Datasheet

AD9522-1
Rev. 0 | Page 7 of 84
CLOCK INPUTS
Table 3.
Parameter Min Typ Max Unit Test Conditions/Comments
CLOCK INPUTS (CLK, CLK)
Differential input
Input Frequency 0
1
2.4 GHz High frequency distribution (VCO divider)
0
1
1.6 GHz
Distribution only (VCO divider bypassed); this is the
frequency range supported by the channel divider
Input Sensitivity, Differential 150 mV p-p
Measured at 2.4 GHz; jitter performance is improved with
slew rates > 1 V/ns
Input Level, Differential 2 V p-p
Larger voltage swings can turn on the protection diodes
and can degrade jitter performance
Input Common-Mode Voltage, V
CM
1.3 1.57 1.8 V Self-biased; enables ac coupling
Input Common-Mode Range, V
CMR
1.3 1.8 V With 200 mV p-p signal applied; dc-coupled
Input Sensitivity, Single-Ended 150 mV p-p
CLK ac-coupled; CLK
ac-bypassed to RF ground
Input Resistance 3.9 4.7 5.7 kΩ Self-biased
Input Capacitance 2 pF
1
Below about 1 MHz, the input should be dc-coupled. Care should be taken to match V
CM
.
CLOCK OUTPUTS
Table 4.
Parameter Min Typ Max Unit Test Conditions/Comments
LVDS CLOCK OUTPUTS Termination = 100 Ω across differential pair
OUT0, OUT1, OUT2, OUT3, OUT4, OUT5,
OUT6, OUT7, OUT8, OUT9, OUT10, OUT11
Differential (OUT, OUT
)
Output Frequency, Maximum 800 MHz
The AD9522 outputs toggle at higher frequencies,
but the output amplitude may not meet the V
OD
specification
Output Differential Voltage, V
OD
247 360 454 mV
V
OH
− V
OL
measurement across a differential pair
at the default amplitude setting with output
driver not toggling; see Figure 21 for variation
over frequency
Delta V
OD
25 mV
This is the absolute value of the difference
between V
OD
when the normal output is high vs.
when the complementary output is high
Output Offset Voltage, V
OS
1.125 1.25 1.375 V (V
OH
+ V
OL
)/2 across a differential pair
Delta V
OS
25 mV
This is the absolute value of the difference
between V
OS
when the normal output is high vs.
when the complementary output is high
Short-Circuit Current, I
SA
, I
SB
14 24 mA Output shorted to GND
CMOS CLOCK OUTPUTS
OUT0A, OUT0B, OUT1A, OUT1B, OUT2A,
OUT2B, OUT3A, OUT3B, OUT4A, OUT4B,
OUT5A, OUT5B, OUT6A, OUT6B, OUT7A,
OUT7B, OUT8A, OUT8B, OUT9A, OUT9B,
OUT10A, OUT10B, OUT11A, OUT11B
Single-ended; termination = 10 pF
Output Frequency 250 MHz See Figure 22
Output Voltage High, V
OH
VS − 0.1 V @ 1 mA load
Output Voltage Low, V
OL
0.1 V @ 1 mA load
Output Voltage High, V
OH
2.7 V @ 10 mA load
Output Voltage Low, V
OL
0.5 V @ 10 mA load