Rainbow Electronics MAX1471 - Manual (Page 9)

MAX1471
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
_______________________________________________________________________________________ 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