Low power modems designed for industrial process control and automation applications

The Texas Instruments DAC8740H, DAC8741H, and DAC8742H are HART, FOUNDATION Fieldbus, and PROFIBUS PA compatible low power modems created for industrial process control and industrial automation applications. In HART mode, the devices integrate all of the required circuitry to operate as half-duplex HART physical layer modems, in either slave or master configurations with the minimum of external components for filtering. In FOUNDATION Fieldbus mode, the devices integrate all of the required circuitry to operate as half-duplex FOUNDATION Fieldbus compatible H1 Controllers and MAUs. The data stream can be transferred from the MCU through either a UART interface or an integrated FIFO accessed by a SPI interface. The SPI interface includes an SDO pin for daisy-chain support, various interrupts, and other extended features.