Product Details
●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 115µA, making theAD5700/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.
●Applications
● Field transmitters
● HART multiplexers
● PLC and DCS analog I/O modules
● HART network connectivity
●### Features and Benefits
● HART-compliant fully integrated FSK modem
● 1200 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
● 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
