- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9673 > AD9547BCPZ (Analog Devices Inc)IC CLOCK GEN/SYNCHRONIZR 64LFCSP PDF資料下載
參數(shù)資料
| 型號： | AD9547BCPZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 42/104頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLOCK GEN/SYNCHRONIZR 64LFCSP |
| 產(chǎn)品變化通告： | AD9547 Mask Change 20/Oct/2010 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 時鐘/頻率發(fā)生器，同步器 |
| PLL： | 是 |
| 主要目的： | 以太網(wǎng)，SONET/SDH，Stratum |
| 輸入： | CMOS，LVDS，LVPECL |
| 輸出： | CMOS，LVDS，LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:2 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 750kHz |
| 電源電壓： | 1.71 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 64-LFCSP-VQ（9x9） |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁當(dāng)前第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁
AD9547
Data Sheet
Rev. E | Page 42 of 104
active input reference. The detection of the rising edge synchro-
nizes the distribution output.
When sync source = 10, the rising edge of the primary synchro-
nization signal triggers the circuitry that detects a rollover of the
DDS accumulator (after processing by the DPLL feedback divider).
This corresponds to the zero crossing of the output of the phase-to-
amplitude converter in the DDS (less the open-loop phase offset
stored in Register 0x030D and Register 0x030E). The detection
of the DPLL feedback edge synchronizes the distribution output.
Active Reference Synchronization (Zero Delay)
Active reference synchronization is the term applied to the case
when sync source = 01 (Register 0x0402, Bits[5:4]). Referring to
Figure 47, this means that the active reference sync path is active
because Bit 4 = 1, enabling the lower AND gate and disabling
the upper AND gate. The edge detector in the active reference
sync block monitors the rising edges of the active reference
(the mux selects the active reference automatically). The edge
detector is armed via the primary synchronization signal, which
is one of the four inputs to the OR gate (typically the direct sync
source). As soon as the edge detector is armed, its output goes high,
which stalls the output dividers in the clock distribution block.
Furthermore, once armed, a rising edge from the active reference
forces the output of the edge detector low. This restarts the output
dividers, thereby synchronizing the clock distribution block.
The term zero delay applies because it provides a means to edge-
align the output signal with the active input reference signal.
Typically, zero-delay architectures use the output signal in the
feedback loop of a PLL to track input/output edge alignment.
Active reference synchronization, however, operates open loop.
That is, synchronization of the output via the distribution
synchronization logic occurs on a single edge of the active
reference.
The fact that an active reference edge triggers the falling edge of
the synchronization pulse means that the falling edge is asynchro-
nous to the signal that clocks the distribution output dividers
(CLKINx). Therefore, the output clock distribution logic reclocks
the internal synchronization pulse to synchronize it with the
CLKINx signal. This means that the output dividers restart after
a deterministic delay associated with the reclocking circuitry.
This deterministic delay has two components. The first deter-
ministic delay component is four or five periods of the CLKINx
signal. The one period uncertainty is due to the unknown position
of the asynchronous reference clock edge relative to the CLKINx
signal. The second deterministic delay component is one output
period of the distribution divider.
MULTIFUNCTION PIN
SYNC SOURCE
0
1
REGISTER
0x0402[5]
SYSCLK/4
DPLL
FEEDBACK
EDGE
REGISTER
0x0402[4]
REF A
REF BB
RESET
EDGE
DETECT
EDGE
DETECT
ARM
EDGE
DETECT
ARM
DIRECT SYNC
DPLL EDGE SYNC
ACTIVE REFERENCE SYNC
EEPROM SYNC
SOURCE
PRIMARY
SYNCHRONIZATION
SIGNAL
DIRECT SYNC
SOURCE
(ADDRESS DX 0x0A02[1])
AUTOMATIC SYNC
SOURCE
(REGISTER DX 0x0403)
TO CLOCK
DISTRIBUTION
SYNCHRONIZATION
CONTROL
STALL
DIVIDERS
SYNC OUTPUT
DISTRIBUTION
TO MULTIFUNCTION
PIN STATUS LOGIC
08
300-
02
3
Figure 47. Output Synchronization Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| D38999/20MF11JN | CONN RCPT 11POS WALL MNT W/SCKT |
| AD9549ABCPZ | IC CLOCK GEN/SYNCHRONIZR 64LFCSP |
| ADN2814ACPZ | IC CLOCK/DATA RECOVERY 32LFCSP |
| SM802105UMG | IC SYNTHESIZER 2CH 24-QFN |
| SM802104UMG | IC SYNTHESIZER 2CH 24-QFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9547BCPZ-REEL7 | 功能描述:IC CLOCK GEN/SYNCHRONIZR 64LFCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:- 標(biāo)準(zhǔn)包裝:28 系列:- 類型:時鐘/頻率發(fā)生器 PLL:是 主要目的:Intel CPU 服務(wù)器 輸入:時鐘 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:3:22 差分 - 輸入:輸出:無/是 頻率 - 最大:400MHz 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:64-TFSOP （0.240"，6.10mm 寬） 供應(yīng)商設(shè)備封裝:64-TSSOP 包裝:管件 |
| AD9548 | 制造商:AD 制造商全稱: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 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| 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 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/頻率發(fā)生器，多路復(fù)用器 PLL:是 主要目的:存儲器，RDRAM 輸入:晶體 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:1:2 差分 - 輸入:輸出:無/是 頻率 - 最大:400MHz 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:Digi-Reel® 其它名稱:296-6719-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。