MAX1472_10 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter

19-2872; Rev 3; 10/10
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300MHz-to-450MHz Low-Power,
Crystal-Based ASK Transmitter
General Description
The MAX1472 is a crystal-referenced phase-locked
loop (PLL) VHF/UHF transmitter designed to transmit
OOK/ASK data in the 300MHz to 450MHz frequency
range. The MAX1472 supports data rates up to
100kbps, and adjustable output power to more than
+10dBm into a 50Ω load. The crystal-based architec-
ture of the MAX1472 eliminates many of the common
problems with SAW transmitters by providing greater
modulation depth, faster frequency settling, higher
tolerance of the transmit frequency, and reduced
temperature dependence. Combined, these improve-
ments enable better overall receiver performance when
using a superheterodyne receiver such as the MAX1470
or MAX1473.
The MAX1472 is available in a 3mm x 3mm 8-pin
SOT23 package and is specified for the automotive
(-40°C to +125°C) temperature range. An evaluation kit
is available. Contact Maxim Integrated Products for
more information.
Applications
Remote Keyless Entry
RF Remote Controls
Tire Pressure Monitoring
Security Systems
Radio-Controlled Toys
Wireless Game Consoles
Wireless Computer Peripherals
Wireless Sensors
Features
o 2.1V to 3.6V Single-Supply Operation
o Low 5.3mA Operating Supply Current*
o Supports ASK with 90dB Modulation Depth
o Output Power Adjustable to More than +10dBm
o Uses Small Low-Cost Crystal
o Small 3mm  3mm 8-Pin SOT23 Package
o Fast-On Oscillator 220µs Startup Time
*At 50% duty cycle (315MHz, 2.7V supply, +10dBm output
power)
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
MAX1472AKA+T -40°C to +125°C 8 SOT23
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
TOP
MARK
AEKS
Typical Application Circuit
Pin Configuration
*
50Ω
ANTENNA
220pF 680pF
+
1 XTAL1
XTAL2 8
2 GND ^MAX1472 VDD 7
3.0V
3 PAGND
4 PAOUT
DATA 6
DATA INPUT
ENABLE 5
STANDBY OR
POWER-UP
*Optional power adjust resistor.
TOP VIEW
+
XTAL1 1
GND 2
PAGND 3
MAX1472
PAOUT 4
8 XTAL2
7 V_DD
6 DATA
5 ENABLE
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.