- 您现在的位置：买卖IC网 > PDF目录69342 > SI5317A-C-GMR (SILICON LABORATORIES) 711 MHz, OTHER CLOCK GENERATOR, QCC36 PDF资料下载
参数资料
| 型号： | SI5317A-C-GMR |
| 厂商： | SILICON LABORATORIES |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 711 MHz, OTHER CLOCK GENERATOR, QCC36 |
| 封装： | 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD, QFN-36 |
| 文件页数： | 24/46页 |
| 文件大小： | 407K |
| 代理商： | SI5317A-C-GMR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页
Si5317
30
Rev. 1.1
5.1. Crystal/Reference Clock Selection
An external low-jitter clock or a low-cost crystal is used as part of a fixed-frequency oscillator within the DSPLL.
This external clock is required for the device to perform jitter attenuation. Silicon Laboratories recommends using a
high-quality crystal.
In VCO freeze, the DSPLL remains locked to this external clock. Any changes in the frequency of this clock when
the DSPLL is in VCO freeze will be tracked by the output of the device. Note that crystals can have temperature
sensitivities. See “AN591: Crystal Selection for the Si5315 and Si5317“ for a list of approved crystals for the Si5317
and guidance in their selection. AN591 can be downloaded from the Silicon Labs web site: www.silabs.com.
Because the crystal is used as a jitter reference, rapid changes of the crystal temperature can temporarily disturb
the output phase and frequency. For example, it is recommended that the crystal not be placed close to a fan that
is being turned off and on. If a situation such as this is unavoidable, the crystal should be thermally isolated with an
insulating cover.
5.1.1. XA/XB Clock Drift
During VCO freeze, long-term and temperature-related drift of the XA/XB clock input results in a one-to-one drift of
the output frequency. The stability of the any frequency output is identical to the drift of the XA/XB frequency. This
means that for the most demanding applications where the drift of a crystal is not acceptable, an external
temperature-compensated or ovenized oscillator will be required. Drift is not an issue unless the part is in VCO
freeze. Also, the initial accuracy of the XA/XB oscillator (or crystal) is not relevant.
5.1.2. XA/XB Jitter
Jitter on the XA/XB input has a roughly one-to-one transfer function to the output jitter over the bandwidth ranging
from 100 Hz up to 30 kHz. If a crystal is used on the XA/XB pins, this will have low jitter if a suitable crystal is in
use. If the XA/XB pins are connected to an external oscillator, the jitter of the external oscillator may contribute
significantly to the output jitter.
Table 13. XA/XB Reference Sources and Frequencies
RATE[1:0]
Type
Recommended
Lower limit
Upper limit
HH
Reserved
—
HM
Reserved
—
HL
Reserved
—
MH
External clock
114.285 MHz
109 MHz
125.5 MHz
MM
3rd overtone crystal*
114.285 MHz
—
ML
Reserved
—
LH
Reserved
—
LM
External clock
38.88 MHz
37 MHz
41 MHz
LL
Fundamental mode crystal*
—
*Note:
See “AN591: Crystal Selection for the Si5315 and Si5317.”
相关PDF资料 |
PDF描述 |
|---|---|
| SI5317B-C-GMR | 350 MHz, OTHER CLOCK GENERATOR, QCC36 |
| SI5350A-AXXXXX-GT | 125 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO10 |
| SI5351C-AGU | 160 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO24 |
| SI5351A-AGU | 160 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO24 |
| SI5351C-AGM | 160 MHz, PROC SPECIFIC CLOCK GENERATOR, QCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| Si5317B-C-GM | 功能描述:标准时钟振荡器 Pin-Program. Jitter Cleaning Clock RoHS:否 制造商:AVX 产品:Standard Clock Oscillators 封装 / 箱体:7 mm x 5 mm 频率:75 MHz 频率稳定性:50 PPM 电源电压:2.5 V 负载电容: 端接类型:SMD/SMT 最小工作温度:0 C 最大工作温度:+ 70 C 输出格式:LVDS 尺寸: 封装:Reel 系列: |
| SI5317B-C-GMR | 功能描述:时钟合成器/抖动清除器 Pin-Program Jitter Clean Clk 1In/2Out RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| Si5317C-C-GM | 功能描述:标准时钟振荡器 Pin-Program. Jitter Cleaning Clock RoHS:否 制造商:AVX 产品:Standard Clock Oscillators 封装 / 箱体:7 mm x 5 mm 频率:75 MHz 频率稳定性:50 PPM 电源电压:2.5 V 负载电容: 端接类型:SMD/SMT 最小工作温度:0 C 最大工作温度:+ 70 C 输出格式:LVDS 尺寸: 封装:Reel 系列: |
| SI5317C-C-GMR | 功能描述:时钟合成器/抖动清除器 Pin-Program Jitter Clean Clk 1In/2Out RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| Si5317D-C-GM | 功能描述:标准时钟振荡器 Pin-Program. Jitter Cleaning Clock RoHS:否 制造商:AVX 产品:Standard Clock Oscillators 封装 / 箱体:7 mm x 5 mm 频率:75 MHz 频率稳定性:50 PPM 电源电压:2.5 V 负载电容: 端接类型:SMD/SMT 最小工作温度:0 C 最大工作温度:+ 70 C 输出格式:LVDS 尺寸: 封装:Reel 系列: |
发布紧急采购，3分钟左右您将得到回复。