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MAX1473_12

更新时间： 2024-10-03 11:18:35
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美信 - MAXIM /
页数 文件大小 规格书
16页 212K
描述
315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic Range

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19-2748; Rev 6; 1/12  
315MHz/433MHz ASK Superheterodyne  
Receiver with Extended Dynamic Range  
MAX1473  
General Description  
Features  
o Optimized for 315MHz or 433MHz ISM Band  
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.  
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 /f  
Ratio  
LO XTAL  
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  
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.  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
28 TSSOP  
MAX1473EUI+  
MAX1473ETJ+  
32 Thin QFN-EP*  
Applications  
Automotive Remote Keyless Entry Security Systems  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
Garage Door Openers  
Remote Controls  
Home Automation  
Functional Diagram and Typical Application Circuit appear  
at end of data sheet.  
Local Telemetry  
Systems  
Wireless Sensors  
Pin Configurations  
TOP VIEW  
+
XTAL1  
AVDD  
1
2
3
4
5
6
7
8
9
28 XTAL2  
27 PWRDN  
26 PDOUT  
25 DATAOUT  
+
LNAIN  
LNASRC  
AGND  
N.C.  
AGND  
1
2
3
4
5
6
7
8
24 DATAOUT  
23  
24  
V
DD5  
V
DD5  
MAX1473  
LNAOUT  
AVDD  
23 DSP  
LNAOUT  
AVDD  
22 DSP  
21 N.C.  
20 DFFB  
19 OPP  
18 DSN  
17 DFO  
22 DFFB  
21 OPP  
MAX1473  
MIXIN1  
MIXIN2  
MIXIN1  
MIXIN2  
AGND  
20 DSN  
AGND 10  
IRSEL 11  
19 DFO  
18 IFIN2  
17 IFIN1  
16 XTALSEL  
15 AGCDIS  
IRSEL  
MIXOUT 12  
DGND 13  
DVDD 14  
TSSOP  
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.  
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