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ATA5749 - Fractional-N PLL Transmitter

Description

The Atmel® ATA5749 is a fractional-N-PLL transmitter IC for 300MHz to 450MHz operation and is especially targeted for Tire Pressure Sensor Gauges, Remote Keyless Entry, and Passive Entry and other automotive applications.

Features

  • Fully Integrated Fractional-N PLL.
  • ASK and Closed Loop FSK Modulation.
  • Output Power Up to +12.5dBm from 300MHz to 450MHz.
  • Current Consumption is Scaled by Output Power Programming.
  • Fast Crystal Oscillator Start-up Time of Typically 200µs.
  • Low Current Consumption of Typically 7.3mA at 5.5dBm.
  • Only One 13.0000MHz Crystal for 314.1MHz to 329.5MHz and 424.5MHz to 439.9MHz Operation.
  • Single Ended RF Power Amplifier Output.

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Full PDF Text Transcription

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Features • Fully Integrated Fractional-N PLL • ASK and Closed Loop FSK Modulation • Output Power Up to +12.5dBm from 300MHz to 450MHz • Current Consumption is Scaled by Output Power Programming • Fast Crystal Oscillator Start-up Time of Typically 200µs • Low Current Consumption of Typically 7.3mA at 5.5dBm • Only One 13.0000MHz Crystal for 314.1MHz to 329.5MHz and 424.5MHz to 439.9MHz Operation • Single Ended RF Power Amplifier Output • Many Software Programmable Options Using SPI: – Output Power from –0.5dBm to +12.5dBm – RF Frequency from 300MHz to 450MHz with Different Crystals – FSK Deviation with 396Hz Resolution – CLK Output Frequency 3.25MHz or 1.
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