AD5700-1ACPZ-RL7

The AD5700/AD5700-1 are single-chip solutions designed as HART FSK half-duplex modems, compliant with the HART physical layer requirements. These devices integrate all necessary filtering, signal detection, modulation, demodulation, and signal generation functions, minimizing the required external components. The AD5700-1 integrates a 0.5% precision oscillator, significantly saving board space, making it ideal for loop-powered applications in both master and slave configurations. With a maximum supply current of 115 μA, the AD5700/AD5700-1 are an excellent choice for low-power loop-powered applications. The transmitted waveform consists of phase-continuous 1200 Hz and 2200 Hz sine waves. The AD5700/AD5700-1 feature a built-in precision carrier detect circuit and use a standard UART interface.

Applications

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

Key features

• HART-compatible fully integrated FSK modem
• 1200 Hz and 2200 Hz sinusoidal shift frequencies
• Maximum supply current 715 μA in receive mode
• Suitable for intrinsically safe applications
• Integrated receive bandpass filter with minimal external components
• Clock-optimized for various system configurations
• Ultra-low power crystal oscillator (60 μA maximum)
• External CMOS clock source
• Integrated precision oscillator (AD5700-1 only)
• Buffered HART output — additional drive capability
• 8 kV HBM ESD rating
• 2 V to 5.5 V supply voltage
• 1.71 V to 5.5 V interface
• Operating temperature range: -40°C to +125°C
• Package: 4 mm × 4 mm LFCSP
• HART physical layer compatible
• UART interface