ICS843256 Datasheet, PDF (6/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

843256AM
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS843256
FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
-200
10
TYPICAL PHASE NOISE AT 125MHZ @ 3.3V
Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.33ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Ethernet Filter to raw data
100
1k
10k
100k
1M
10M
100M
OFFSET FREQUENCY (HZ)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-190
-200
10
TYPICAL PHASE NOISE AT 125MHZ @ 3.3V/2.5V
Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.32ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Ethernet Filter to raw data
100
1k
10k
100k
1M
OFFSET FREQUENCY (HZ)
www.icst.com/products/hiperclocks.html
10M
100M
REV. A NOVEMBER 29, 2005
6