Rev A 06/10/15 8 FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
844003-01 DATA SHEET
AC Electrical Characteristics
Table 6. AC Characteristics, V
DD
= V
DDA
= V
DDO_A
= V
DDO_B
= 3.3V ± 5%, T
A
= 0°C to 70°C
NOTE 1: Defined as skew within a bank of outputs at the same voltages and with equal load conditions.
NOTE 2: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at the output differential cross points.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 4: Characterized using output dividers 1, 2, 4, 8.
NOTE 5: Refer to the Phase Noise Plots.
Parameter Symbol Test Conditions Minimum Typical Maximum Units
f
OUT
Output Frequency Range
Output Divider = ÷1 490 680 MHz
Output Divider = ÷2 245 340 MHz
Output Divider = ÷3 163.33 226.67 MHz
Output Divider = ÷4 122.5 170 MHz
Output Divider = ÷5 98 136 MHz
Output Divider = ÷8 61.25 85 MHz
tsk(b) Bank Skew; NOTE 1 33 ps
tsk(o) Output Skew
NOTE 2, 3 Outputs @ Same Frequency 75 ps
NOTE 2, 3, 4 Outputs @ Different Frequencies 170 ps
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 5
625MHz (1.875MHz – 20MHz) 0.53 ps
312.5MHz (1.875MHz – 20MHz): 0.53 ps
156.25MHz (1.875MHz – 20MHz) 0.56 ps
125MHz (1.875MHz – 20MHz) 0.58 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 200 450 ps
odc Output Duty Cycle
Output Divider ÷1 47 53 %
Output Divider = ÷1 43 57 %
