參數(shù)資料
型號: AD9523-1BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 1/60頁
文件大?。?/td> 0K
描述: IC INTEGER-N CLCK GEN 72LFCSP
標(biāo)準(zhǔn)包裝: 1
類型: 時鐘/頻率發(fā)生器,扇出緩沖器(分配),多路復(fù)用器
PLL:
主要目的: 以太網(wǎng),光纖通道,SONET/SDH
輸入: CMOS
輸出: HSTL,LVCMOS,LVDS,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 2:14
差分 - 輸入:輸出: 是/是
頻率 - 最大: 1GHz
電源電壓: 1.768 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 72-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 72-LFCSP
包裝: 托盤
配用: AD9523/PCBZ-ND - BOARD EVAL FOR AD9523
Low Jitter Clock Generator with
14 LVPECL/LVDS/HSTL/29 LVCMOS Outputs
AD9523-1
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2010–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Output frequency: <1 MHz to 1 GHz
Start-up frequency accuracy: <±100 ppm (determined by
VCXO reference accuracy)
Zero delay operation
Input-to-output edge timing: <150 ps
Dual VCO dividers
14 outputs: configurable LVPECL, LVDS, HSTL, and LVCMOS
14 dedicated output dividers with jitter-free adjustable delay
Adjustable delay: 63 resolution steps of period of VCO
output divider
Output-to-output skew: <50 ps
Duty cycle correction for odd divider settings
Automatic synchronization of all outputs on power-up
Absolute output jitter: <150 fs at 122.88 MHz
Integration range: 12 kHz to 20 MHz
Broadband timing jitter: 124 fs
Digital lock detect
Nonvolatile EEPROM stores configuration settings
SPI- and IC-compatible serial control port
Dual PLL architecture
PLL1
Low bandwidth for reference input clock cleanup with
external VCXO
Phase detector rate of 300 kHz to 75 MHz
Redundant reference inputs
Auto and manual reference switchover modes
Revertive and nonrevertive switching
Loss of reference detection with holdover mode
Low noise LVCMOS output from VCXO used for RF/IF
synthesizers
PLL2
Phase detector rate of up to 250 MHz
Integrated low noise VCO
APPLICATIONS
LTE and multicarrier GSM base stations
Wireless and broadband infrastructure
Medical instrumentation
Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs
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)
High performance wireless transceivers
ATE and high performance instrumentation
FUNCTIONAL BLOCK DIAGRAM
PLL1
REFA,
REFA
REFB,
REFB
REF_TEST
SDIO/SDA
ZD_IN, ZD_IN
CONTROL
INTERFACE
(SPI AND I2C)
EEPROM
PLL2
ZERO
DELAY
AD9523-1
14-CLOCK
DISTRIBUTION
SCLK/SCL
SDO
OSC_IN, OSC_IN
09
27
8-
00
1
DIVIDE-BY-
3, 4, 5
DIVIDE-BY-
3, 4, 5
8 OUTPUTS
OUT0,
OUT0
6 OUTPUTS
OUT3,
OUT3
OUT10,
OUT10
OUT13,
OUT13
OUT4,
OUT4
OUT9,
OUT9
Figure 1.
GENERAL DESCRIPTION
The AD9523-1 provides a low power, multi-output, clock
distribution function with low jitter performance, along with an
on-chip PLL and VCO with two VCO dividers. The on-chip VCO
tunes from 2.94 GHz to 3.1 GHz.
The AD9523-1 is defined to support the clock requirements for
long term evolution (LTE) and multicarrier GSM base station
designs. It relies on an external VCXO to provide the reference
jitter cleanup to achieve the restrictive low phase noise require-
ments necessary for acceptable data converter SNR performance.
The input receivers, oscillator, and zero delay receiver provide
both single-ended and differential operation. When connected
to a recovered system reference clock and a VCXO, the device
generates 14 low noise outputs with a range of 1 MHz to 1 GHz,
and one dedicated buffered output from the input PLL (PLL1).
The frequency and phase of one clock output relative to another
clock output can be varied by means of a divider phase select
function that serves as a jitter-free, coarse timing adjustment
in increments that are equal to half the period of the signal
coming out of the VCO.
An in-package EEPROM can be programmed through the serial
interface to store user-defined register settings for power-up
and chip reset.
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