MAX1471 Datasheet, PDF (9/26 Pages) Maxim Integrated Products – 315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver

315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
Functional Diagram
LNAIN 8
LNASRC 9
AGND 14
XTAL1 6
XTAL2 5
CS 26
DIO 27
SCLK 28
DVDD ₂₄
DGND 23
LNAOUT
10
MIXIN+
11
MIXIN-
12
LNA
CRYSTAL
OSCILLATOR
DIVIDE
BY 32
PHASE
DETECTOR
SERIAL INTERFACE,
CONTROL REGISTERS,
AND POLLING TIMER
VCO
LOOP
FILTER
MIXOUT IFIN-
13 15
IMAGE
REJECTION
0°
Σ
90°
IFIN+
16
IF LIMITING
AMPS
ASK
RSSI
RDF1
100kΩ
RDF2
100kΩ
FSK
FSK
DEMODULATOR
ASK DATA FILTER
RDF1
100kΩ
4 DFA
3 OPA+
2 DSA+
31 PDMINA
HVIN 29
AVDD 7
3.0V
REG
3.0V
FSK DATA
FILTER
RDF2
100kΩ
32 PDMAXA
1 DSA-
30 ADATA
MAX1471
25
FDATA
19
18
DSF- PDMAXF
17
PDMINF
20 21 22
DSF+ OPF+ DFF
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