This document describes the features and characteristics of the 6-output clock generator with integrated 2.0 GHz VCO AD9518-3 Rev. 0. It includes low phase noise, phase-locked loop, adjustable VCO frequency range, reference input monitoring capability, auto and manual reference switchover modes, and the ability to accept reference frequencies up to 250 MHz.
The AD9518-3 provides a multi‑output clock distribution function with sub‑picosecond jitter performance. It includes an on‑chip PLL and VCO that tunes from 1.75 GHz to 2.25 GHz, and can also accept an external VCO/VCXO up to 2.4 GHz. The device operates from a single 3.3 V supply and is specified for industrial temperature range –40 °C to +85 °C.
Key features include six LVPECL outputs (three pairs) with programmable dividers and coarse phase delay, additive output jitter of 225 fs rms, channel‑to‑channel skew under 10 ps, and a serial control port for configuration. Detailed specifications cover power supply requirements, PLL characteristics, clock input/output parameters, timing characteristics, and noise performance.
| LVPECL Output Maximum Frequency | 2950 MHz |
|---|---|
| On‑chip VCO Frequency Range | 1.75 GHz – 2.25 GHz |
| Reference Input Frequency Range | 0 – 250 MHz |
| Supply Voltage (Vs) Typical | 3.3 V (+5 %) |
| Phase Noise @ 100 kHz Offset | ‑108 dBc/Hz |
| Additive Output Jitter | 225 fs rms |
The device provides an additive output jitter of 225 fs rms.
It operates from a single 3.3 V supply (typical 3.3 V ±5 %).
The on‑chip VCO tunes from 1.75 GHz to 2.25 GHz.
It has six LVPECL outputs arranged in three pairs.