Datasheet

315MHz/433MHz ASK Superheterodyne
Receiver with Extended Dynamic Range
PACKAGE TYPE PACKAGE CODE OUTLINE NO.
LAND
PATTERN NO.
28 TSSOP U28+1
21-0066
90-0171
32 Thin QFN-EP T3255+3
21-0140
90-0001
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
Functional Diagram
LNAOUT MIXIN1 MIXIN2
0˚
90˚
IFIN1MIXOUT IFIN2
RSSI
R
DF2
100kΩ
R
DF1
100kΩ
DIVIDE
BY 64
VCO
LOOP
FILTER
PHASE
DETECTOR
CRYSTAL
DRIVER
POWER
DOWN
IF LIMITING
AMPS
14
LNASRC
DATA
SLICER
DATA
FILTER
Q
∑
I
AUTOMATIC
GAIN
CONTROL
IMAGE
REJECTION
3.2V REG
24
2
IRSEL
13
5,10
AVDD
V
DD5
DVDD
DGND
AGND
LNAIN
3
XTALSEL
16
XTAL1
1
XTAL2
28
PWRDN
27
DATAOUT
25
DSN
20
DSP
23
DFO
19
PDOUT
26
OPP
21
DFFB
22
4 15 6 8 9 11 12 17 18
AGCDIS
÷2
÷1
MAX1473
LNA
7
AVDD
MAX1473
Maxim Integrated
15