参数资料
型号: ICS8534AY-01LFT
厂商: IDT, Integrated Device Technology Inc
文件页数: 19/21页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 2:22 64-TQFP
标准包装: 500
系列: HiPerClockS™
类型: 扇出缓冲器(分配),多路复用器
电路数: 1
比率 - 输入:输出: 2:22
差分 - 输入:输出: 是/是
输入: CML,HCSL,LVDS,LVHSTL,LVPECL,SSTL
输出: LVPECL
频率 - 最大: 500MHz
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-TQFP 裸露焊盘
供应商设备封装: 64-TQFP-EP(10x10)
包装: 带卷 (TR)
其它名称: 8534AY-01LFT
ICS8534AY-01 REVISION B MARCH 28, 2011
7
2011 Integrated Device Technology, Inc.
ICS8534-01 Data Sheet
LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
Additive Phase Jitter
The spectral purity in a band at a specific offset from the fundamental
compared to the power of the fundamental is called the dBc Phase
Noise. This value is normally expressed using a Phase noise plot
and is most often the specified plot in many applications. Phase noise
is defined as the ratio of the noise power present in a 1Hz band at a
specified offset from the fundamental frequency to the power value of
the fundamental. This ratio is expressed in decibels (dBm) or a ratio
of the power in the 1Hz band to the power in the fundamental. When
the required offset is specified, the phase noise is called a dBc value,
which simply means dBm at a specified offset from the fundamental.
By investigating jitter in the frequency domain, we get a better
understanding of its effects on the desired application over the entire
time record of the signal. It is mathematically possible to calculate an
expected bit error rate given a phase noise plot.
As with most timing specifications, phase noise measurements has
issues relating to the limitations of the equipment. Often the noise
floor of the equipment is higher than the noise floor of the device. This
is illustrated above. The device meets the noise floor of what is
shown, but can actually be lower. The phase noise is dependant on
the input source and measurement equipment.
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
1k
10k
100k
1M
10M
100M
Additive Phase Jitter, RMS @ 156.25MHz
12kHz to 20MHz = 0.15ps (typical)
Offset Frequency (Hz)
SSB
Phase
Noise
dBc/Hz
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