Typical operating characteristics (continued) – Rainbow Electronics MAX1471 User Manual
Page 6
MAX1471
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
6
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0
0.6
0.3
1.2
0.9
1.8
1.5
2.1
-90
-50
-70
-30
-10
10
RSSI AND DELTA vs. IF INPUT POWER
MAX1471 toc10
RF INPUT POWER (dBm)
RSSI (V)
-3.5
-1.5
-2.5
0.5
-0.5
2.5
1.5
3.5
DELTA (%)
RSSI
DELTA
0
0.4
0.8
1.2
1.6
2.0
10.4
10.5
10.7
10.6
10.8
10.9
11.0
FSK DEMODULATOR OUTPUT
vs. IF FREQUENCY
MAX1471 toc11
IF FREQUENCY (MHz)
FSK DEMODULATOR OUTPUT (V)
-10
10
0
30
20
50
40
60
0
10
15
5
20
25
30
SYSTEM VOLTAGE GAIN
vs. IF FREQUENCY
MAX1471 toc12
IF FREQUENCY (MHz)
SYSTEM GAIN (dB)
45dB IMAGE
REJECTION
UPPER SIDEBAND
LOWER SIDEBAND
FROM RFIN
TO MIXOUT
f
RF
= 434MHz
38
40
44
42
46
48
-40
10
-15
35
60
85
110
IMAGE REJECTION
vs. TEMPERATURE
MAX1471 toc13
TEMPERATURE (
°C)
IMAGE REJECTION (dB)
f
RF
= 315MHz
f
RF
= 434MHz
5
-20
1
10
100
NORMALIZED IF GAIN
vs. IF FREQUENCY
-15
MAX1471 toc14
IF FREQUENCY (MHz)
NORMALIZED IF GAIN (dBm)
-10
-5
0
10dB/
div
START: 50MHz
STOP: 1GHz
S11 LOG-MAGNITUDE PLOT WITH
MATCHING NETWORK OF RFIN (434MHz)
MAX1471 toc15
0dB
0dB
434MHz
-16.4dB
S11 SMITH CHART OF RFIN (434MHz)
MAX1471 toc16
500MHz
200MHz
Typical Operating Characteristics (continued)
(Typical Application Circuit, AV
DD
= DV
DD
= HV
IN
= +3.0V, f
RF
= 434MHz, T
A
= +25°C, unless otherwise noted.)