The SiT5146 from SiTime is a MEMS Super-TCXO that operates from 1 to 60 MHz. It has a frequency stability of ±0.5 to ±2.5 ppm and an acceleration sensitivity of 0.004 ppb/g. The oscillator has a 1 Hz step size and provides an LVCMOS or clipped sinewave output. It requires a DC supply voltage of 2.5 V/2.8 V/3.0 V/3.3 V and consumes less than 57 mA of current.
The SiT5146 leverages SiTime’s unique DualMEMS™ temperature sensing and TurboCompensation™ technologies to deliver the best dynamic performance for timing stability in the presence of environmental stressors due to air flow, temperature perturbation, vibration, shock, and electromagnetic interference. These features make the SiT5146 suitable for airborne and terrestrial applications that operate in extremely cold environments. It has an operating temperature from -40°C to +105°C. The oscillator also integrates multiple on-chip regulators to filter power supply noise, eliminating the need for a dedicated external LDO.
The SiT5146 can be factory programmed for any combination of frequency, stability, voltage, and pull range which enables designers to optimize clock configurations while eliminating long lead times and customization costs associated with quartz devices where each frequency is custom built.
The oscillator is available in a surface-mount package that measures 5.0 x 3.2 mm and is suitable for use in ballistics, missiles, munitions, military portable radios, ruggedized communications networks, precision GNSS systems, SATCOM, transponders, military, defense, space, and avionics systems.
