ICS844801I-24 Datasheet, PDF (6/13 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-LVDS 400MHZ FREQUENCY SYNTHESIZER

ICS844801I-24
FEMTOCLOCKS™ CRYSTAL-TO-LVDS 400MHZ FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
PRELIMINARY
3.3V±5%
POWER SUPPLY
+ ^{Float GND–}
LVDS
Qx ^SCOPE
nQx
2.5V±5%
POWER SUPPLY
+ ^{Float GND–}
LVDS
Qx ^SCOPE
nQx
LVDS 3.3V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
Phase Noise Mask
f₁ ^{Offset Frequency} f₂
RMS Jitter = Area Under the Masked Phase Noise Plot
RMS PHASE JITTER
Clock
20%
Outputs
80%
t_R
80%
t_F
V_{SW I N G}
20%
OUTPUT RISE/FALL TIME
V^V_DD_DD
DC Input LVDS
out
➤
100
V_OD/∆ V_OD
out
DIFFERENTIAL OUTPUT VOLTAGE SETUP
LVDS 2.5V OUTPUT LOAD AC TEST CIRCUIT
nQ
Q
t _PW
t
PERIOD
odc = ^{t PW} x 100%
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
VV_DD_DD
out
DC Input LVDS
out
➤
V_OS/∆ V_OS
OFFSET VOLTAGE SETUP
IDT^™ / ICS^™ LVDS 400MHZ FREQUENCY SYNTHESIZER
6
ICS844801AGI-24 REV A JANUARY 16, 2008