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MAX7044_11

更新时间： 2024-11-09 11:14:59
品牌 Logo 应用领域
美信 - MAXIM 晶体
页数 文件大小 规格书
10页 148K
描述
300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter

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MAX7044_11 数据手册

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19-3221; Rev 4; 2/11  
300MHz to 450MHz High-Efficiency,  
Crystal-Based +13dBm ASK Transmitter  
MAX704  
General Description  
Features  
The MAX7044 crystal-referenced phase-locked-loop  
(PLL) VHF/UHF transmitter is designed to transmit  
OOK/ASK data in the 300MHz to 450MHz frequency  
range. The MAX7044 supports data rates up to 100kbps,  
and provides output power up to +13dBm into a 50Ω  
load while only drawing 7.7mA at 2.7V.  
o +2.1V to +3.6V Single-Supply Operation  
o OOK/ASK Transmit Data Format  
o Up to 100kbps Data Rate  
o +13dBm Output Power into 50Ω Load  
o Low 7.7mA (typ) Operating Supply Current*  
o Uses Small, Low-Cost Crystal  
o Small 3mm x 3mm 8-Pin SOT23 Package  
o Fast-On Oscillator: 250μs Startup Time  
The crystal-based architecture of the MAX7044 elimi-  
nates many of the common problems with SAW-based  
transmitters by providing greater modulation depth,  
faster frequency settling, higher tolerance of the trans-  
mit frequency, and reduced temperature dependence.  
The MAX7044 also features a low supply voltage of  
+2.1V to +3.6V. These improvements enable better  
overall receiver performance when using the MAX7044  
together with a superheterodyne receiver such as the  
MAX1470 or MAX1473.  
* At 50% duty cycle (315MHz, 2.7V supply, +13dBm output  
power)  
A simple, single-input data interface and a buffered  
clock-out signal at 1/16th the crystal frequency make  
the MAX7044 compatible with almost any microcon-  
troller or code-hopping generator.  
The MAX7044 is available in an 8-pin SOT23 package  
and is specified over the -40°C to +125°C automotive  
temperature range.  
Ordering Information  
PIN-  
PART  
TEMP RANGE  
TOP MARK  
PACKAGE  
MAX7044AKA+T -40°C to +125°C 8 SOT23  
Applications  
Remote Keyless Entry (RKE)  
Tire-Pressure Monitoring (TPM)  
Security Systems  
AEJW  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
T = Tape and reel.  
Garage Door Openers  
RF Remote Controls  
Wireless Game Consoles  
Wireless Computer Peripherals  
Wireless Sensors  
Typical Application Circuit  
Pin Configuration  
TOP VIEW  
f
XTAL  
3.0V  
3.0V  
1
2
8
7
XTAL2  
XTAL1  
GND  
+
XTAL1  
GND  
1
2
3
4
8
7
6
5
XTAL2  
220pF  
100nF  
680pF  
100nF  
V
DD  
V
DD  
MAX7044  
MAX7044  
3
4
6
5
DATA INPUT  
PAGND  
PAOUT  
DATA  
ANTENNA  
DATA  
PAGND  
CLOCK  
CLKOUT  
OUTPUT  
CLKOUT  
PAOUT  
(f  
=
CLKOUT  
f
/16)  
XTAL  
SOT23  
________________________________________________________________ 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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