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315MHz Low-Power, +3V Superheterodyne
Receiver
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, all RF inputs and outputs are referenced to 50 ? , V DD = +3.3V, T A = +25 ° C, f RFIN = 315MHz, unless oth-
erwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Noise Figure
Power Gain
NF LNA
2.0
16
dB
dB
MIXER
Input Impedance
S11 MIX
Normalized to 50 ?
0.25 -
j2.4
Input-Referred 3rd-Order
Intercept
Output Impedance
IIP3 MIX
Z OUT _ MIX
-18
330
dBm
?
Image Rejection
Noise Figure
Conversion Gain
NF MIX
f RFIN = 315MHz, f RF _ IMAGE = 293.6MHz (Note 4)
f RFIN = 433.92MHz, f RF _ IMAGE = 412.52MHz
330 ? IF filter load
40
53
39
16
13
dB
dB
dB
INTERMEDIATE-FREQUENCY DEMODULATOR BLOCK
Input Impedance
Operating Frequency
RSSI Linearity
RSSI Dynamic Range
RSSI Level
Z IN _ IF
f IF
P RFIN < -120dBm
P RFIN > -50dBm
330
10.7
± 1
65
1.2
2.0
?
MHz
dB
dB
V
DATA FILTER
Maximum Bandwidth
BW DF
100
kHz
DATA SLICER
Comparator Bandwidth
Maximum Load Capacitance
BW CMP
C LOAD
100
10
kHz
pF
CRYSTAL OSCILLATOR
Reference Frequency
f REF
4.7547
MHz
Note 1: Parts are production tested at T A = +25 ° C; Min and Max values are guaranteed by design and characterization.
Note 2: BER = 2E-3, Manchester encoded, data rate = 4kbps, IF bandwidth = 350kHz.
Note 3: Input impedance is measured at the LNAIN pin. Note that the impedance includes the 15nH inductive degeneration con-
nected from the LNASRC.
Note 4: Guaranteed by production test.
_______________________________________________________________________________________
3
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