参数资料
型号: AD9547BCPZ-REEL7
厂商: Analog Devices Inc
文件页数: 93/104页
文件大小: 0K
描述: IC CLOCK GEN/SYNCHRONIZR 64LFCSP
产品变化通告: AD9547 Mask Change 20/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,LVDS,LVPECL
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
频率 - 最大: 750kHz
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)
Data Sheet
AD9547
Rev. E | Page 89 of 104
Table 120. Loop Mode
Address
Bit
Bit Name
Description
0x0A01
7
Unused
Unused.
6
User holdover
Force the device into holdover mode.
0 (default) = normal operation.
1 = force device into holdover mode.
The device functions as though all input references are faulted.
5
User free run
Force the device into free-run mode.
0 (default) = normal operation.
1 = force device into free-runmode.
The free-running frequency tuning word register (Address 0x0300 to Address 0x0305)
specifies the DDS output frequency.
Note that, when user free run is set, it overrides user holdover.
[4:3]
User selectionmode
Select the operating mode of the reference switchingstate machine.
00 (default) = automatic mode. The fully automatic priority-basedalgorithm selects the
active reference (Bits[1:0] are ignored).
01 = fallback mode. The active reference is the user reference (Bits[1:0]) as long as it is valid.
Otherwise, use the fully automatic priority-basedalgorithm to select the active reference.
10 = holdover mode. The active reference is the user reference (Bits[1:0]) as long as it is
valid. Otherwise, enter holdover mode.
11 = manual mode. The active reference is always the user reference (Bits[1:0]). When using
manual mode, be sure that the reference declaredas the user reference (Bits[1:0]) is
programmedfor manual reference-to-profile assignment inthe appropriate manual
reference profile selectionregister (Address 0x0503 and Address 0x0506).
2
Unused
Unused. Write a 0 to this bit.
[1:0]
User reference selection
Input reference whenuser selectionmode = 01, 10, or 11.
00 (default) = Input Reference A.
01 = Input Reference AA.
10 = Input Reference B.
11 = Input Reference BB.
Table 121. Cal/Sync
Address
Bit
Bit Name
Description
0x0A02
[7:2]
Unused
Unused.
1
Sync distribution
Setting this bit (default = 0) initiates synchronization of the clock distributionoutput. When
this bit = 1, the clock distribution output stalls.Synchronizationoccurs onthe 1 to 0 transitionof
this bit.
0
Calibrate SYSCLK
A 0 to 1 transition of this bit (default = 0), followed by an IO_UPDATE, initiates an internal
calibrationof the SYSCLK PLL (assuming it is enabled). The calibrationroutine automatically
selects the proper VCO frequency band and signal amplitude. The internal system clock stalls
duringthe calibrationprocedure,disablingthedeviceuntil thecalibrationis complete(a few
milliseconds). Ifthe user wishes to recalibrate the SYSCLK PLL and this bit is already set to 1,
the user must first write a 0 to this bit, issue an IO_UPDATE, write a 1 to this bit, and issue
another IO_UPDATE.
相关PDF资料
PDF描述
AD9548BCPZ-REEL7 IC CLOCK GEN/SYNCHRONIZR 88LFCSP
AD9549ABCPZ-REEL7 IC CLOCK GEN/SYNCHRONIZR 64LFCSP
AD9550BCPZ-REEL7 IC INTEGER-N TRANSLATOR 32-LFCSP
AD9551BCPZ IC CLOCK GEN MULTISERV 40-LFCSP
AD9552BCPZ-REEL7 IC PLL CLOCK GEN LP 32LFCSP
相关代理商/技术参数
参数描述
AD9548 制造商:AD 制造商全称:Analog Devices 功能描述:Quad/Octal Input Network Clock Generator/Synchronizer
AD9548/PCBZ 功能描述:BOARD EVAL FOR AD9548 RoHS:是 类别:编程器,开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理,热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板,CD,电源
AD9548/PCBZ 制造商:Analog Devices 功能描述:Clock Generator Evaluation Board
AD9548BCPZ 功能描述:IC CLOCK GEN/SYNCHRONIZR 88LFCSP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:1 系列:- 类型:时钟/频率发生器,多路复用器 PLL:是 主要目的:存储器,RDRAM 输入:晶体 输出:LVCMOS 电路数:1 比率 - 输入:输出:1:2 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP(0.173",4.40mm 宽) 供应商设备封装:16-TSSOP 包装:Digi-Reel® 其它名称:296-6719-6
AD9548BCPZ-REEL7 功能描述:IC CLOCK GEN/SYNCHRONIZR 88LFCSP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:28 系列:- 类型:时钟/频率发生器 PLL:是 主要目的:Intel CPU 服务器 输入:时钟 输出:LVCMOS 电路数:1 比率 - 输入:输出:3:22 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3.135 V ~ 3.465 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:64-TFSOP (0.240",6.10mm 宽) 供应商设备封装:64-TSSOP 包装:管件