Datasheet

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 50Ω, 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
2dB
LNA IN LOW-GAIN MODE
f
RF
= 433MHz 1 - j3.4
f
RF
= 375MHz 1 - j3.9Input Impedance (Note 4) Z
IN_LNA
Normalized to
50Ω
f
RF
= 315MHz 1 - j4.7
1dB Compression Point P1dB
LNA
-10 dBm
Input-Referred 3rd-Order
Intercept
IIP3
LNA
-7 dBm
LO Signal Feedthrough to
Antenna
-80 dBm
Noise Figure NF
LNA
2dB
Power Gain 0dB
Voltage Gain Reduction AGC enabled (depends on tank Q) 35 dB
MIXER
Input-Referred 3rd-Order
Intercept
IIP3
MIX
-18 dBm
Output Impedance Z
OUT_MIX
330 Ω
Noise Figure NF
MIX
16 dB
f
RF
= 433MHz, V
IRSEL
= V
DD
42
f
RF
= 375MHz, V
IRSEL
= V
DD
/2 44
Image Rejection
(not Including LNA Tank)
f
RF
= 315MHz, V
IRSEL
= 0V 44
dB
Conversion Gain 330Ω IF filter load 13 dB
INTERMEDIATE FREQUENCY (IF)
Input Impedance Z
IN_IF
330 Ω
Operating Frequency f
IF
Bandpass response 10.7 MHz
3dB Bandwidth 20 MHz
RSSI Linearity ±0.5 dB
RSSI Dynamic Range 80 dB
P
RFIN
< -120dBm 1.15
RSSI Level
P
RFIN
> 0dBm, AGC enabled 2.35
V
RSSI Gain 14.2 mV/dB
LNA gain from low to high 1.45
AGC Threshold
LNA gain from high to low 2.05
V
MAX1473
4
Maxim Integrated