Rainbow-electronics DS1087L Manual de usuario Pagina 3

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DS1087L
3.3V Spread-Spectrum EconOscillator
_____________________________________________________________________ 3
MASTER OSCILLATOR CHARACTERISTICS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITION
MIN TYP MAX
UNITS
Master Oscillator Range
Available
f
0
33.3 66.6
MHz
Master Oscillator Frequency
Tolerance
f
0
f
0
V
CC
= 3.3V, T
A
= +25°C (Note 2)
-0.5 +0.5
%
Voltage Frequency
Variation
f
V
f
0
Over voltage range, T
A
= +25°C (Note 3)
-0.75 +0.75
%
Temperature Frequency Variation
f
T
f
0
0°C to +70°C, V
CC
= 3.3V (Note 4)
-0.5 +0.5
%
Temperature Frequency Variation
f
T
f
0
-40°C to +85°C, V
CC
= 3.3V (Note 4)
-1.5 +0.5
%
Prescaler bit J0 = 1 (Note 5) 2
Dither Frequency Range
Prescaler bit J0 = 0 (Note 5) 4
%
Dither Rate
f
0
/ 2048
Hz
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
Frequency Stable After
PRESCALER Change
1
period
Power-Up Time
t
POR
+
t
STAB
(Note 6) 0.1 0.5 ms
Enable of OUT After Exiting
Power-Down Mode
t
STAB
500 µs
OUT Disabled After Entering
Power-Down Mode
t
PDN
1ms
Load Capacitance C
L
(Note 7) 15 50 pF
Output Duty Cycle (OUT) T
A
= +25°C 45 55 %
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