ICS844003I-01 Datasheet, PDF (6/12 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844003I-01
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
FREQUENCY SYNTHESIZER
TABLE 4C. LVDS DC CHARACTERISTICS, V_DD = V_DDA = V_{DDO_A} = V_{DDO_B} = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical
V_OD
Δ V_OD
V_OS
Δ V_OS
Differential Output Voltage
V Magnitude Change
OD
Offset Voltage
V_OS Magnitude Change
350
0
1.35
0
Maximum
50
50
Units
mV
mV
V
mV
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Frequency
FB_DIV = ÷25
FB_DIV = ÷32
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
NOTE: Characterized using an 18pF parallel resonant crystal.
Minimum Typical Maximum
Fundamental
19.6
27.2
15.313
21.25
50
7
1
Units
MHz
MHz
Ω
pF
mW
TABLE 6. AC CHARACTERISTICS, V_DD = V_DDA = V_{DDO_A} = V_{DDO_B} = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
Output Divider = ÷1
490
680
Output Divider = ÷2
245
340
f_OUT
Output Frequency Range
Output Divider = ÷3
Output Divider = ÷4
163.33
122.5
226.67
170
Output Divider = ÷5
98
136
Output Divider = ÷8
61.25
85
tsk(b) Bank Skew, NOTE 1
8
Outputs @ Same Frequency
11
tsk(o) Output Skew; NOTE 2, 4
Outputs @ Different Frequencies
109
625MHz (1.875MHz - 20MHz)
0.53
tjit(Ø)
RMS Phase Jitter (Random);
NOTE 3
312.5MHz (1.875MHz - 20MHz)
156.25MHz (1.875MHz - 20MHz)
0.53
0.56
125MHz (1.875MHz - 20MHz)
0.58
t_R / t_F
Output Rise/Fall Time
20% to 80%
325
odc
Output Duty Cycle
50
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: Please refer to the Phase Noise Plots.
NOTE 4: This parameter is defined in accordance with JEDEC Standard 65.
Units
MHz
MHz
MHz
MHz
MHz
MHz
ps
ps
ps
ps
ps
ps
ps
ps
%
844003AGI-01
www.icst.com/products/hiperclocks.html
6
REV. A MAY 31, 2005