GENERAL DESCRIPTION

The AD9516-21 provides a multi-output clock distribution function with subpicosecond jitter performance, along with an on-chip PLL and VCO. The on-chip VCO tunes from 2.05 GHz to 2.33 GHz. Optionally, an external VCO/VCXO of up to 2.4 GHz can be used.

FEATURES

Low phase noise, phase-locked loop (PLL)

On-chip VCO tunes from 2.05 GHz to 2.33 GHz

External VCO/VCXO to 2.4 GHz optional

1 differential or 2 single-ended reference inputs

Reference monitoring capability

Automatic revertive and manual reference

switchover/holdover modes

Accepts LVPECL, LVDS, or CMOS references to 250 MHz

Programmable delays in path to PFD

Digital or analog lock detect, selectable

6 pairs of 1.6 GHz LVPECL outputs

Each output pair shares a 1-to-32 divider with coarse

phase delay

Additive output jitter: 225 fs rms

Channel-to-channel skew paired outputs of <10 ps

4 pairs of 800 MHz LVDS clock outputs

Each output pair shares two cascaded 1-to-32 dividers

with coarse phase delay

Additive output jitter: 275 fs rms

Fine delay adjust (Δt) on each LVDS output

Each LVDS output can be reconfigured as two 250 MHz

CMOS outputs

Automatic synchronization of all outputs on power-up

Manual output synchronization available

64-lead LFCSP

APPLICATIONS

Low jitter, low phase noise clock distribution

10/40/100 Gb/sec networking line cards, including SONET,

Synchronous Ethernet, OTU2/3/4

Forward error correction (G.710)

Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs

High performance wireless transceivers

ATE and high performance instrumentation