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MAX7044：300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter

Low-Power, 300MHz to 450MHz, Crystal-Based ASK Transmitter has +13dBm Output Power

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 50Ω load while only drawing 7.7mA at 2.7V. The crystal-based architecture of the MAX7044 eliminates many of the common problems with SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit 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 microcontroller 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.

Key Features +2.1V to +3.6V Single-Supply Operation OOK/ASK Transmit Data Format Up to 100kbps Data Rate +13dBm Output Power into 50Ω 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

MAX7044: Functional Diagram Applications/Uses Garage Door Openers Remote Keyless Entry (RKE) RF Remote Controls Security Systems Tire-Pressure Monitoring (TPM) Wireless Computer Peripherals Wireless Game Consoles Wireless Sensors

DataSheet

Parametrics

Design kits & evaluation modules

• MAX7044EVKIT

Quality and Environmental Data

• MAX7044.pdf

Related Products

• MAX1473：315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic Range

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