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參數(shù)資料
| 型號： | MAX3672 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Jitter 155MHz/622MHz Clock Generator |
| 中文描述： | 低抖動、155MHz/622MHz時鐘發(fā)生器 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 493K |
| 代理商： | MAX3672 |
M
a VCO, the user needs to take into account the VCO
’
s
phase noise and modulation bandwidth. Phase noise is
important because the phase noise above the PLL band-
width is dominated by the VCO noise performance.
The modulation bandwidth of the VCO contributes an
additional higher-order pole (HOP) to the system and
should be greater than the HOP set with the external filter
components.
Noise Performance Optimization
Depending on the application, there are many different
ways to optimize the PLL performance. The following
are general guidelines to improve the noise on the sys-
tem output clock.
1) If the reference clock noise dominates the total sys-
tem-clock output jitter, then decreasing the loop
bandwidth (K) reduces the output jitter.
2) If the VCO noise dominates the total system clock
output jitter, then increasing the loop bandwidth (K)
reduces the output jitter.
3) Smaller total divider ratio (N1
N2), lower HOP, and
smaller R
1
reduce the spurious output jitter.
4) Smaller R
1
reduces the random noise due to the op amp.
Low-Jitter 155MHz/622MHz Clock Generator
10
______________________________________________________________________________________
V
CC
- 1.3V
V
CC
10.5k
10.5k
REFLCK+
REFLCK-
MAX3672
Figure 1. Input Interface
OUT+
OUT-
V
CC
MAX3672
Figure 2. Output Interface
0.6V
60k
60k
REFCLK
VCO
LOL
THADJ
CTH
MAX3672
Figure 3. Loss-of-Lock Indicator
Interface Schematics
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3672E/D | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX3672E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3673DBETN+ | 功能描述:時鐘合成器/抖動清除器 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 |
| MAX3673ETN | 功能描述:時鐘合成器/抖動清除器 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 |
| MAX3673ETN+ | 功能描述:時鐘合成器/抖動清除器 Low-Jitter Frequency Synthesizer 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 |
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