参数资料
型号: AD9549ABCPZ-REEL7
厂商: Analog Devices Inc
文件页数: 71/76页
文件大小: 0K
描述: IC CLOCK GEN/SYNCHRONIZR 64LFCSP
产品变化通告: AD9549A Mask Change 22/Oct/2010
标准包装: 750
类型: 时钟/频率发生器,同步器
PLL:
主要目的: 以太网,SONET/SDH,Stratum
输入: CMOS,LVDS,LVPECL
输出: CMOS,HSTL
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
频率 - 最大: 750MHz
电源电压: 1.71 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘,CSP
供应商设备封装: 64-LFCSP-VQ(9x9)
包装: 带卷 (TR)
AD9549
Rev. D | Page 73 of 76
APPLICATIONS INFORMATION
SAMPLE APPLICATIONS CIRCUIT
CLK
CLKB
SYNCB
LOW-PASS
FILTER
AD9514
/1...../32
Δt
OUT0/
OUT0B
OUT1/
OUT1B
OUT2/
OUT2B
SYSCLK
INPUT A
INPUT B
06744-
059
AD9549
DDS/
DAC
REF A
REF B
DIFF HSTL OUTPUT
FDBK_IN
FDBK_INB
CMOS OUTPUT
LDDS/CMOS
LVPECL
Figure 59. AD9549 and AD9514 Precision Clock Distribution Circuit
Applications Circuit Features
Features of this applications circuit include the following:
Input frequencies down to 8 kHz; output frequencies up to
400 MHz
Programmable loop bandwidth down to <1 Hz
Automatic redundant clock switchover with user-selectable
rate-of-phase adjustment
Automatic Stratum 3/3E clock holdover, depending on the
configuration
Phase noise (fC = 122.3 MHz and 100 Hz loop bandwidth);
100 Hz offset: 107 dBc/Hz; 1 kHz offset: 142 dBc/Hz;
100 kHz offset: 157 dBc/Hz; two zero-delay outputs with
programmable postdivider and synchronization
Two additional outputs (nonzero delay) on the AD9549
Programmable skew adjustment on one AD9514 output
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