MAX1473ETJ+

Manufacturer Part NumberMAX1473ETJ+
DescriptionRF Receiver IC RCVR ASK 315MHZ/433MHZ
ManufacturerMaxim Integrated Products
MAX1473ETJ+ datasheet
 

Specifications of MAX1473ETJ+

Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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19-2748; Rev 5; 1/11
315MHz/433MHz ASK Superheterodyne
Receiver with Extended Dynamic Range
General Description
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
TOP VIEW
+
XTAL1
1
AVDD
2
LNAIN
3
LNASRC
4
AGND
5
MAX1473
LNAOUT
6
AVDD
7
MIXIN1
8
MIXIN2
9
AGND
10
IRSEL
11
MIXOUT
12
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
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
Efficient Power Cycling
o 250µs Startup Time
o Built-In 50dB RF Image Rejection
o Receive Sensitivity of -114dBm
PART
MAX1473EUI+
MAX1473ETJ+
Applications
+ Denotes a lead(Pb)-free/RoHS-compliant package.
Security Systems
* EP = Exposed pad.
Home Automation
Local Telemetry
Functional Diagram and Typical Application Circuit appear
Systems
at end of data sheet.
28
XTAL2
27
PWRDN
+
26
PDOUT
25
DATAOUT
N.C.
1
24
V
AGND
2
DD5
23
DSP
LNAOUT
3
22
DFFB
AVDD
4
21
OPP
MIXIN1
5
20
DSN
MIXIN2
6
19
DFO
AGND
7
18
IFIN2
IRSEL
8
17
IFIN1
16
XTALSEL
15
AGCDIS
Features
/f
Ratio
LO
XTAL
Ordering Information
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
28 TSSOP
-40°C to +85°C
32 Thin QFN-EP*
Pin Configurations
24
DATAOUT
23
V
DD5
22
DSP
21
N.C.
MAX1473
20
DFFB
19
OPP
18
DSN
17
DFO
THIN QFN
1

MAX1473ETJ+ Summary of contents

  • Page 1

    ... Low-Current Power-Down Mode for Efficient Power Cycling o 250µs Startup Time o Built-In 50dB RF Image Rejection o Receive Sensitivity of -114dBm PART MAX1473EUI+ MAX1473ETJ+ Applications + Denotes a lead(Pb)-free/RoHS-compliant package. Security Systems * EP = Exposed pad. Home Automation Local Telemetry Functional Diagram and Typical Application Circuit appear Systems at end of data sheet ...

  • 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 ...