AD9518-3ABCPZ Low Jitter Clock Generator with PLL and VCO 8 Configurable Outputs (LVPECL/LVDS/CMOS) Integer-N Frequency Synthesis For High-Speed ADC/DAC and FPGA Clocking

Features

Low phase noise, phase-locked loop (PLL)

On-chip Vco tunes from 1.75 GHz to 2.25 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

3 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

Automatic synchronization of all outputs on power-up

Manual output synchronization available

Available in a 48-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

Description

The AD9518-31 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 1.75 GHz to 2.25 GHz. Optionally, an external VCO/VCXO of up to 2.4 GHz can be used. The AD9518-3 emphasizes low jitter and phase noise to maximize data converter performance, and it can benefit other applications with demanding phase noise and jitter requirements. The AD9518-3 features six LVPECL outputs (in three pairs). The LVPECL outputs operate to 1.6 GHz. For applications that require additional outputs, a crystal reference input, zero-delay, or EEPROM for automatic configuration at startup, the AD9520 and AD9522 are available.In addition, the AD9516 and AD9517 are similar to the AD9518 but have a different combination of outputs. Each pair of outputs has dividers that allow both the divide ratio and coarse delay (or phase) to be set. The range of division for the LVPECL outputs is 1 to 32. The AD9518-3 is available in a 48-lead LFCSP and can be operated from a single 3.3 V supply. An external VCO, which requires an extended voltage range, can be accommodated by connecting the charge pump supply (VCP) to 5 V. A separate LVPECL power supply can be from 2.5 V to 3.3 V (nominal). The AD9518-3 is specified for operation over the industrial range of −40°C to +85°C.

INFORMATION

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