ICS844256 Datasheet, PDF (7/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

844256AM
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844256
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
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
Gb Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.48ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Gb 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
Gb Ethernet Filter
125MHz
RMS Phase Jitter (Random)
1.875MHz to 20MHz = 0.44ps (typical)
Raw Phase Noise Data
Phase Noise Result by adding
Gb Ethernet Filter to raw data
100
1k
10k
100k
1M
10M
100M
OFFSET FREQUENCY (HZ)
www.icst.com/products/hiperclocks.html
7
REV. A NOVEMBER 29, 2005