AD74413R Quad-Channel Software Configurable I/O Analog Devices AD74413R Quad-Channel Software Configurable Input/Output solution for building and process control applications. AD74413R contains functionality for analogue output, analogue input, digital input, and resistance temperature detector (RTD) measurements. It also contains thermocouple measurements integrated into a single chip solution with a serial peripheral interface (SPI). The device features a 16-bit, Σ-Δ analogue-to-digital converter (ADC), and four configurable, 13-bit digital-to-analogue converters (DACs). The DACs provide four configurable input/output channels and a suite of diagnostic functions. There are several modes related to AD74413R. These modes are voltage output, current output, voltage input, externally powered current input, loop-powered current input, external RTD measurement, digital input logic, and loop-powered digital input. AD74413R contains a high accuracy 2.5V internal reference to drive the DACs and the ADC.