AD9518-1 is a 6-output clock generator with integrated 2.5GHz VCO, supporting 1 differential or 2 single-ended reference inputs, optional external VCO/VCXO to 2.4GHz, supporting automatic and manual reference switching/holdover modes, auto-recovery from holdover, supporting 250MHz reference, programmable delay to PFD, supporting digital or analog lock detection, 3 pairs of 1.6GHz LVPECL outputs, each pair shares 1 to 32 dividers with coarse phase delay, additive output jitter 225 fs rms, paired output channel-to-channel skew <10ps, automatic synchronization of all outputs on power-up, manual synchronization of outputs as needed, with serial control port, 48-lead LFCSP package.
The AD9518-1 is a 6‑output clock generator that integrates a 2.5 GHz VCO and offers low phase‑noise, low jitter performance for high‑speed data converters, wireless transceivers, and instrumentation. It supports both internal and external VCO/VCXO options, multiple reference inputs, and programmable delays and dividers for each output pair.
The device is supplied in a 48‑lead LFCSP package, operates from a single 3.3 V supply (with optional 5.5 V for external VCO), and is rated for industrial temperature range –40 °C to +85 °C. Detailed functional block diagrams, timing characteristics, and serial control port information are provided for system integration.
| VCO Frequency Range | 2.30 GHz – 2.65 GHz |
|---|---|
| Maximum Output Frequency (LVPECL) | 2.95 GHz |
| Phase Noise @ 1 MHz Offset (internal VCO) | -124 dBc/Hz |
| Additive Phase Noise @ 100 kHz Offset (distribution only) | -144 dBc/Hz |
| Supply Voltage (Vs) | 3.3 V ±5 % |
| Operating Temperature Range | –40 °C to +85 °C |
The on‑chip VCO tunes from 2.30 GHz to 2.65 GHz.
The AD9518‑1 provides six LVPECL outputs arranged in three pairs.
The device is specified for –40 °C to +85 °C operation.