
ICS843001-21
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS LVPECL FREQUENCY SYNTHESIZER
7
ICS843001AG-21 REV. AMARCH 15, 2007
AC Electrical Characteristics
Table 6. AC Characteristics, VCC = VCCA = VCCO_CMOS = VCCO_PECL = 3.3V ± 5%, TA = 0°C to 70°C
NOTE 1: Measured from the VCC/2 of the input to VCCO_CMOS/2 of the output.
NOTE 2: Phase jitter measured using a 19.44MHz quartz crystal.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
Typical Phase Noise at 622.08MHz
Parameter
Symbol
Test Conditions
Minimum
Typical
Maximum
Units
fOUT
Output Frequency
56
700
MHz
tPD
Propagation Delay;
NOTE 1
TEST_CLK to
REF_CLK
2.3
2.8
ns
tjit()
RMS Phase Jitter, (Random);
NOTE 2, 3
622.08MHz,
(12kHz – 20MHz)
0.80
ps
tVCO
PLL VCO Lock Range
560
700
MHz
tR / tF
Output
Rise/Fall Time
Q0, Q0
20% to 80%
200
500
ps
REF_CLK
20% to 80%
300
800
ps
odc
Output Duty Cycle
Q0, Q0
45
55
%
REF_CLK
44
56
%
OC-12 Filter
Phase Noise Result by adding a
Sonet OC-12 filter to raw data
Raw Phase Noise Data
622.08MHz
RMS Phase Jitter (Random)
12kHz to 20MHz = 0.80ps (typical)
N
o
ise
P
o
wer
d
Bc
Hz
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
100
1k
10k
100k
1M
10M
100M
Offset Frequency (Hz)