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1-chip Low Power HART Modem

Model: AD5700

  • HART-compliant fully integrated FSK modem
  • 1200 Hz and 2200 Hz sinusoidal shift frequencies
  • 115 µA maximum supply current in receive mode
  • Integrated receive band-pass filter
  • Minimal external components required
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The AD5700 is a single-chip solution, designed and specified to operate as a HART® FSK half-duplex modem, comply¬ing with the HART physical layer requirements. The AD5700 integrates all of the necessary filtering, signal detection, modulating, demodulating and signal generation functions, thus requiring few external components. The maxi¬mum supply current consumption of 115 µA and the small 4mm x 4mm housing, makes the AD5700 an optimal choice for low power loop-powered applica-tions. Transmit waveforms are phase continuous 1200 Hz and 2200 Hz sinusoids. The AD5700 contains accurate carrier detect circuitry and uses a standard UART interface.
  • HART-compliant fully integrated FSK modem
  • 1200 Hz and 2200 Hz sinusoidal shift frequencies
  • 115 µA maximum supply current in receive mode
  • Integrated receive band-pass filter
  • Minimal external components required
  • Clocking optimized for various system configurations
  • Ultralow power crystal oscillator (60 µA maximum)
  • External CMOS clock source
  • Intrinsically safe solution
  • Buffered HART output-extra drive capability
  • 1.71 V to 5.5 V power supply
  • Applications
    • Field transmitters
    • HART multiplexers
    • PLC and DCS analog I/O modules
    • HART network connectivity
 
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