Datasheet

AD9559 Data Sheet
Rev. C | Page 6 of 120
Parameter Min Typ Max Unit Test Conditions/Comments
CRYSTAL RESONATOR PATH
Crystal Resonator Frequency Range 10 50 MHz Fundamental mode, AT cut crystal
Maximum Crystal Motional Resistance 100 Ω
REFERENCE INPUTS
Table 5.
Parameter Min Typ Max Unit Test Conditions/Comments
DIFFERENTIAL OPERATION
Frequency Range The reference input divide-by-2 block must be engaged
for f
IN
> 705 MHz
Sinusoidal Input
10
750
MHz
LVPECL Input 0.002 1250 MHz
LVDS Input 0.002 750 MHz
Minimum Input Slew Rate 40 V/μs Minimum limit imposed for jitter performance
Common-Mode Input Voltage
AC-Coupled
1.9
2
2.1
V
Internally generated
DC-Coupled 1.0 2.4 V
Differential Input Voltage Sensitivity mV Minimum differential voltage across pins required to
ensure switching between logic levels; instantaneous
voltage on either pin must not exceed the supply rails
f
IN
< 800 MHz 240 mV
f
IN
= 800 MHz to 1050 MHz
320
mV
f
IN
= 1050 MHz to 1250 MHz 400 mV
Differential Input Voltage Hysteresis 55 100 mV
Input Resistance 21 kΩ
Input Capacitance 3 pF
Minimum Pulse Width High
LVPECL 390 ps
LVDS 640 ps
Minimum Pulse Width Low
LVPECL 390 ps
LVDS 640 ps
SINGLE-ENDED OPERATION
Frequency Range (CMOS) 0.002 300 MHz
Minimum Input Slew Rate 40 V/μs Minimum limit imposed for jitter performance
Input Voltage High (V
IH
)
1.2 V to 1.5 V Threshold Setting 1.0 V
1.8 V to 2.5 V Threshold Setting 1.4 V
3.0 V to 3.3 V Threshold Setting 2.0 V
Input Voltage Low (V
IL
)
1.2 V to 1.5 V Threshold Setting 0.35 V
1.8 V to 2.5 V Threshold Setting 0.5 V
3.0 V to 3.3 V Threshold Setting 1.0 V
Input Resistance 47 kΩ
Input Capacitance 3 pF
Minimum Pulse Width High 1.5 ns
Minimum Pulse Width Low
1.5
ns