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308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50 ? system impedance, V AVDD = V DVDD = V HVIN = +2.4V to +3.6V, f RF = 308, 315, 418, and
433.92MHz; T A = -40°C to +125°C, unless otherwise noted. Typical values are at V AVDD = V DVDD = V HVIN = +3.0V,
f RF = 433.92MHz, P RFIN ≤ -80dBm, T A = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Frequency
f IF
10.7
MHz
RSSI Slope
10
16
21
mV/dB
FSK DEMODULATOR
Conversion Gain
1.1
2.1
3.0
mV/kHz
ANALOG BASEBAND
Maximum Peak-Detector Bandwidth
50
kHz
Maximum Data-Filter Bandwidth
Maximum Data-Slicer Bandwidth
Maximum Data Rate
BW DF
BW DS
Manchester coded
NRZ
50
100
33
66
kHz
kHz
kHz
CRYSTAL OSCILLATOR
Crystal Frequency
Crystal Load Capacitance
f XTAL
(f RF - 10.7)
/ 32
4.5
MHz
pF
Note 1: 0.2% BER, 4kbps, Manchester coded, 280kHz IF BW, ±50kHz frequency deviation.
Note 2: Input impedance is measured at the LNAIN pin. Note that the impedance at 315MHz includes the 3.9nH inductive degener-
ation from the LNA source to ground. The impedance at 433.92MHz includes a 0nH inductive degeneration connected from
the LNA source to ground. The equivalent input circuit is 47 ? in series with 3.2pF at 315MHz and 47 ? in series with 3.5pF
at 433.92MHz.
Note 3: The voltage conversion gain is measured with the LNA input matching inductor, the degeneration inductor, and the
LNA/mixer resonator in place, and does not include the IF filter insertion loss.
Typical Operating Characteristics
(Typical Application Circuit, V DD = 3.0V, f RF = 433.92MHz, IF BW = 280kHz, data rate = 4kbps Manchester encoded, frequency
deviation = ±50kHz, BER = 0.2%, T A = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(1x I LNA )
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(2x I LNA )
SUPPLY CURRENT vs. RF FREQUENCY
(1x I LNA )
7.2
7.0
+125°C
8.0
7.8
+125°C
7.0
6.8
6.8
6.6
6.4
6.2
+85°C
+25 ° C
7.6
7.4
7.2
7.0
6.8
+85°C
+25°C
6.6
6.4
6.2
+125°C
+85 ° C
+25 ° C
6.0
6.6
6.0
5.8
5.6
-40 ° C
6.4
6.2
-40°C
5.8
-40 ° C
5.4
6.0
5.6
2.4
2.7
3.0
3.3
3.6
2.4
2.7
3.0
3.3
3.6
300
325
350
375
400
425
450
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
RF FREQUENCY (MHz)
4
_______________________________________________________________________________________
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