These ruggedised devices are engineered to deliver high performance in extreme conditions in aerospace-defence applications such as Positioning, Navigation and Timing (PNT), tactical communications, network synchronisation and surveillance.
The devices include the Endura ultra-stable Super-TCXO and the Endura low-jitter differential oscillator. Both families deliver 10x better environmental resilience. In addition, the Endura Super-TCXO family delivers up to 5x better stability, while the differential oscillator family delivers the best jitter.
SiTime’s MEMS, analogue and systems technologies have enabled many features that simplify design. For example, frequencies are programmable up to 6 decimal places of accuracy and ensure that the designer can select the exact frequency they want, to enhance system performance. With a frequency stability specification as low as ±10 ppb, designers can replace unreliable, power-hungry, large OCXOs with easy-to-use Super-TCXOs.
With an industry-leading power-supply noise rejection (PSNR) specification, these devices are very resistant to power supply noise, which is a common problem in the dense electrical environments of aerospace-defence electronics.
Key specifications of the Endura SiT5541 Ultra-stable Super-TCXOs include:
- 1 to 60MHz
- -40°C to +105°C operating temperature range, enables use in extreme temperatures
- ±10 ppb frequency stability over the full temperature range, highest amongst TCXOs, and able to replace more expensive, power-hungry, and less-reliable OCXOs
- Industry-leading 0.01 ppb/g g-sensitivity per MIL-PRF-55310
- 110 mW (typ.) power consumption, 2 to 10 times lower than ±10 ppb OCXOs
- ±0.5 ppb/°C dF/dT (frequency slope), resistant to thermal shock and airflow
- ±300 ppb 20-year aging at 85°C, eliminates expensive in-factory calibration that is required with less stable devices
- Small 7.0 mm x 5.0 mm ceramic package, insensitive to board bending stress, reducing board layout constraints.
Key specifications of the Endura SiT9551/SiT9356/SiT9357 Ultra-low-jitter Differential Oscillators:
- SiT9551, 15 different frequencies from 25 to 644.5 MHz, 70 fs RMS typical IPJ (integrated phase jitter, 12 kHz to 20 MHz integration range)
- SiT9346, 1 to 220 MHz frequency range, 150 fs RMS typical IPJ
- SiT9347, 220 to 920 MHz frequency range, 150 fs RMS typical IPJ
- 9 fs/mV power supply noise rejection (PSNR) ensures peak performance in the presence of power-supply noise, which is a common issue in dense aerospace-defence electronics
- -55°C to +125°C operating temperature range, enables use in extreme temperatures
- 04 ppb/g g-sensitivity per MIL-PRF-55310
- ±20 to ±50 ppm frequency stability over the full temperature range
- 26 mA no load current (typ.) with LVDS, 1.8V, 2.5V or 3.3V supply voltage
- Available in 2016, 2520 and 3225 QFN packages.
