AD9520-5
CLOCK INPUTS
Table 3.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
Differential input
CLOCK INPUTS (CLK, CLK)
Input Frequency
01
01
2.4
1.6
GHz
GHz
High frequency distribution (VCO divider)
Distribution only (VCO divider bypassed); this is the
frequency range supported by the channel divider
Input Sensitivity, Differential
Input Level, Differential
150
mV p-p
V p-p
Measured at 2.4 GHz; jitter performance is improved with
slew rates > 1 V/ns
Larger voltage swings can turn on the protection diodes
and can degrade jitter performance
2
Input Common-Mode Voltage, VCM
Input Common-Mode Range, VCMR
Input Sensitivity, Single-Ended
Input Resistance
1.3
1.3
1.57
1.8
1.8
V
V
Self-biased; enables ac coupling
With 200 mV p-p signal applied; dc-coupled
CLK ac-coupled; CLK ac-bypassed to RF ground
Self-biased
150
4.7
2
mV p-p
kΩ
pF
3.9
5.7
Input Capacitance
1 Below about 1 MHz, the input should be dc-coupled. Care should be taken to match VCM
.
CLOCK OUTPUTS
Table 4.
Parameter
Min
Typ
Max
Unit Test Conditions/Comments
Termination = 50 Ω to VS_DRV − 2 V
Differential (OUT, OUT)
LVPECL CLOCK OUTPUTS
OUT0, OUT1, OUT2, OUT3,
OUT4, OUT5, OUT6, OUT7,
OUT8, OUT9, OUT10, OUT11
Output Frequency, Maximum
2400
MHz Using direct to output; see Figure 17
(higher frequencies are possible, but
amplitude will not meet the VOD
specification); the maximum output
frequency is limited by the maximum
frequency at the CLK inputs
Output High Voltage, VOH
Output Low Voltage, VOL
Output Differential Voltage, VOD 660
CMOS CLOCK OUTPUTS
VS_DRV − 1.07
VS_DRV − 1.95
VS_DRV − 0.96
VS_DRV − 1.79
820
VS_DRV − 0.84
VS_DRV − 1.64
950
V
V
mV
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
0.1
0.5
0.6
MHz See Figure 18
Output Voltage High, VOH
Output Voltage Low, VOL
Output Voltage High, VOH
Output Voltage Low, VOL
Output Voltage High, VOH
Output Voltage Low, VOL
VS − 0.1
V
V
V
V
V
V
@ 1 mA load, VS_DRV = 3.3 V/2.5 V
@ 1 mA load, VS_DRV = 3.3 V/2.5 V
@ 10 mA load, VS_DRV = 3.3 V
@ 10 mA load, VS_DRV = 3.3 V
@ 10 mA load, VS_DRV = 2.5 V
@ 10 mA load, VS_DRV = 2.5 V
2.7
1.8
Rev. 0 | Page 7 of 80