An ultra stable temperature compensated crystal oscillator (TCXO) has been released by Precision Devices. The TS05 provides stability of only ±0.2ppm over an operating temperature range of -40°C to 85°C. When operating over a restricted temperature range of -10°C to 70°C, stability is even lower at ±0.1ppm. Stability is ±0.05ppm for supply voltage variations up to 5%, and for load variations up to 10%. With aging, the maximum change is only ±0.5ppm per year, to ensure reliable long-term performance.
The new oscillator has excellent phase noise characteristics. At a frequency of 26MHz, typical phase noise figures are -117dBc/Hz at an offset of 100Hz, -138dBc/Hz at an offset of 1kHz and -152dBc/Hz at an offset of 10kHz.
Targeted at femtocell and base station applications, the oscillator covers the frequency range from 10MHz to 52MHz.
The device operates from a 3V supply voltage, and draws 2mA current when generating a clipped sinewave output, and 4mA when generating a CMOS squarewave output.