参数资料
型号: ICS8535AGI-31LF
厂商: IDT, Integrated Device Technology Inc
文件页数: 12/15页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 2:4 20-TSSOP
标准包装: 74
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: 2:4
差分 - 输入:输出: 无/是
输入: LVCMOS,LVTTL,晶体
输出: LVPECL
频率 - 最大: 266MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 管件
其它名称: 800-1960-5
8535AGI-31LF
ICS8535AGI-31LF-ND
ICS8535I-31
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
ICS8535AGI-31 REVISION A JANUARY 27, 2010
6
2010 Integrated Device Technology, Inc.
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 dependent on
the input source and measurement equipment.
Additive Phase Jitter @ 155.52MHz
12kHz to 20MHz = 0.057ps (typical)
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
Offset Frequency (Hz)
SSB
Phas
e
N
o
ise
dBc/Hz
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