Rainbow Electronics MAX7042 - Manual (Page 6)

MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
6 _______________________________________________________________________________________
SYSTEM GAIN vs. IF FREQUENCY
(1x I LNA )
MAX7042 toc13
IF FREQUENCY (MHz)
SYSTEM GAIN (dB)
25 20 15 10 5
0
10
20
30
40
50
-10
0 30
LOWER SIDEBAND
UPPER SIDEBAND
FROM RFIN
TO MIXOUT
f RF = 433.92MHz 45dB IMAGE
REJECTION
SYSTEM GAIN vs. IF FREQUENCY
(2x I LNA )
MAX7042 toc14
IF FREQUENCY (MHz)
SYSTEM GAIN (dB)
25 20 15 10 5
0
10
20
30
40
50
60
-10
0 30
LOWER SIDEBAND
UPPER SIDEBAND
FROM RFIN
TO MIXOUT
f RF = 433.92MHz
45dB IMAGE
REJECTION
IMAGE REJECTION (dB)
10
20
30
40
50
60
0
IMAGE REJECTION vs. TEMPERATURE
(1x I LNA )
MAX7042 toc15
TEMPERATURE ( °C)
110 85 60 35 10 -15 -40
f RF = 433.92MHz
f RF = 315MHz
IMAGE REJECTION (dB)
10
20
30
40
50
60
0
IMAGE REJECTION vs. TEMPERATURE
(2x I LNA )
MAX7042 toc16
TEMPERATURE ( °C)
110 85 60 35 10 -15 -40
f RF = 433.92MHz
f RF = 315MHz
1 10 100
NORMALIZED IF GAIN
vs. IF FREQUENCY
MAX7042 toc17
IF FREQUENCY (MHz)
NORMALIZED IF GAIN (dB)
-18
-9
-6
-15
-12
-3
0
S11 vs. RF FREQUENCY
MAX7042 toc18
RF FREQUENCY (MHz)
S11 (dB)
850 700 550 400 250
-12
-8
-4
0
-16
100 1000
433.92MHz
Typical Operating Characteristics (continued)
(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.)