MAX1473ETJ+T Maxim Integrated Products, MAX1473ETJ+T Datasheet

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MAX1473ETJ+T

Manufacturer Part Number
MAX1473ETJ+T
Description
RF Receiver IC RCVR ASK 315MHZ/433MHZ
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1473ETJ+T

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1473 fully integrated low-power CMOS super-
heterodyne receiver is ideal for receiving amplitude-
shift-keyed (ASK) data in the 300MHz to 450MHz
frequency range. Its signal range is from -114dBm to
0dBm. With few external components and a low-current
power-down mode, it is ideal for cost- and power-sensi-
tive applications typical in the automotive and consumer
markets. The chip consists of a low-noise amplifier
(LNA), a fully differential image-rejection mixer, an on-
chip phase-locked-loop (PLL) with integrated voltage-
controlled oscillator (VCO), a 10.7MHz IF limiting
amplifier stage with received-signal-strength indicator
(RSSI), and analog baseband data-recovery circuitry.
The MAX1473 also has a discrete one-step automatic
gain control (AGC) that drops the LNA gain by 35dB
when the RF input signal is greater than -57dBm.
The MAX1473 is available in 28-pin TSSOP and 32-pin
thin QFN packages. Both versions are specified for the
extended (-40°C to +85°C) temperature range.
Automotive Remote Keyless Entry
Garage Door Openers
Remote Controls
Wireless Sensors
19-2748; Rev 5; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
LNASRC
LNAOUT
MIXOUT
MIXIN1
MIXIN2
XTAL1
LNAIN
AGND
AGND
DGND
DVDD
AVDD
AVDD
IRSEL
________________________________________________________________ Maxim Integrated Products
Receiver with Extended Dynamic Range
10
11
12
13
14
1
2
3
4
5
6
7
8
9
315MHz/433MHz ASK Superheterodyne
+
General Description
MAX1473
TSSOP
Applications
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Security Systems
Home Automation
Local Telemetry
Systems
XTAL2
PWRDN
PDOUT
DATAOUT
V
DSP
DFFB
OPP
DSN
DFO
IFIN2
IFIN1
XTALSEL
AGCDIS
DD5
LNAOUT
MIXIN1
MIXIN2
AGND
AGND
AVDD
IRSEL
N.C.
o Optimized for 315MHz or 433MHz ISM Band
o Operates from Single 3.3V or 5.0V Supplies
o High Dynamic Range with On-Chip AGC
o Selectable Image-Rejection Center Frequency
o Selectable x64 or x32 f
o Low 5.2mA Operating Supply Current
o < 2.5µA Low-Current Power-Down Mode for
o 250µs Startup Time
o Built-In 50dB RF Image Rejection
o Receive Sensitivity of -114dBm
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
MAX1473EUI+
MAX1473ETJ+
Efficient Power Cycling
1
2
3
4
5
6
7
8
+
PART
THIN QFN
MAX1473
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Pin Configurations
LO
/f
XTAL
Ratio
24
23
22
21
20
19
18
17
DATAOUT
V
DSP
N.C.
DFFB
OPP
DSN
DFO
PIN-PACKAGE
28 TSSOP
32 Thin QFN-EP*
DD5
Features
1

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MAX1473ETJ+T Summary of contents

Page 1

... DGND 13 DVDD 14 TSSOP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Optimized for 315MHz or 433MHz ISM Band o Operates from Single 3.3V or 5.0V Supplies o High Dynamic Range with On-Chip AGC ...

Page 2

ASK Superheterodyne Receiver with Extended Dynamic Range ABSOLUTE MAXIMUM RATINGS V to AGND.......................................................-0.3V to +6.0V DD5 AVDD to AGND .....................................................-0.3V to +4.0V DVDD to DGND .....................................................-0.3V to +4.0V AGND to DGND.....................................................-0.1V to +0.1V IRSEL, DATAOUT, XTALSEL, AGCDIS, PWRDN to ...

Page 3

ASK Superheterodyne Receiver with Extended Dynamic Range DC ELECTRICAL CHARACTERISTICS (5.0V OPERATION) ( Typical Application Circuit , V = 4.5V to 5.5V signal applied are 5.0V and T = +25°C.) (Note 1) ...

Page 4

ASK Superheterodyne Receiver with Extended Dynamic Range AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , V = 3.0V to 3.6V, all RF inputs are referenced to 50Ω otherwise noted. Typical values are at V PARAMETER SYMBOL ...

Page 5

ASK Superheterodyne Receiver with Extended Dynamic Range AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , V = 3.0V to 3.6V, all RF inputs are referenced to 50Ω otherwise noted. Typical values are at V PARAMETER SYMBOL ...

Page 6

ASK Superheterodyne Receiver with Extended Dynamic Range ( Typical Application Circuit , V = 3.3V SUPPLY CURRENT vs. SUPPLY VOLTAGE 5.6 +105°C 5.5 5.4 +85°C 5.3 +25°C 5.2 5.1 5.0 -40°C 4.9 3.0 3.1 3.2 3.3 3.4 ...

Page 7

ASK Superheterodyne Receiver with Extended Dynamic Range ( Typical Application Circuit , V = 3.3V NORMALIZED IF GAIN vs. IF FREQUENCY -10 -15 - FREQUENCY (MHz) REGULATOR VOLTAGE vs. REGULATOR CURRENT ...

Page 8

ASK Superheterodyne Receiver with Extended Dynamic Range PIN NAME TSSOP TQFN 1 29 XTAL1 1st Crystal Input. (See the Phase-Locked Loop section.) Positive Analog Supply Voltage. For +5V operation, pin 2 is the output of an on-chip +3.2V low-dropout ...

Page 9

ASK Superheterodyne Receiver with Extended Dynamic Range Detailed Description The MAX1473 CMOS superheterodyne receiver and a few external components provide the complete receive chain from the antenna to the digital output data. Depending on signal power and component selection, ...

Page 10

ASK Superheterodyne Receiver with Extended Dynamic Range Phase-Locked Loop The PLL block contains a phase detector, charge pump/integrated loop filter, VCO, asynchronous 64x clock divider, and crystal oscillator driver. Besides the crystal, this PLL does not require any external ...

Page 11

ASK Superheterodyne Receiver with Extended Dynamic Range In actuality, the oscillator pulls every crystal. The crys- tal’s natural frequency is really below its specified fre- quency, but when loaded with the specified load capacitance, the crystal is pulled and ...

Page 12

ASK Superheterodyne Receiver with Extended Dynamic Range MAX1473 DATA SLICER DSN DATAOUT DSP R1 C4 Figure 2. Generating Data Slicer Threshold Note that a long string of zeros or 1’s can cause the threshold to drift. ...

Page 13

ASK Superheterodyne Receiver with Extended Dynamic Range V DD3 THEN DD3 3.0V TO 3.6V CONNECTED 4.5V TO 5.5V CREATED BY LDO, AVAILABLE AT AVDD (PIN 2) C11 RF INPUT C1 ...

Page 14

ASK Superheterodyne Receiver with Extended Dynamic Range LNASRC AGCDIS LNAOUT AUTOMATIC 3 LNA LNAIN GAIN CONTROL 2 AVDD 3.2V REG 24 V DD5 7 AVDD DIVIDE 14 VCO DVDD BY 64 PHASE LOOP 13 DGND DETECTOR ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2011 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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