What made you select the SiTime SiT7111 and SiT7112 OCXOs? How do they differentiate from other products?
I’m pleased to feature the SiTime SiT7111 and SiT7112 ruggedized Endura Epoch Oven Controlled Oscillators (OCXO) as one of our RFMW Expert Product Picks this year. These MEMS-based devices are designed to address the long-standing issues associated with quartz OCXOs, such as issues with performance under vibrations, size, and reliability. Utilizing SiTime’s proprietary temperature sensing technology and advanced CMOS design, they provide outstanding frequency stability under environmental stressors such as airflow, vibration, shock, EMI, and temperature perturbation.
These OCXOs offer significant improvements in size, weight, and power (SWaP), being up to 20 times smaller, up to 300 times lighter, and consuming up to 2 times less power. SiTime’s silicon manufacturing process guarantees the highest quality with shorter lead times, ensuring a robust supply chain.
The SiT7111 (10 to 60 MHz) and SiT7112 (60 to 220 MHz) OCXOs come in a compact surface mount package (9.0 mm x 7.0 mm x 3.6 mm) and provides ±1 ppb over-temperature stability from -40°C to 95°C, a g-sensitivity of 0.01 ppb/g, ±0.1 ppb daily aging and an Allan deviation of 5E-12. It features a frequency pull range of ±400 ppm via I2C or SPI with fine resolution as low as 0.05 ppt (5E-14). As a result, they can provide 24 holdover performance of less than 1.5 us time error with external aging compensation.
What are the key features and specifications of the SiT7111 and SiT7112 OCXOs?
- ±1 ppb temperature stability
- 5E-12 ADEV to 1,000 sec
- ±0.1 ppb daily aging
- 420 mW power steady state
- 20,000 g shock survivability
• 0.01 ppb/g acceleration sensitivity - Factory Programmable Frequency to 220 MHz
- Operating Temperature: -40 to 95°C
- Package: weight 0.35g, 7×9×3.6 mm
What are common markets and applications of the SiT7111 and SiT7112?
- Assured Positioning Navigation Timing (PNT)
- GNSS Receivers
- Guidance Systems
- Data Communication Systems
- Mounted and Airborne Radios
- SatCom Terminal
- Radar
- IEEE 1588 Synchronization
About Nick John
Nick John is Supplier Business Manager of Passive Divisions at RFMW. With 20 years of industry experience, Nick has worked in sales, account management, and distribution. Passionate about timing solutions, Nick enjoys the fast-paced environment of the electronics industry, aiding customer designs, and enhancing partnerships with leading suppliers.
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