參數(shù)資料
型號(hào)： MAX7044AKA-T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 通信及網(wǎng)絡(luò)
英文描述： 300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO8
封裝： 3 X 3 MM, SOT-23, 8 PIN
文件頁數(shù)： 1/9頁
文件大小： 301K
代理商： MAX7044AKA-T
General Description
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 50
load while only drawing 7.7mA at 2.7V.
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.
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.
Applications
Remote Keyless Entry (RKE)
Tire-Pressure Monitoring (TPM)
Security Systems
Garage Door Openers
RF Remote Controls
Wireless Game Consoles
Wireless Computer Peripherals
Wireless Sensors
Typical Application Circuit
Features
+2.1V to +3.6V Single-Supply Operation
OOK/ASK Transmit Data Format
Up to 100kbps Data Rate
+13dBm Output Power into 50
Load
Low 7.7mA (typ) Operating Supply Current*
Uses Small, Low-Cost Crystal
Small 3mm x 3mm 8-Pin SOT23 Package
Fast-On Oscillator: 250μs Startup Time
* At 50% duty cycle (315MHz, 2.7V supply, +13dBm
output power)
M
300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
DATA
CLKOUT
PAOUT
1
2
8
7
XTAL2
V
DD
GND
PAGND
XTAL1
SOT23
TOP VIEW
3
4
6
5
MAX7044
Pin Configuration
Ordering Information
MAX7044
PAGND
1
XTAL1
ANTENNA
3.0V
3.0V
680pF
220pF
100nF
100nF
XTAL2
f
XTAL
8
2
GND
V
DD
7
3
DATA INPUT
CLOCK
OUTPUT
(f
CLKOUT
=
f
XTAL
/16)
DATA
6
4
PAOUT CLKOUT
5
19-3221; Rev 0; 1/04
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
TOP MARK
MAX7044AKA-T
-40°C to +125°C 8 SOT23-8
AEJW
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