
84320AY-01
www.idt.com
REV. D JULY 26, 2010
7
ICS84320-01
780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
TYPICAL PHASE NOISE AT 155.52MHZ
TYPICAL PHASE NOISE AT 622.08MHZ
OFFSET FREQUENCY (HZ)
dBc
Hz
N
OISE
P
OWER
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
1
10
100
1k
10k
100k
1M
10M
100M
155.52MHz
RMS Phase Jitter (Random)
12kHz to 20MHz = 2.5ps (typical)
Phase Noise Result by adding
Sonet Bandpass Filter to raw data
Raw Phase Noise Data
OC-48 Sonet Bandpass Filter
OFFSET FREQUENCY (HZ)
dBc
Hz
N
OISE
P
OWER
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
622.08MHz
RMS Phase Jitter (Random)
12kHz to 20MHz = 2.48ps (typical)
Phase Noise Result by adding
Sonet Bandpass Filter to raw data
Raw Phase Noise Data
OC-48 Sonet Bandpass Filter
1
10
100
1k
10k
100k
1M
10M
100M