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[FAQ] Which TI devices support the HART protocol?

Joseph Wu
Guru* 96225 points
Part Number: AFE881H1
Other Parts Discussed in Thread: DAC161S997, DAC161P997, DAC8750, DAC7750, DAC8760, DAC7760, DAC8771, DAC8775, DAC8740H, DAC8741H, DAC8742H, , AFE781H1, AFE882H1, AFE782H1

Tool/software:

Which TI devices support the HART protocol, either as a HART modem, or analog output that can output a HART frequency-shift-keyed (FSK) signal?

  • +1
    TI__Guru* 96225 points

    TI has many DAC devices that are compatible with the HART Protocol. Some devices provide a range of analog outputs. These devices can output a voltage or current with the HART frequency-shift-keyed (FSK) signal superimposed on the output. Other devices are HART modems with a variety of features integrated into the device.

    Here is a table of HART compatible devices:

    Device Type TI Device DAC Resolution Features HART Connectivity
    DAC for field transmitter device DAC161S997 16-bit Field transmitter device with precision DAC with internal reference, integrated op-amp, SPI, and matched resistors for setting current loop drive HART signal capacitively coupled out to DAC from C2 pin
    DAC161P997 16-bit Field transmitter device with precision DAC with internal reference, integrated op-amp, single-wire interface, and matched resistors for setting current loop drive
    Current output DAC DAC8750 16-bit Single-channel programmable current output DAC with internal reference for 4-20mA current loop applications HART signal capacitively coupled out to DAC through HART-IN pin
    DAC7750 12-bit
    Current and voltage output DAC DAC8760 16-bit Single-channel programmable current and voltage output DAC with internal reference for 4-20mA analog output applications HART signal capacitively coupled out to DAC through DAC7760 HART-IN pin
    DAC7760 12-bit
    DAC8771 16-bit Single-channel programmable current and voltage output DAC, with internal reference and buck-boost converter for analog output applications HART signal capacitively coupled into DAC through HART-IN_x pin

    DAC8775

    		 16-bit Four-channel programmable current and voltage output DAC, with internal reference and buck-boost converter for analog output applications
    HART modem device DAC8740H – HART modem with UART interface HART signal capacitively coupled into modem on MOD_IN or MOD_INF depending on input filtering, HART sinusoid out on MOD_OUT

    DAC8741H

    		 HART modem with SPI interface
    DAC8742H HART modem with SPI and UART interface
    HART modem device with DAC AFE881H1 16-bit Field transmitter device with precision DAC with 0.15-V to 1.25-V output range, internal reference, and ADC HART signal capacitively coupled into modem on MOD_IN or MOD_INF depending on input filtering, HART sinusoid out on MOD_OUT
    AFE781H1 14-bit
    AFE882H1 16-bit Field transmitter device with precision DAC with 0-V to 2.5-V output range, internal reference, and ADC
    AFE782H1 14-bit

    In addition to these devices, there are application notes and design guides that show how HART is integrated with these devices: