MAX1479

PRODUCTION

300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter

300MHz to 450MHz Low-Power, Crystal-Based ASK/FSK Transmitter has More than +10dBm Output

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • ETSI-Compliant EN300 220
  • +2.1V to +3.6V Single-Supply Operation
  • Supports ASK, OOK, and FSK Modulations
  • Adjustable FSK Shift
  • +10dBm Output Power into 50Ω Load
  • Low Supply Current (6.7mA in ASK Mode, and 10.5mA in FSK Mode)
  • Uses Small Low-Cost Crystal
  • Small 16-Pin TQFN Package
  • Fast-On Oscillator—200µs Startup Time
  • Programmable Clock Output

The MAX1479 crystal-referenced phase-locked-loop (PLL) VHF/UHF transmitter is designed to transmit ASK, OOK, and FSK data in the 300MHz to 450MHz frequency range. The MAX1479 supports data rates up to 100kbps in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence. These improvements enable better overall receiver performance when using the MAX1479 together with a superheterodyne receiver such as the MAX1470, MAX1471, MAX1473, or MAX7033.

The MAX1479 is available in a 16-pin TQFN package (3mm x 3mm) and is specified for the automotive temperature range from -40°C to +125°C.

Applications

  • Garage Door Openers
  • Radio-Controlled Toys
  • Remote Keyless Entry (RKE)
  • RF Remote Controls
  • Security Systems
  • Tire-Pressure Monitoring (TPM)
  • Wireless Computer Peripherals
  • Wireless Game Consoles
  • Wireless Sensors
MAX1479
300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter
MAX1479: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 18

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Evaluation Kits

MAX1479EVKIT

Evaluation Kit for the MAX1479

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Features and Benefits

  • Proven PC Board Layout
  • Proven Components Parts List
  • Multiple Test Points Provided on Board
  • Available in 315MHz or 433.92MHz Optimized Versions
  • Adjustable Frequency Range from 300MHz to 450MHz*
  • Fully Assembled and Tested
  • Can Operate as a Stand-Alone Transmitter with Included Battery

    *Requires component changes.

    • Product Details

    The MAX1479 evaluation kit (EV kit) allows for a detailed evaluation of the MAX1479 ASK/FSK transmitter. It enables testing of the device's RF performance and requires no additional support circuitry. The RF output uses a 50Ω matching network and an SMA connector for convenient connection to test equipment. A reverse polarity SMA is also included to connect to a 1/4 wave whip antenna. The EV kit can also directly interface to the user's embedded design for easy data encoding.

    The MAX1479EV kit comes in two versions: a 315MHz version and a 433.92MHz version. The passive components are optimized for these frequencies. These components can easily be changed to work at RF frequencies from 300MHz to 450MHz.

    For easy implementation into the customer's design, the MAX1479EV kit also features a proven PC board layout, which can be easily duplicated for quicker time-to-market. The EV kit Gerber files are available for download at www.maximintegrated.com.

    Applications

    • Garage Door Openers
    • Radio-Controlled Toys
    • Remote Keyless Entry (RKE)
    • RF Remote Controls
    • Security Systems
    • Tire-Pressure Monitoring (TPM)
    • Wireless Computer Peripherals
    • Wireless Game Consoles
    • Wireless Sensors
    MAX1479EVKIT
    Evaluation Kit for the MAX1479

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