ICS844002 Datasheet, PDF (7/16 Pages) Integrated Device Technology – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

ICS844002
FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
3.3V±5%
POWER SUPPLY
+ Float GND –
V_DD,
V_{DDO VDDA}
LVDS
SCOPE
Qx
nQx
2.5V±5%
POWER SUPPLY
+ Float GND –
V_DD,
V_{DDO VDDA}
LVDS
SCOPE
Qx
nQx
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
nQx
Qx
nQy
Qy
t sk(o)
OUTPUT SKEW
Phase Noise Plot
Phase Noise Mask
f₁ ^{Offset Frequency} f₂
RMS Jitter = Area Under the Masked Phase Noise Plot
RMS PHASE JITTER
V_DD
DC Input LVDS
out
➤
100
V_OD/Δ V_OD
out
2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
nQ0, nQ1
Q0, Q1
t _PW
t
PERIOD
odc = ^{t PW} x 100%
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
Clock
20%
Outputs
80%
t_R
80%
t_F
V_{SW I N G}
20%
OUTPUT RISE/FALL TIME
V_DD
DC Input LVDS
out
➤
out
V_OS/Δ V_OS
DIFFERENTIAL OUTPUT VOLTAGE SETUP
OFFSET VOLTAGE SETUP
IDT^™ / ICS^™ LVDS FREQUENCY SYNTHESIZER
7
ICS844002AG REV. A SEPTEMBER 28, 2007