Datasheet

Data Sheet AD9577
Rev. 0 | Page 13 of 44
CLOCK OUTPUTS
AC coupling capacitors of 0.1 μF used where appropriate.
Table 8.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL CLOCK OUTPUTS
Output Frequency 637.5 MHz
Load is 200 Ω to GND at output pins, then
ac-coupled to 50 Ω terminated measurement
equipment.
Output Voltage Swing, V
OD
610 740 950 mV
Load is 200 Ω to GND at output pins, then
ac-coupled to 50 Ω terminated measurement
equipment. For differential amplitude, see
Figure 2.
Duty Cycle 45 55 %
Load is 200 Ω to GND at output pins, then
ac-coupled to 50 Ω terminated measurement
equipment.
Output High Voltage, V
OH
V
S
− 1.24 V
S
− 0.94 V
S
− 0.83 V
Load is 127 Ω/83 Ω potential divider across
supply dc-coupled into 1 MΩ terminated
measurement equipment, outputs static.
Output Low Voltage, V
OL
V
S
− 2.07 V
S
− 1.75 V
S
− 1.62 V
Load is 127 Ω/83 Ω potential divider across
supply dc-coupled into 1 MΩ terminated
measurement equipment, outputs static.
LVDS CLOCK OUTPUTS
Output Frequency 637.5 MHz
Load is ac-coupled to measurement
equipment that provides 100 Ω differential
input termination.
Differential Output Voltage, V
OD
250 350 475 mV
Load is ac-coupled to measurement
equipment that provides 100 Ω differential
input termination. For differential amplitude,
see Figure 3.
Delta V
OD
25 mV
Load is ac-coupled to measurement
equipment that provides 100 Ω differential
input termination.
Duty Cycle 45 55 %
Load is ac-coupled to measurement
equipment that provides 100 Ω differential
input termination.
Output Offset Voltage, V
OS
1.125 1.25 1.375 V
Load is dc-coupled to a 100 Ω differential
resistor into 1 MΩ terminated measurement
equipment, outputs static.
Delta V
OS
25 mV
Load is dc-coupled to a 100 Ω differential
resistor into 1 MΩ terminated measurement
equipment, outputs static.
Short-Circuit Current, I
SA
, I
SB
13 24 mA
Load is dc-coupled to a 100 Ω differential
resistor into 1 MΩ terminated measurement
equipment, output shorted to GND.
CMOS CLOCK OUTPUTS
Output Frequency 200 MHz
Output High Voltage, V
OH
V
S
− 0.15 V Sourcing 1.0 mA current, outputs static.
Output Low Voltage, V
OL
0.1 V Sinking 1.0 mA current, outputs static.
Duty Cycle 45 55 %
Termination is high impedance active probe;
total C
LOAD
= 5 pF, R
LOAD
= 20 kΩ.