Low-Cost, 308MHz, 315MHz, and 433.92MHz
FSK Transceiver with Fractional-N PLL
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50 ? system impedance, V PAVDD = V AVDD = V DVDD = V HVIN = +2.1V to +3.6V, f RF = 308MHz, 315MHz. or
433.92MHz, T A = -40°C to +125°C, unless otherwise noted. Typical values are at V PAVDD = V AVDD = V DVDD = V HVIN = +2.7V,
T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Frequency Input Level
LOW-NOISE AMPLIFIER/MIXER (Note 7)
0.5
V P-P
LNA Input Impedance
Z INLNA
Normalized to 50 ?
f RF = 315MHz
f RF = 434MHz
1 - j4.7
1 - j3.3
Voltage-Conversion Gain
High-gain state
Low-gain state
f RF = 315MHz
f RF = 434MHz
f RF = 315MHz
f RF = 434MHz
50
45
13
9
dB
Input-Referred 3rd-Order
Intercept Point
Mixer Output Impedance
LO Signal Feedthrough to
Antenna
IIP3
High-gain state
Low-gain state
-42
-6
330
-100
dBm
?
dBm
RSSI
Input Impedance
330
?
Operating Frequency
3dB Bandwidth
Gain
f IF
10.7
10
15
MHz
MHz
mV/dB
FSK DEMODULATOR
Conversion Gain
ANALOG BASEBAND
Maximum Data Filter Bandwidth
Maximum Data Slicer Bandwidth
Maximum Peak Detector
Bandwidth
2.0
50
100
50
mV/kHz
kHz
kHz
kHz
Maximum Data Rate
Manchester coded
Nonreturn to zero (NRZ)
33
66
kbps
CRYSTAL OSCILLATOR
Crystal Frequency
Frequency Pulling by V DD
Crystal Load Capacitance
f XTAL
(Note 6)
(f RF - 10.7)
/ 24
2
4.5
MHz
ppm/V
pF
4
_______________________________________________________________________________________
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