MAX1473_11 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic Range

19-2748; Rev 5; 1/11
EVAALVUAAILTAIOBNLEKIT
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.
Applications
Automotive Remote Keyless Entry Security Systems
Garage Door Openers
Home Automation
Remote Controls
Wireless Sensors
Local Telemetry
Systems
Features
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_LO/f_XTAL Ratio
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
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1473EUI+
-40°C to +85°C 28 TSSOP
MAX1473ETJ+
-40°C to +85°C 32 Thin QFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Functional Diagram and Typical Application Circuit appear
at end of data sheet.
Pin Configurations
TOP VIEW
+
XTAL1 1
AVDD 2
LNAIN 3
LNASRC 4
AGND 5
LNAOUT 6
MAX1473
AVDD 7
MIXIN1 8
MIXIN2 9
AGND 10
IRSEL 11
MIXOUT 12
DGND 13
DVDD 14
TSSOP
28 XTAL2
27 PWRDN
26 PDOUT
25 DATAOUT
24 V_DD5
23 DSP
22 DFFB
21 OPP
20 DSN
19 DFO
18 IFIN2
17 IFIN1
16 XTALSEL
15 AGCDIS
+
N.C. 1
AGND 2
LNAOUT 3
AVDD 4
MIXIN1 5
MIXIN2 6
AGND 7
IRSEL 8
MAX1473
24 DATAOUT
23 V_DD5
22 DSP
21 N.C.
20 DFFB
19 OPP
18 DSN
17 DFO
THIN QFN
________________________________________________________________ Maxim Integrated Products 1
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.