The SiT7202 from SiTime is a Commercial-Off-The-Shelf (COTS) MEMS Temperature Controlled Crystal Oscillator (TCXO) that operates from 60 to 220 MHz. This TCXO’s design eliminates the need for frequency multipliers and offers excellent dynamic stability under airflow, fast temperature ramp, and vibration-prone environments. It ensures no activity dips or micro-jumps and is resilient to board bending. This MEMS TCXO also eliminates the frequency shifts caused by board noise and does not require a data converter. It provides LVCMOS or Clipped Sinewave output waveforms with a phase noise of -143 dBc/Hz (at 10 kHz offset) and a frequency stability of ±0.1/±0.2/±0.25 ppm.
This SiT7202 has an excellent Allan deviation of 1 x 10-11 to reduce the error rate in processing signals with long integration time such as encryption signals. It has a phase jitter of ±110 fs and a g-sensitivity of 0.01 ppb/g. This oscillator can digitally tune the frequency with a resolution of 5 x 10-14 using I2C or SPI interfaces. It requires a DC supply from 1.8 to 3.3 V and uses on-chip regulators, that eliminate the need for external LDOs simplifying the bill of materials (BOM).
This SiT7202 is available in a ceramic surface-mount package that measures 5.0 x 3.5 mm and is ideal for SATCOM terminals, manpack radios, radar, GPS/GNSS modules, avionics, and other ruggedized applications.
