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ATA5749 Datasheet Fractional-n Pll Transmitter

Manufacturer: Atmel (now Microchip Technology)

General 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.

It operates at data rates up to 40kbit/s Manchester for ASK and FSK with a typical 5.5dBm output power at 7.3mA.

Transmitter parameters such as output power, output frequency, FSK deviation, and current consumption can be programmed using the SPI interface.

Key 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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ATA5749 Distributor