The SiT7112 from SiTime is an Oven Controlled Crystal Oscillator (OCXO) that operates from 60 to 220 MHz. It produces an LVCMOS or clipped sinewave output and has a frequency stability of ±1 ppb (from -40°C to + 95°C). This OCXO leverages SiTime’s unique temperature sensing technology and advanced CMOS design to deliver excellent stability in extreme environments. It has less than 3.0 µs time error after 12 hrs without GPS synchronization. This oscillator is up to 70x resilient against g-sensitivity compared to vibration-rated quartz OCXOs and has a shock survivability of up to 20,000 g. It eliminates the need for a dedicated LDO and is optimized for excellent balance between EMI and jitter.
The SiT7112 requires a DC supply of 2.5, 2.8, or 3.3 V and consumes 460 mW (3.3 V) of power. This radio can be controlled via I2C and SPI interfaces. It is available in a robust package that measures 9.0 x 7.0 x 3.6 mm and is ideal for assured Positioning Navigation Timing (PNT), GNSS receivers, guidance systems, data communication systems, satcom terminal, radar, manpack & airborne radios and vehicle communication holdover and IEEE 1588 synchronization applications.
