous Driving
•Challenge: Extreme temperature swings (-40℃~+85℃) and vibration (10Hz~2000Hz).
• Solution: Passes 20G vibration tests; enables <1m lane-level accuracy when paired with GNSS+IMU .
2. IoT Positioning Terminals
•Low power: 1.5mA operating current extends battery life for asset trackers.
•Integration: Compatible with compact GNSS modules (e.g., BoshiJie B1612-M) for smart
city/agriculture applications .
3.Industrial Surveying & Drones
•RTK support: -105dBc/Hz @100Hz phase noise enables centimeter-level precision.
•Storage resilience: -40℃~+85℃ storage range suits high/low-altitude drone deployments .
Conclusion
The HOSONIC G22TC26 TCXO meets GNSS timing demands with precision (±0.5ppm), wide-temperature operation, and low noise , while its compact design reduces system footprint. As BeiDou-3 global coverage and autonomous driving evolve, such localized high-performance components will further propel GNSS innovation.
About Mandu Technology
Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.
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