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Low-Cost, 315MHz and 433.92MHz
ASK Transceiver with Fractional-N PLL
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50 Ω system impedance, V PAVDD = V AVDD = V DVDD = V HVIN = +2.1V to +3.6V, f RF = 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
PHASE-LOCKED LOOP
Transmit VCO Gain
Transmit PLL Phase Noise
Receive VCO Gain
Receive PLL Phase Noise
Loop Bandwidth
Reference Frequency Input
Level
K VCO
10kHz offset, 200kHz loop BW
1MHz offset, 200kHz loop BW
10kHz offset, 500kHz loop BW
1MHz offset, 500kHz loop BW
Transmit PLL
Receive PLL
340
-68
-98
340
-80
-90
200
500
0.5
MHz/V
dBc/Hz
MHz/V
dBc/Hz
kHz
V P-P
LOW-NOISE AMPLIFIER/MIXER (Note 8)
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
IIP3
High-gain state
Low-gain state
-42
-6
dBm
Mixer-Output Impedance
330
LO Signal Feedthrough to
Antenna
RSSI
Input Impedance
-100
330
dBm
Operating Frequency
3dB Bandwidth
Gain
f IF
10.7
10
15
MHz
MHz
mV/dB
ANALOG BASEBAND
Maximum Data-Filter Bandwidth
Maximum Data-Slicer Bandwidth
Maximum Peak-Detector
Bandwidth
50
100
50
kHz
kHz
kHz
Maximum Data Rate
Manchester coded
Nonreturn to zero (NRZ)
33
66
kbps
4
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