Other Parts Discussed in Thread: DAC161S997 , DAC161P997 , DAC8750 , DAC7750 , DAC8760 , DAC7760 , DAC8771 , DAC8775 , DAC8740H , DAC8741H , DAC8742H , AFE881H1 , AFE781H1 , AFE882H1 , AFE782H1 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 and voltage output DAC with internal reference for 4-20mA analog output 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 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 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: A Basic Guide to the HART Protocol: https://www.ti.com/lit/pdf/slaaeh0 What Is HART Protocol and How Does It Work?: https://www.ti.com/lit/pdf/sszt817 How to HART-enable Your Analog Input Module: https://www.ti.com/lit/pdf/sszt755 Implementing HART in 2-Wire Field Sensor-Transmitters: https://www.ti.com/lit/pdf/sbaa306 Implementing HART in PLC Analog Input Modules for Real-Time Communication in 4-20mA Systems: https://www.ti.com/lit/pdf/sbaa307 Implementing HART Communication with the DAC8760 Family: https://www.ti.com/lit/pdf/slaa572 Protection for HART I/O in Analog Input and Output Modules with TPS2661x: https://www.ti.com/lit/pdf/slvaf72 Improve Your Field Transmitter Designs with HART: https://www.ti.com/lit/pdf/sszt788 Highly Accurate, Loop-Powered, 4- to 20-mA Field Transmitter With HART Modem Reference Design: https://www.ti.com/lit/pdf/tidudf6 HART Enabled PLC Analog Input Module Reference Design: https://www.ti.com/lit/pdf/tidueg0 HART-Enabled Transmitter Based on an Evaluation Module Design: https://www.ti.com/lit/pdf/slaaer4 Design and Test of a HART-Enabled Field Transmitter for 4-20mA Loops: https://www.ti.com/lit/pdf/slaaeh8
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