Datasheet

AD9512
Rev. A | Page 4 of 48
SPECIFICATIONS
Typical (Typ) is given for V
S
= 3.3 V ± 5%; T
A
= 25°C, R
SET
= 4.12 kΩ, unless otherwise noted. Minimum (Min) and Maximum (Max)
values are given over full V
S
and T
A
(−40°C to +85°C) variation.
CLOCK INPUTS
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
CLOCK INPUTS (CLK1, CLK2)
1
Input Frequency 0 1.6 GHz
Input Sensitivity 150
2
mV p-p
Jitter performance can be improved with higher slew
rates (greater swing).
Input Level 2
3
V p-p
Larger swings turn on the protection diodes and can
degrade jitter performance.
Input Common-Mode Voltage, V
CM
1.5 1.6 1.7 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 CLK2 ac-coupled; CLK2B ac bypassed to RF ground.
Input Resistance 4.0 4.8 5.6 kΩ Self-biased.
Input Capacitance 2 pF
1
CLK1 and CLK2 are electrically identical; each can be used as either differential or single-ended input.
2
With a 50 Ω termination, this is −12.5 dBm.
3
With a 50 Ω termination, this is +10 dBm.
CLOCK OUTPUTS
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL CLOCK OUTPUTS Termination = 50 Ω to V
S
− 2 V
OUT0, OUT1, OUT2; Differential Output level 3Dh (3Eh) (3Fh)<3:2> = 10b
Output Frequency 1200 MHz See Figure 14
Output High Voltage (V
OH
) V
S
− 1.22 V
S
− 0.98 V
S
− 0.93 V
Output Low Voltage (V
OL
) V
S
− 2.10 V
S
− 1.80 V
S
− 1.67 V
Output Differential Voltage (V
OD
) 660 810 965 mV
LVDS CLOCK OUTPUTS Termination = 100 Ω differential; default
OUT3, OUT4; Differential
Output level 40h (41h)<2:1> = 01b
3.5 mA termination current
Output Frequency 800 MHz See Figure 15
Differential Output Voltage (V
OD
) 250 360 450 mV
Delta V
OD
25 mV
Output Offset Voltage (V
OS
) 1.125 1.23 1.375 V
Delta V
OS
25 mV
Short-Circuit Current (I
SA
, I
SB
) 14 24 mA Output shorted to GND
CMOS CLOCK OUTPUTS
OUT3, OUT4
Single-ended measurements;
B outputs: inverted, termination open
Output Frequency 250 MHz With 5 pF load each output; see Figure 16
Output Voltage High (V
OH
) V
S
− 0.1 V @ 1 mA load
Output Voltage Low (V
OL
) 0.1 V @ 1 mA load