DS4000 Digitally Controlled TCXO
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AC ELECTRICAL CHARACTERISTICS: TCXO
(VCC = 5V ±5%, over the operating temperature range.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
F1
Output Frequency
F2
CMOS (Note 5)
10
20
MHz
Frequency Stability vs.
Temperature
DF/TA
-1.0
+1.0
ppm
Frequency Stability vs. Voltage
DF/V
(Note 6)
±1.0
ppm/V
Frequency Stability vs. Aging
DF/Yr
±1.0
ppm/Yr
F1, F2 Rise and Fall Time, 10% to
90%
tR, tF
4
ns
Max Output Capacitive Load
CL
10
pF
Duty Cycle
tW / t
40
50
60
%
10Hz
-85
100Hz
-115
1kHz
-129
10kHz
-134
Phase Noise f1 Output (Note 7)
fN
100kHz
-139
dBc/Hz
Note 5: F1 is the base frequency as defined by the package markings. F2 is a programmable frequency output. The output frequency of F2 is
derived from the base frequency, F1, by programming the F2 frequency select register and duty cycle (DC) bit in the TCXO control
register. The minimum output frequency is F1 / (2
8 + 1) with DC = 0 and f1 / [2 x (28 + 1)] with DC = 1.
Note 6: First year typical.
Note 7: 16.384MHz, 5V, +25°C with one of the two outputs enabled.