
ICS844002I-01
FEMTOCLOCKS CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
IDT / ICS LVDS FREQUENCY SYNTHESIZER
6
ICS844002AGI-01 REV. D OCTOBER 20, 2008
Parameter Measurement Information
2.5V Output Load AC Test Circuit
RMS Phase Jitter
Output Duty Cycle/Pulse Width/Period
Output Skew
Output Rise/Fall Time
Offset Voltage Setup
SCOPE
Qx
nQx
2.5V±5%
POWER SUPPLY
+–
Float GND
LVDS
VDD,
VDDO
VDDA
Phase Noise Mask
Offset Frequency
f
1
f
2
Phase Noise Plot
RMS Jitter = Area Under the Masked Phase Noise Plot
Noise
P
o
w
er
t
PW
t
PERIOD
t
PW
t
PERIOD
odc =
x 100%
Q0, Q1
Qx
Qy
tsk(o)
20%
80%
20%
tR
t F
VOD
Q0, Q1
out
LVDS
DC Input
VOS/ VOS
V
DD