ICS844002I-01 Datasheet, PDF (4/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
NOTE: Characterized using an 18pF parallel resonant crystal.
ICS844002I-01
FEMTOCLOCKS™ CRYSTAL-TO-
LVDS FREQUENCY SYNTHESIZER
Minimum Typical Maximum
Fundamental
22.4
25
27.2
50
7
1
Units
MHz
Ω
pF
mW
TABLE 5. AC CHARACTERISTICS, V_DD = V_DDA = V_DDO = 2.5V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical
F_SEL[1:0] = 00
140
f_OUT
Output Frequency
F_SEL[1:0] = 01
112
F_SEL[1:0] = 10
56
tsk(o) Output Skew; NOTE 1, 2
5
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 3
156.25MHz, (1.875MHz - 20MHz)
125MHz, (1.875MHz - 20MHz)
62.5MHz,(1.875MHz - 20MHz)
0.41
0.44
0.47
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
250
48
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at V_DDO/2.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Please refer to the Phase Noise Plot.
Maximum
170
136
68
20
550
52
Units
MHz
MHz
MHz
ps
ps
ps
ps
ps
%
844002AGI-01
www.icst.com/products/hiperclocks.html
4
REV. A JANUARY 5, 2006