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MAX1473
315MHz/433MHz ASK Superheterodyne
Receiver with Extended Dynamic Range
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, V DD = 3.0V to 3.6V, all RF inputs are referenced to 50 ? , f RF = 315MHz, T A = -40°C to +85°C, unless
otherwise noted. Typical values are at V DD = 3.3V and T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LO Signal Feedthrough to
Antenna
-80
dBm
Noise Figure
NF LNA
2
dB
LNA IN LOW-GAIN MODE
Input Impedance (Note 4)
1dB Compression Point
Input-Referred 3rd-Order
Intercept
LO Signal Feedthrough to
Antenna
Noise Figure
Power Gain
Z IN_LNA
P1dB LNA
IIP3 LNA
NF LNA
Normalized to
50 ?
f RF = 433MHz
f RF = 375MHz
f RF = 315MHz
1 - j3.4
1 - j3.9
1 - j4.7
-10
-7
-80
2
0
dBm
dBm
dBm
dB
dB
Voltage Gain Reduction
AGC enabled (depends on tank Q)
35
dB
MIXER
Input-Referred 3rd-Order
Intercept
Output Impedance
Noise Figure
Image Rejection
(not Including LNA Tank)
Conversion Gain
IIP3 MIX
Z OUT_MIX
NF MIX
f RF = 433MHz, V IRSEL = V DD
f RF = 375MHz, V IRSEL = V DD /2
f RF = 315MHz, V IRSEL = 0V
330 ? IF filter load
-18
330
16
42
44
44
13
dBm
?
dB
dB
dB
INTERMEDIATE FREQUENCY (IF )
Input Impedance
Z IN_IF
330
?
Operating Frequency
3dB Bandwidth
RSSI Linearity
RSSI Dynamic Range
RSSI Level
RSSI Gain
AGC Threshold
f IF
Bandpass response
P RFIN < -120dBm
P RFIN > 0dBm, AGC enabled
LNA gain from low to high
LNA gain from high to low
10.7
20
± 0.5
80
1.15
2.35
14.2
1.45
2.05
MHz
MHz
dB
dB
V
mV/dB
V
4
Maxim Integrated
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