11
9152BINDCO02/10
ATA8743
Phase noise of phase comparator
Referred to f
PC
 = f
XT0,
25 kHz distance to carrier
116
110
dBc/Hz
In-loop phase noise PLL
25 kHz distance to carrier
80
74
dBc/Hz
Phase noise VCO
at 1 MHz
at 36 MHz
89
120
86
117
dBc/Hz
dBc/Hz
Frequency range of VCO
f
VCO
868
928
MHz
Clock output frequency (CMOS
microcontroller compatible)
f
0
/256
MHz
Voltage swing at pin CLK
C
Load
d 10 pF
V
0h
V
0l
V
S
?0.8
V
S
?0.2
V
V
Series resonance R of the crystal
Rs
110
?/DIV>
Capacitive load at pin XT0
7
pF
FSK modulation frequency rate
Duty cycle of the modulation signal = 50%
0
32
kHz
ASK modulation frequency rate
Duty cycle of the modulation signal = 50%
0
32
kHz
ENABLE input
Low level input voltage
High level input voltage
Input current high
V
Il
V
Ih
I
In
1.7
0.25
20
V
V
PA_ENABLE input
Low level input voltage
High level input voltage
Input current high
V
Il
V
Ih
I
In
1.7
0.25
V
S
(1)
5
V
V
7.   Electrical Characteristics (Continued)
V
S
 = 2.0V to 4.0V, T
amb
 = 25癈 unless otherwise specified.
Typical values are given at V
S
 = 3.0V and T
amb
 = 25癈. All parameters are referred to GND (pin 7).
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Note:
1.  If V
S
 is higher than 3.6V, the maximum voltage will be reduced to 3.6V.
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