Datasheet
AD9559 Data Sheet
Rev. C | Page 8 of 120
DISTRIBUTION CLOCK OUTPUTS
Table 8.
Parameter Min Typ Max Unit Test Conditions/Comments
HSTL MODE
Output Frequency
OUT0A,
OUT0A
and OUT0B,
OUT0B
0.262 1250 MHz
OUT1A,
OUT1A
and OUT1B,
OUT1B
0.302 1250 MHz
Rise/Fall Time (20% to 80%)
1
140 250 ps 100 Ω termination across the output pair
Duty Cycle
Up to f
OUT
= 700 MHz
44
48
53
%
Up to f
OUT
= 750 MHz 43 48 54 %
Up to f
OUT
= 1250 MHz 43 %
Differential Output Voltage Swing
700 925 1200 mV Magnitude of voltage across pins; output
driver static
Common-Mode Output Voltage 750 850 1000 mV Output driver static
Reference Input-to-Output Delay Variation
over Temperature
3.2 ps/°C HSTL mode; DPLL locked to same input
reference at all times; stable system clock
source (non-XTAL)
Static Phase Offset Variation from Active
Reference to Output over Voltage
Extremes
0.875 ps/mV Valid for HSTL, LVDS, and 1.8 V CMOS output
driver modes
LVDS MODE
Output Frequency
OUT0A,
OUT0A
and OUT0B,
OUT0B
0.262 1250 MHz
OUT1A,
OUT1A
and OUT1B,
OUT1B
0.302 1250 MHz
Rise/Fall Time (20% to 80%)
1
185 280 ps 100 Ω termination across the output pair
Duty Cycle
Up to f
OUT
= 750 MHz 43 48 53 %
Up to f
OUT
= 800 MHz 42.5 48 53.5 %
Up to f
OUT
= 1250 MHz 43 %
Differential Output Voltage Swing
Balanced, V
OD
247 454 mV Voltage swing between output pins; output
driver static
Unbalanced, ΔV
OD
50 mV Absolute difference between voltage swing of
normal pin and inverted pin; output driver static
Offset Voltage
Common Mode, V
OS
1.125 1.25 1.375 V Output driver static
Common-Mode Difference, ΔV
OS
50 mV Voltage difference between pins; output driver
static
Short-Circuit Output Current 10 24 mA Output driver static
CMOS MODE
Output Frequency
1.8 V Supply
OUT0A,
OUT0A
and OUT0B,
OUT0B
0.262 250 MHz 10 pF load
OUT1A,
OUT1A
and OUT1B,
OUT1B
0.302 250 MHz 10 pF load
3.3 V Supply (OUT0A and OUT1A)
Strong Drive Strength Setting
OUT0A,
OUT0A
0.262 250 MHz 10 pF load
OUT1A,
OUT1A
0.302
250
MHz
10 pF load
Weak Drive Strength Setting
OUT0A,
OUT0A
0.262 25 MHz 10 pF load
OUT1A,
OUT1A
0.302 25 MHz 10 pF load