Features and Benefits

  • Single-Chip, Half-Duplex Modem Overlays 1200bps FSK Digital Communication on Top of Installed 4mA–20mA Current Loop Infrastructure
  • Digital Signal Processing Provides Reliable Input Signal Detection in Noisy Conditions
  • Standard Component 3.6864MHz Crystal Reduces System Cost
  • Fully Tested and Verified as a HART-Registered Modem IC
  • Integrated Solution Requires Minimal Power and Space
    • 2.7V to 3.6V Operating Voltage
    • 285µA (max) Current Consumption
    • Space-Saving, 5mm x 5mm x 0.8mm, 20-Pin TQFN Package
    • Few External Components Required

Product Details

The DS8500 is a single-chip modem with Highway Addressable Remote Transducer (HART) capabilities. It has been fully tested and verified and has received a HART® Certificate of Registration. The device integrates the modulation and demodulation of the 1200Hz/2200Hz FSK signal, has very low power consumption, and needs only a few external components due to the integrated digital signal processing. The input signal is sampled by an analog-to-digital converter (ADC), followed by a digital filter/demodulator. This architecture ensures reliable signal detection in noisy environments. The output digital-to-analog converter (DAC) generates a sine wave and provides a clean signal with phase- continuous switching between 1200Hz and 2200Hz. Low power is achieved by disabling the receive circuits during transmit and vice versa. The DS8500 is ideal for low-power process control transmitters.


  • 4-20mA Loop-Powered Transmitters for Temperature, Pressure, Flow, and Level Measurement
  • HART Modem Interface Connectivity
  • HART Multiplexers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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Reference Designs (1)

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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.