With growing demand for high speed data transmission IQD is introducing at Electronica the new IQXV-80 and IQXV-81 series LVPECL/LVDS Voltage Controlled Crystal Oscillators (VCXOs) to their range. Low-Voltage Positive Emitter-Coupled Logic (LVPECL) outputs are typically chosen for their compatibility with high-speed ICs whilst Low Voltage Differential Signalling (LVDS) is similar but with lower power consumption. Intended for applications such as 10G & 40G Ethernet, SDH/SONET, WiMax, WLAN and Digital Imaging, both new models are available in a wide frequency range from 40 to 170 MHz.
Packaged in 3.2 × 2.5 mm industry standard 6-pad ceramic package, with a hermetically sealed metal lid to reduce EMI radiation. The IQXV-80 offers an LVPECL output while the IQXV-81 offers LVDS. Both series operate from a 3.3 V power source and are available with stabilities of ±25 ppm or ±50 ppm over an operating temperature range of –40 to 85 degrees C. In either case the frequency can be adjusted externally by the application of a control voltage (1.65 V±1.5 V) which can pull the output frequency by a minimum of ±80 ppm. This allows for absolute frequency adjustment and a correction for crystal ageing.
Both variants offer tri-state capability which can aid the testing and isolation of the circuit during alignment and upgrading. Phase jitter is extremely low for devices of this nature at less than 1 ps RMS (12 kHz to 20 MHz). The IQXV-80 and IQXV-81 are available in bulk pack for prototyping and tape & reel for volume production.
