CDC421A100 Datasheet, PDF (5/15 Pages) Texas Instruments – Fully-Integrated, Fixed-Frequency, Low-Jitter Crystal Oscillator Clock Generator

CDC421AXXX
www.ti.com ....................................................................................................................................................................................................... SCAS875 – MAY 2009
JITTER CHARACTERISTICS IN INPUT CLOCK MODE
Jitter characterization tests are performed using an LVCMOS input signal driving the CDC421Axxx device, as
Figure 2 illustrates.
0.1 pF
50 W
100 pF
XIN 1
CDC421Axxx
XIN 2
150 W
150 W
Phase Noise
Analyzer
50 W
Figure 2. Jitter Test Configuration for an LVTTL Input Driving CDC421Axxx
When the CDC421Axxx is referenced by an external, clean LVCMOS input of 31.25 MHz, 33.33 MHz, and
35.4167 MHz, Table 1 to Table 7 list the measured SSB phase noise of all the outputs supported by the
CDC421Axxx device (100 MHz, 106.25 MHz, 125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and 312.5 MHz)
from 100 Hz to 20 MHz from the carrier.
Table 1. Phase Noise Data with LVCMOS Input of 33.3333 MHz and LVPECL Output at 100.00 MHz⁽¹⁾
phn₁₀₀
phn_1k
phn_10k
phn_100k
phn_1M
phn_10M
phn_20M
J_RMS
T_j
D_j
PARAMETER
Phase noise at 100 Hz
Phase noise at 1 kHz
Phase noise at 10 kHz
Phase noise at 100 kHz
Phase noise at 1 MHz
Phase noise at 10 MHz
Phase noise at 20 MHz
RMS jitter integrated from 12 kHz to 20 MHz
Total jitter
Deterministic jitter
MIN
TYP
MAX
UNIT
–111
dBc/Hz
–121
dBc/Hz
–131
dBc/Hz
–133
dBc/Hz
–142
dBc/Hz
–149
dBc/Hz
–149
dBc/Hz
507
fs
35.33
ps
11.54
ps
(1) Phase noise specifications under following conditions: input frequency = 33.3333 MHz, output frequency = 100.00 MHz.
Table 2. Phase Noise Data with LVCMOS Input of 35.4167 MHz and LVPECL Output at 106.25 MHz⁽¹⁾
phn₁₀₀
phn_1k
phn_10k
phn_100k
phn_1M
phn_10M
phn_20M
J_RMS
T_j
D_j
PARAMETER
Phase noise at 100 Hz
Phase noise at 1 kHz
Phase noise at 10 kHz
Phase noise at 100 kHz
Phase noise at 1 MHz
Phase noise at 10 MHz
Phase noise at 20 MHz
RMS jitter integrated from 12 kHz to 20 MHz
Total jitter
Deterministic jitter
MIN
TYP
MAX
UNIT
–112
dBc/Hz
–121
dBc/Hz
–125
dBc/Hz
–129
dBc/Hz
–142
dBc/Hz
–151
dBc/Hz
–151
dBc/Hz
530
fs
30.39
ps
11
ps
(1) Phase noise specifications under following conditions: input frequency = 35.4167 MHz, output frequency = 106.25 MHz.
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
5