IQXO-408 & IQXO-455 - IQD's Lowest Phase Noise SPXOs

As application requirements drive the need for high-speed data, more oscillator devices with ultra-low phase noise are required. This type of application is especially prevalent in today's connected world. Applications include fibre transceivers, gigabit Ethernet and 5G base stations.

These CMOS clock oscillators can perform with a close-in phase noise as low as -113 dBc/Hz @ 10 Hz and far-out phase noise as low as -175 dBc/Hz @ 100 kHz (3.3 V, 20 MHz, IQXO-408). The low phase noise oscillators are available at either 1.8 V, 2.5 V or 3.3 V with a phase jitter down to 40 fs RMS (over 12 kHz to 5 MHz).

Common applications include high data rate applications, IoT, 5G, PLL, frequency multiplier, clock recovery, gigabit Ethernet, fibre, studio grade and high-end consumer audio equipment.

Why Does Low Phase Noise Matter?

• Cleaner RF Performance: Low phase noise minimises spurs and sideband noise, improving SNR and reducing interference in RF and microwave systems
• Enables High Data Throughput: Essential for supporting high-order modulation (e.g. 256-QAM) in modern comms like 5G, Satcom, and fibre links
• Precision in Test & Measurement: Key for instruments like spectrum analysers and signal generators where low phase noise defines resolution and dynamic range
• Critical for Radar Accuracy: Low phase noise improves target detection, reduces jitter in pulse timing, and enhances Doppler performance
• Stable Frequency Reference: Vital for clocking ADCs, FPGAs, and timing distribution networks—ensuring synchronized, low-jitter system performance