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AD5700

Analog Devices
Part Number AD5700
Manufacturer Analog Devices
Description Low Power HART Modem
Published Mar 3, 2012
Detailed Description www.DataSheet.co.kr Data Sheet FEATURES HART-compliant fully integrated FSK modem 1200 Hz and 2200 Hz sinusoidal shift ...
Datasheet PDF File AD5700 PDF File

AD5700
AD5700

Overview
www.
DataSheet.
co.
kr Data Sheet FEATURES 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 Precision internal oscillator (AD5700-1 only) Buffered HART output—extra drive capability 8 kV HBM ESD rating 2 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 Low Power HART Modem AD5700/AD5700-1 GENERAL DESCRIPTION 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.
Table 1.
Related Products Part No.
AD5755-1 Description Quad-channel, 16-bit, serial input, 4 mA to 20 mA and voltage output DAC, dynamic power control, HART connectivity 16-bit, serial input, loop powered, 4 mA to 20 mA DAC Single-channel, 12-bit/16-bit, serial input, 4 mA to 20 mA current source DACs Single-channel, 12-bit/16-bit, serial input, current source and voltage output DACs VCC APPLICATIONS Field transm...


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