Functional diagram – Rainbow Electronics MAX1471 User Manual
Page 9
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MAX1471
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
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9
FSK
DEMODULATOR
RSSI
Σ
90°
0°
VCO
DIVIDE
BY 32
PHASE
DETECTOR
CRYSTAL
OSCILLATOR
SERIAL INTERFACE,
CONTROL REGISTERS,
AND POLLING TIMER
LOOP
FILTER
LNA
3.0V
REG
3.0V
4
DFA
3
OPA+
2
DSA+
31 PDMINA
32 PDMAXA
1
DSA-
30 ADATA
8
LNAIN
9
LNASRC
6
XTAL1
14
AGND
5
XTAL2
26
27
DIO
28
SCLK
24
23
DGND
29
HV
IN
AV
DD
7
10
LNAOUT
11
MIXIN+
12
MIXIN-
13
MIXOUT
15
IFIN-
16
IFIN+
25
FDATA
19
DSF-
18
PDMAXF
17
PDMINF
20
DSF+
21
OPF+
22
DFF
DV
DD
CS
IF LIMITING
AMPS
ASK DATA FILTER
FSK DATA
FILTER
IMAGE
REJECTION
ASK
FSK
R
DF1
100k
Ω
R
DF2
100k
Ω
R
DF1
100k
Ω
R
DF2
100k
Ω
MAX1471
Functional Diagram
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