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MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter

Industry's Smallest 300MHz to 450MHz Transmitter in SOT23 Package Consumes Only 5.5mA at +10dBm Output


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Description
FULL DATA SHEET (PDF, 244kB)
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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 architecture 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.

Key Features   Applications/Uses
  • 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 x 3mm 8-Pin SOT23 Package
  • Fast-On Oscillator 220µs Startup Time
*At 50% duty cycle (315MHz, 2.7V supply, +10dBm output power)

 
  • Radio-Controlled Toys
  • Remote Keyless Entry (RKE)
  • RF Remote Controls
  • Security Systems
  • Tire-Pressure Monitoring (TPM)
  • Wireless Computer Peripherals
  • Wireless Game Consoles
  • Wireless Sensors

    Key Specifications:   Transmit System ICs
    Part Number Min. Frequency (MHz) Max. Frequency (MHz) Features Industry Qualified Footprint (mm x mm) Package Price**
    MAX1472  300 450
    2.1V to 3.6V Single-Supply Operation
    Output Power Adjustable to >+10dBm
    Supports ASK with 90dBm Modulation Depth
    Uses Small Low-Cost XTAL
    Automotive - General 3.0 x 3.0 SOT-23/8 $1.15 @ 1k
    See All Transmit System ICs (19)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX1472: Typical Application Circuit
    Typical Application Circuit

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    Document Ref.: 19-2872; Rev 1; 2005-06-14
    This page last modified: 2008-08-29



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