300MHz to 450MHz Frequency-Programmable
ASK/FSK Transmitter
_______________________________________________________________________________________   3
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, 50& system impedance, tuned for 315MHz to 433.92MHz operation, V
AVDD
= V
DVDD
= V
PAVDD
= +2.1V
to +3.6V, f
RF
= 300MHz to 450MHz, f
CRYSTAL
= 16MHz, T
A
= -40癈 to +125癈, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
PAVDD
= +2.7V, T
A
= +25癈, unless otherwise noted. All min and max values are 100% tested at T
A
= +125癈, and
guaranteed by design and characterization over temperature, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL CHARACTERISTICS
Frequency Range
300
450
MHz
ENABLE transition low-to-high, frequency
settled to within 50kHz of the desired carrier
120
Power-On Time
t
ON
ENABLE transition low-to-high, frequency
settled to within 5kHz of the desired carrier
260
Manchester encoded
50
ASK mode
Nonreturn-to-Zero
100
Manchester encoded
50
Maximum Data Rate
FSK mode
Nonreturn-to-Zero
100
kbps
Frequency Switching Time
Time from end of SPI write to frequency
settled to within 5kHz of desired carrier
70
PHASE-LOCKED LOOP (PLL)
VCO Gain
K
VCO
320
MHz/V
10kHz offset
-78
f
RF
 = 315MHz
1MHz offset
-98
10kHz offset
-73
PLL Phase Noise
f
RF
 = 433.92MHz
1MHz offset
-98
dBc/Hz
Loop Bandwidth
300
kHz
Reference Frequency Input Level
500
mV
P-P
Frequency-Divider Range
19
28
Frequency Deviation (FSK)
?
?00
kHz
CRYSTAL OSCILLATOR
Crystal Frequency
f
XTAL
10.71
16
23.68
MHz
Frequency Pulling by V
DD
4
ppm/V
Crystal Load Capacitance
(Note 4)
10
pF
POWER AMPLIFIER (PA)
T
A
 = +25癈 (Note 3)
3.8
9.2
16.4
T
A
 = +125癈, V
AVDD
 = V
DVDD
 = V
PAVDD
 =
+2.1V
2.4
5.2
Output Power (Note 1)
P
OUT
T
A
 = -40癈, V
AVDD
 = V
DVDD
 = V
PAVDD
 =
+3.6V (Note 3)
12.6
17.0
dBm
Modulation Depth
71
dB
f
RF
 = 315MHz
-29
Maximum Carrier Harmonics
With output matching
network
f
RF
 = 433.92MHz
-44
dBc
Reference Spur
-45
dBc
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