MAX1471_10 Datasheet, PDF (6/26 Pages) Maxim Integrated Products – 315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver

315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
Typical Operating Characteristics (continued)
(Typical Application Circuit, V_AVDD = V_DVDD = V_HVIN = +3.0V, f_RF = 434MHz, T_A = +25°C, unless otherwise noted.)
RSSI AND DELTA vs. IF INPUT POWER
2.1
3.5 ^{MAX1471 toc10}
1.8
2.5
RSSI
1.5
1.5
1.2
0.5
0.9
-0.5
0.6
DELTA
-1.5
0.3
-2.5
0
-90
-70 -50 -30 -10
RF INPUT POWER (dBm)
-3.5
10
IMAGE REJECTION
vs. TEMPERATURE
48
f_RF = 315MHz
46
44
f_RF = 434MHz
42
FSK DEMODULATOR OUTPUT
vs. IF FREQUENCY
2.0
1.6
1.2
0.8
0.4
0
10.4
10.5 10.6 10.7 10.8
IF FREQUENCY (MHz)
10.9 11.0
NORMALIZED IF GAIN
vs. IF FREQUENCY
5
60
50
40
30
20
10
0
-10
0
SYSTEM VOLTAGE GAIN
vs. IF FREQUENCY
UPPER SIDEBAND
45dB IMAGE
REJECTION
FROM RFIN
TO MIXOUT
f_RF = 434MHz
LOWER SIDEBAND
5 10 15 20 25 30
IF FREQUENCY (MHz)
S11 LOG-MAGNITUDE PLOT WITH
MATCHING NETWORK OF RFIN (434MHz)
0
10dB/
div
-5
0dB
0dB
-10
40
38
-40 -15
10 35 60 85 110
TEMPERATURE (°C)
-15
-20
1
10
100
IF FREQUENCY (MHz)
434MHz
-16.4dB
START: 50MHz
STOP: 1GHz
S11 SMITH CHART OF RFIN (434MHz)
MAX1471 toc16
500MHz
200MHz
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