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AD5700-1:  Low Power HART Modem with Precision Internal Oscillator

Product Details

Product Status:Recommended for New Designs

The AD5700-1 is a single-chip solution, designed and specified to operate as a HART® FSK half-duplex modem, comply­ing with the HART physical layer requirements. The AD5700-1 integrates 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 required, making it ideal for line-powered applications in both master and slave configurations. The maxi­mum supply current consumption of the oscillator is 285µA, making the AD5700-1 a low power complete solution ideal for per channel HART I/O implementations. Transmit waveforms are phase continuous 1200 Hz and 2200 Hz sinusoids. The AD5700-1 contains accurate carrier detect circuitry and uses a standard UART interface.


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


  • HART-compliant fully integrated FSK modem
  • 1200 Hz and 2200 Hz sinusoidal shift frequencies
  • 115 µA maximum supply current in receive mode
  • Integrated receive band-pass filter
    - Minimal external components required
  • Clocking optimized for various system configurations
    - 0.5% Precision internal oscillator
    - Ultralow power crystal oscillator (60 µA maximum)
    - External CMOS clock source
  • Intrinsically safe solution
  • Buffered HART output—extra drive capability
  • See data sheet for additional features

Functional Block Diagram for AD5700-1

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Title Content Type File Type
AD5700/AD5700-1: Low Power HART Modem Data Sheet (Rev F, 01/2014) (pdf, 490 kB) Data Sheets PDF
CN0364: PLC/DCS Quad Channel Voltage and Current Input with HART Compatibility  (pdf, 266 kB) Circuit Note PDF
CN0328: Completely Isolated 4-Channel Multiplexed HART Analog Output Circuit  (pdf, 828 kB) Circuit Note PDF
CN0278: Complete 4 mA to 20 mA HART Solution with Additional Voltage Output Capability  (pdf, 442 kB) Circuit Note PDF
CN-0321: Fully Isolated, Single Channel Voltage and 4 mA to 20 mA Output with HART Connectivity  (pdf, 282 kB) Circuit Note PDF
Complete 4 mA to 20 mA Loop Powered Field Instrument with HART Interface  (pdf, 259 kB) Circuit Note PDF
CN-0270: Complete 4 mA to 20 mA HART Solution  (pdf, 274 kB) Circuit Note PDF
Demo circuit for 4- 20-mA HART Enabled Field Instruments
Field instrument demonstration circuit for a loop powered HART® enabled smart transmitter. A complete low power, high precision signal chain solution with minimum area overhead, tested and verified as part of ADI’s Circuits from the Lab™ initiative.
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Loop-Powered Field Instrument Circuit with HART Interface
Save time in designing loop powered field instruments with Analog Devices’ demo circuit. It features low power, high performance components – ADuCM360 precision analog microcontroller, AD5421 16-bit 4-20mA loop-powered DAC and AD5700 FSK HART modem.
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UG-382: Evaluation Board for FSK AD5700/AD5700-1 HART Modem  (pdf, 272 kB) User Guides PDF
Quad 16-Bit Voltage-/Current-Output DACs Save Space, Cost, and Power in Multichannel PLCs
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Design Tools,Models,Drivers & Software

Title Content Type File Type
AD5700/AD5700-1 IBIS Model  (ibs) IBIS Models IBS

Evaluation Kits & Symbols & Footprints

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Companion Products

Suggested Companion Products

Recommended Output DAC's for the AD5700-1

  • For 16-bit, loop powered, 4 mA to 20 mA DAC, we recommend the AD5421.
  • For 12-bit /16-bit, line powered, 4 mA to 20 mA current source DAC's, we recommend the AD5410 and the AD5420.
  • For 12-bit /16-bit, current source and voltage output DAC's, we recommend the AD5412 and the AD5422.
  • For 16-bit, quad-channel, 4 mA to 20 mA and voltage output DAC, we recommend the AD5755-1.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD5700-1 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD5700-1ACPZ-RL7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $4.25 Y  Material Info PCN Purchase
AD5700-1BCPZ-R5 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 500 - $4.95 Y  Material Info PCN Purchase Sample
AD5700-1BCPZ-RL7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $4.95 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD5700/AD5700-1 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD5700-1EBZ Status: Production Evaluation Board $59.99 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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