GENERAL DESCRIPTION

The AD9520-11 provides a multioutput clock distribution function with subpicosecond jitter performance, along with an on-chip PLL and VCO. The on-chip VCO tunes from 2.27 GHz to 2.65 GHz. An external 3.3 V/5 V VCO/VCXO of up to 2.4 GHz can also be used.

The AD9520 serial interface supports both SPI and I2C? ports. An in-package EEPROM can be programmed through the serial interface and store user-defined register settings for power-up and chip reset.

The AD9520 features 12 LVPECL outputs in four groups. Any of the 1.6 GHz LVPECL outputs can be reconfigured as two 250 MHz CMOS outputs.

FEATURES

Low phase noise, phase-locked loop (PLL)

On-chip VCO tunes from 2.27 GHz to 2.65 GHz

Supports external 3.3 V/5 V VCO/VCXO to 2.4 GHz

1 differential or 2 single-ended reference inputs

Accepts CMOS, LVDS, or LVPECL references to 250 MHz

Accepts 16.67 MHz to 33.3 MHz crystal for reference input

Optional reference clock doubler

Reference monitoring capability

Auto and manual reference switchover/holdover modes, with selectable revertive/nonrevertive switching

Glitch-free switchover between references

Automatic recovery from holdover

Digital or analog lock detect, selectable

Optional zero delay operation

Twelve 1.6 GHz LVPECL outputs divided into 4 groups

Each group of 3 has a 1-to-32 divider with phase delay

Additive output jitter as low as 225 fs rms

Channel-to-channel skew grouped outputs <16 ps

Each LVPECL output can be configured as 2 CMOS outputs (for fOUT ≤ 250 MHz)

Automatic synchronization of all outputs on power-up

Manual synchronization of outputs as needed

SPI- and I2C-compatible serial control port

64-lead LFCSP

Nonvolatile EEPROM stores configuration settings

APPLICATIONS

Low jitter, low phase noise clock distribution

Clock generation and translation for SONET, 10Ge, 10G FC, and other 10 Gbps protocols

Forward error correction (G.710)

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

High performance wireless transceivers

ATE and high performance instrumentation

Broadband infrastructures

AD9520-1屬于集成電路（IC） > 時鐘發(fā)生器，PLL，頻率合成器。亞德諾半導體技術有限公司制造生產的AD9520-1時鐘發(fā)生器，PLL，頻率合成器時鐘發(fā)生器、PLL 和頻率合成器集成電路 (IC) 可為邏輯器件提供參考信號的穩(wěn)定定時脈沖，這些器件包括計算機、微控制器、數據通信系統(tǒng)和圖形/視頻發(fā)生器。這些集成電路可能包括緩沖器、驅動器、分頻器、倍頻器、多路復用器、合成器、扇出分配器和預分頻器。