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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 50? 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 improvements 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.

Features

? 2.1V to 3.6V Single-Supply Operation

? Low 5.3mA Operating Supply Current*

? Supports ASK with 90dB Modulation Depth

? Output Power Adjustable to More than +10dBm

? Uses Small Low-Cost Crystal

? Small 3mm ? 3mm 8-Pin SOT23 Package

? Fast-On Oscillator 220μs Startup Time

Applications

Remote Keyless Entry

RF Remote Controls

Tire Pressure Monitoring

Security Systems

Radio-Controlled Toys

Wireless Game Consoles

Wireless Computer Peripherals

Wireless Sensors