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CDCE421 Datasheet(PDF) 15 Page - Texas Instruments

No. de Pieza. CDCE421
Descripción  Fully Integrated Wide-Range, Low-Jitter, Crystal-Oscillator Clock Generator
Descarga  24 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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CDCE421 Datasheet(HTML) 15 Page - Texas Instruments

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f − Single-Sideband Frequency − Hz
G002
−160
−140
−120
−100
−80
−60
−40
−20
0
10
100
1k
100M
10k
100k
1M
10M
CDCE421
www.ti.com..................................................................................................................................................... SCAS842B – APRIL 2007 – REVISED JANUARY 2009
If the CDCE421 is being referenced by a clean external LVCMOS input of 33.33 MHz, Figure 7 shows the SSB
phase noise plot of the output at 400 MHz from 100 Hz to 40 MHz from carrier. See Figure 10 for test setup.
Figure 7. Phase Noise Plot for LVDS Output at 400 MHz
Table 4. Phase Noise Parameters With LVCMOS Input of 33.33 MHz and LVDS Output at 400 MHz
Phase noise specifications under following assumptions: input frequency f = 33.33 MHz (VCO = 1, prescaler = 5, output divider =
1), fout = 400 MHz (driver mode = LVDS)
PARAMETER
MIN
TYP
MAX
UNIT
phn100
Phase noise at 100 Hz
–99
dBc/Hz
phn1k
Phase noise at 1 kHz
–109
dBc/Hz
phn10k
Phase noise at 10 kHz
–119
dBc/Hz
phn100k
Phase noise at 100 kHz
–121
dBc/Hz
phn1M
Phase noise at 1 MHz
–130
dBc/Hz
phn10M
Phase noise at 10 MHz
–147
dBc/Hz
phn20M
Phase noise at 20 MHz
–147
dBc/Hz
JRMS
RMS jitter integrated from 12 kHz to 20 MHz
409
fs
Copyright © 2007–2009, Texas Instruments Incorporated
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