- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16329 > LMK04033BEVAL/NOPB (National Semiconductor)BOARD EVALUATION LMK04033 PDF資料下載
參數(shù)資料
| 型號(hào)： | LMK04033BEVAL/NOPB |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 32/65頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION LMK04033 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PowerWise® |
| 主要目的： | 計(jì)時(shí)，時(shí)鐘調(diào)節(jié)器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LMK04033 |
| 主要屬性： | LVPECL、2VPECL、LVDS 和 LVCMOS 輸出 |
| 次要屬性： | 集成式 PLL 和 VCO |
| 已供物品： | 板，線纜，文檔 |
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頁當(dāng)前第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
SNOSAZ8J – SEPTEMBER 2008 – REVISED SEPTEMBER 2011
Table 20. EN_PLL2_XTAL: External Crystal Option
EN_PLL2_XTAL
Oscillator Amplifier State
0
OFF
1
ON
EN_Fout: Fout Power Down Bit
The EN_Fout bit allows the Fout port to be enabled or disabled. By default EN_Fout = 0.
CLK Global Enable: Clock Global enable bit
In addition to the external GOE pin, an internal Register 13 bit (b18) can be used to globally enable/disable the
clock outputs via the uWire programming interface. The default value is 1. When CLK Global Enable = 1, the
active output clocks are enabled. The active output clocks are disabled if this bit is 0.
POWERDOWN Bit -- Device Power Down
This bit can power down the entire device. Enabling this bit powers down the entire device and all functional
blocks, regardless of the state of any of the other bits or pins.
Table 21. Power Down Bit Values
POWERDOWN Bit
Mode
0
Normal Operation
1
Entire device powered down
EN_PLL2 REF2X: PLL2 Frequency Doubler control bit
When FOSCin is below 50 MHz, the PLL2 frequency doubler can be enabled by setting EN_PLL2_REF2X = 1. The
default value is 0. When EN_PLL2_REF2X = 1, the signal at the OSCin port bypasses the PLL2_R counter and
is passed through a frequency doubler circuit. The output of this circuit is then input to the PLL2 phase
comparator block. This feature allows the phase comparison frequency to be increased for lower frequency
OSCin sources (< 50 MHz), and can be used with either VXCOs or crystals. For instance, when using a pullable
crystal of 12.288 MHz to drive the OSCin port, the PLL2 phase comparison frequency is 24.576 MHz when
EN_PLL2_REF2X = 1. A higher PLL phase comparison frequency reduces PLL2 in-band phase noise and RMS
jitter. The PLL in-band phase noise can be reduced by approximately 2 to 3 dB. The on-chip loop filter typically is
enabled to reduce PLL2 reference spurs when EN_PLL2_REF2X is enabled. Suggested values in this case are:
R3 = 600
Ω, C3 = 50 pF, R4 = 10 kΩ, C4 = 60 pF.
PLL2 Internal Loop Filter Component Values
Internal loop filter components are available for PLL2, enabling the user to implement either 3rd or 4th order loop
filters without requiring external components. The user may select from a fixed set of values for both the resistors
and capacitors. Internal loop filter resistance values for R3 and R4 can be set individually according to Table 22
and Table 23.
Table 22. PLL2 Internal Loop Filter Resistor Values, PLL2_R3_LF
PLL2_R3_LF [2:0]
RESISTANCE
b2
b1
b0
0
< 600
Ω
0
1
10 k
Ω
0
1
0
20 k
Ω
0
1
30 k
Ω
1
0
40 k
Ω
1
0
1
Invalid
1
0
Invalid
1
Invalid
38
Copyright 2008–2011, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M3YYK-1036R | IDC CABLE - MPD10K/MC10M/MPD10K |
| LMK04000BEVAL/NOPB | BOARD EVAL PRECISION CLOCK PLL |
| 3-1906052-1 | CA 2MM OFNR 62.5/125,LC SEC BLU |
| PCX1C151MCL1GS | CAP ALUM 150UF 16V 20% SMD |
| 3-1906051-1 | CA 2MM OFNR 62.5/125,LC SEC RED |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMK04033BISQ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low-Noise Clock Jitter Cleaner with Cascaded PLLs |
| LMK04033BISQ/NOPB | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| LMK04033BISQE | 制造商:Texas Instruments 功能描述:Clock Conditioner 48-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:PRECISION CLOCK CONDITIONER, 48LLP |
| LMK04033BISQE/NOPB | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| LMK04033BISQX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low-Noise Clock Jitter Cleaner with Cascaded PLLs |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。