Details, datasheet, quote on part number: MAX1472
PartMAX1472
Category
Title300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter
DescriptionThe 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 (-40C to +125C) temperature range. An evaluation kit is available. Contact Maxim Integrated Products for more information.
CompanyMaxim Integrated Products
DatasheetDownload MAX1472 datasheet
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PackagesMAX1472AKA+
MAX1472AKA-TG05
MAX1472AKA+T
MAX1472AKA-T
  
MAX1472 photo

 

Features, Applications

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 8-Pin SOT23 Package o Fast-On Oscillator 220s Startup Time

The is a crystal-referenced phase-locked loop (PLL) VHF/UHF transmitter designed to transmit OOK/ASK data in the to 450MHz frequency range. The MAX1472 supports data rates to 100kbps, and adjustable output power to more than +10dBm into a 50 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 or MAX1473. The MAX1472 is available 8-pin SOT23 package and is specified for the automotive to +125C) 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

SOT23 *Optional power adjust resistor. Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

VDD to +4.0V All Other Pins GND................................-0.3V to (VDD + 0.3V) Continuous Power Dissipation (TA 8-Pin SOT23 (derate 8.9mW/C above +70C)............714mW Operating Temperature to +125C Storage Temperature to +150C Lead Temperature (soldering, 10s).................................+300C Soldering Temperature (reflow).......................................+260C

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

(Typical Application Circuit, output power is referenced to 50, VDD to 3.6V, VENABLE = VDD, to +125C, unless otherwise noted. Typical values are at VDD = +25C, unless otherwise noted.) (Note 1)

PARAMETER SYSTEM PERFORMANCE Supply Voltage VDD VENABLE = VDD (Note 2) fRF = 315MHz VENABLE = VDD, VDATA = VDD VENABLE = VDD, VDATA = 0V VENABLE = VDD (Note 2) fRF = 433MHz VENABLE = VDD, VDATA = VDD VENABLE = VDD, VDATA = 0V Standby Current Frequency Range Data Rate Modulation Depth Output Power POUT ISTDBY fRF VENABLE < VIL, < +85C (Note 3) VENABLE < VIL < +125C (Note 3) (Note 1) (Note ON to OFF POUT ratio (Note = +25C, VDD = 2.7V (Notes = +125C, VDD = 2.1V (Notes = -40C, VDD = 3.6V (Notes 5, 6) Turn-On Time Transmit Efficiency with CW Transmit Efficiency at 50% Duty Cycle tON To fOFFSET < 50kHz (Note 7) To fOFFSET < 5kHz (Note 7) fRF = 315MHz (Note 8) fRF = 433MHz (Note 8) fRF = 315MHz (Note 9) fRF = 433MHz (Note % 12.8 dBm nA A MHz kbps mA V SYMBOL CONDITIONS MIN TYP MAX UNITS

(Typical Application Circuit, output power is referenced to 50, VDD to 3.6V, VENABLE = VDD, to +125C, unless otherwise noted. Typical values are at VDD = +25C, unless otherwise noted.) (Note 1)

PARAMETER VCO Gain fRF = 315MHz Phase Noise fRF = 433MHz Maximum Carrier Harmonics Reference Spur Loop Bandwidth Crystal Frequency Oscillator Input Impedance Frequency Pushing by VDD DIGITAL INPUTS Data Input High Data Input Low Maximum Input Current Pulldown Current VIH VIL 2 25 VDD nA A fXTAL From each XTAL pin to GND fRF = 315MHz fRF = 433MHz fRF = 315MHz fRF = 433MHz fOFFSET =100kHz fOFFSET = 1MHz fOFFSET =100kHz fOFFSET = 1MHz SYMBOL CONDITIONS MIN TYP fRF dBc MHz pF ppm/V dBc/Hz MAX UNITS MHz/V PHASE-LOCKED LOOP PERFORMANCE

Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: Note 9:

100% tested = +25C. Guaranteed by design and characterization over temperature. 50% duty cycle at 10kHz data. Guaranteed by design and characterization, not production tested. Generally limited by PC board layout. Output power can be adjusted with external resistor. Guaranteed by design and characterization at fRF = 315MHz. VENABLE < VIL to VENABLE > VIH. fOFFSET is defined as the frequency deviation from the desired carrier frequency. VENABLE > VIH, VDATA > VIH, Efficiency = POUT/(VDD x IDD). VENABLE > VIH, DATA toggled from VIL to VIH, 10kHz, 50% duty cycle, Efficiency = POUT/(VDD x IDD).


 

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