Ultra-miniature VCXOs offer low phase noise

The Euroquartz G326 series of ultra-miniature voltage-controlled crystal oscillators (VCXOs) use fundamental mode crystals for superior phase-noise performance. Available in frequencies from 1.0 to 50 MHz, the VCXOs feature integrated phase jitter of 200 fs (typical) and suit a wide range of timing applications, including SONET, ATM, set-top boxes, MPEG, audio-video modulation, video game consoles, and HDTV, ONET, 10GbE, Fiber Channel, wireless repeaters, transponders, FPGAs, and data acquisition.

Unlike standard clock oscillators that have a fixed output frequency, the output of G326 VCXOs can be tuned 50 to 200 ppm up or down from the nominal frequency by varying a control voltage accessed via a pad on the component. Housed in a low mass, ultra-miniature 6-pad SMD package measuring 3.2 x 2.5 x 1.0mm, the VCXOs are available in both commercial (−10 to 70°C) and industrial (−40 to 85°C), versions, in 1.8, 2.5, 3.3, or 5-Vdc supply versions, and offer CMOS (15 pF) or TTL (two gates) outputs. Additional specifications include rise/fall times of 6 ns max, duty cycle of 50% ±10% (±5% available to order), start-up time within 10 ms, current consumption of 10 to 45 mA dependent on frequency, and linearity of 6% typical, 10% max.