ICS874004 Datasheet, PDF (5/10 Pages) Integrated Circuit Systems – PCI EXPRESS JITTER ATTENUATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS874004
PCI EXPRESS™
JITTER ATTENUATOR
PARAMETER MEASUREMENT INFORMATION
3.3V
POWER SUPPLY
+ ^{Float GND} -
LVDS
SCOPE
Qx
nQx
3.3V LVDS OUTPUT LOAD AC TEST CIRCUIT
nQAx,
nQBx
QAx,
QBx
tcycle n
➤
tcycle n+1
➤
tjit(cc) = tcycle n –tcycle n+1
1000 Cycles
V_DD
nCLK,
nFB_IN
V
PP
CLK,
FB_IN
GND
Cross Points
DIFFERENTIAL INPUT LEVEL
nQAx,
nQBx
QAx,
QBx
Pulse Width
t
PERIOD
odc = ^{t PW}
t _PERIOD
V
CMR
CYCLE-TO-CYCLE JITTER
Clock
20%
Outputs
80%
t_R
80%
t_F
V_{SW I N G}
20%
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
V_DD
out
DC Input LVDS
out
➤
V_OS/∆ V_OS
OUTPUT RISE/FALL TIME
V_DD
DC Input LVDS
OFFSET VOLTAGE SETUP
out
➤
100
V_OD/∆ V_OD
out
DIFFERENTIAL OUTPUT VOLTAGE SETUP
874004AG
www.icst.com/products/hiperclocks.html
5
REV. A JANUARY 21, 2005