ADI AD5700ACPZ-RL7

The AD5700/AD5700-1 are single-chip solutions, designed and specified to operate as a HART FSK half-duplex modem, complying with the HART physical layer requirements. The AD5700/AD5700-1 integrate all of the necessary filtering, signal detection, modulating, demodulating and signal generation functions, thus requiring few external components. The 0.5% precision internal oscillator on the AD5700-1 greatly reduces the board space requirements, making it ideal for line-powered applications in both master and slave configurations. The maximum supply current consumption is 115 μA, making the AD5700/ AD5700-1 an optimal choice for low power loop-powered applications. Transmit waveforms are phase continuous 1200 Hz and 2200 Hz sinusoids. The AD5700/AD5700-1 contain accurate carrier detect circuitry and use a standard UART interface.

• HART-compliant fully integrated FSK modem
• 7200 Hz and 2200 Hz sinusoidal shift frequencies
• 115 μA maximum supply current in receive mode
• Suitable for intrinsically safe applications
• 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
• Precision internal oscillator (AD5700-1 only)
• Buffered HART output—extra drive capability
• 8 kV HBM ESD rating
• 1.71 V to 5.5 V power supply
• 1.71 V to 5.5 V interface
• -40°C to +125°C operation
• 4 mm × 4 mm LFCSP package
• HART physical layer compliant
• UART interface

• Field transmitters
• HART multiplexers
• PLC and DCS analog I/O modules
• HART network connectivity