MAX1471 Maxim Integrated Products, MAX1471 Datasheet - Page 6

• Manufacturer Part Number: MAX1471
• Description: 3V/5V ASK/FSK Superheterodyne Receiver
• Manufacturer: Maxim Integrated Products

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