參數(shù)資料
型號(hào): ICS85454-01LFT
元件分類(lèi): 時(shí)鐘及定時(shí)
英文描述: 85454 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC16
封裝: 3 X 3 MM, 0.95 MM HEIGHT, ROHS COMPLIANT, MO-220, VFQFN-32
文件頁(yè)數(shù): 11/15頁(yè)
文件大?。?/td> 370K
代理商: ICS85454-01LFT
85454AK-01
www.icst.com/products/hiperclocks.html
REV. B MARCH 14, 2006
5
Integrated
Circuit
Systems, Inc.
ICS85454-01
DUAL 2:1/1:2
DIFFERENTIAL-TO-LVDS MULTIPLEXER
ADDITIVE PHASE JITTER
Additive Phase Jitter at
622.08MHz (12kHz - 20MHz)
= 0.05ps (typical)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
10
100
1k
10k
100k
1M
10M
100M
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
As with most timing specifications, phase noise measure-
ments have issues. The primary issue relates to the limita-
tions of the equipment. Often the noise floor of the equipment
is higher than the noise floor of the device. This is illustrated
ratio of the power in the 1Hz band to the power in the funda-
mental. 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 fre-
quency 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.
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.
OFFSET FROM CARRIER FREQUENCY (HZ)
SSB
P
HASE
N
OISE
dB
c/H
Z
相關(guān)PDF資料
PDF描述
ICS85454-01T 85454 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC16
ICS85454AK-01LFT 85454 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC16
ICS85454AK-01LF 85454 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC16
ICS8545AG-02 8545 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
ICS8545AG-02LF 8545 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
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