AD5700-1BCPZ-RL7

低功耗HART调制解调器 Low Power HART Modem

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**

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Field transmitters

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HART multiplexers

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PLC and DCS analog I/O modules

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HART network connectivity

### Features and Benefits

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HART-compliant fully integrated FSK modem

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1200 Hz and 2200 Hz sinusoidal shift frequencies

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115 µA maximum supply current in receive mode

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Suitable for intrinsically safe applications

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Integrated receive band-pass filter

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Minimal external components required

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Clocking optimized for various system configurations

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Ultralow power crystal oscillator 60 µA maximum

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External CMOS clock source

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Precision internal oscillator

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Buffered HART output—extra drive capability

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8 kV HBM ESD rating

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1.71 V to 5.5 V power supply

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1.71 V to 5.5 V interface

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−40°C to +125°C operation

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4 mm × 4 mm LFCSP package

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HART physical layer compliant

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UART interface