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28 ADI | Industry 4.0 and Beyond AD74413R has a highly accurate internal reference to drive DACs and ADCs in cost-sensitive applications, while an external reference can be used when the highest performance is required. Possible Functions and Operating Modes Each channel's function overview is shown in Table 1. The component can support voltage output, current output, voltage input, current input (externally powered), current input (loop powered), external RTD measurement, digital input logic, and loop-powered digital input. It also has a high-impedance mode as a default function after power-up or a device reset. The voltage output amplifier can generate unipolar voltages up to 11V. An internal low-voltage charge pump allows the amplifier to generate a true zero output voltage. In this mode, an external sense resistor provides current feedback (force voltage measure current FVMI approach) while negative feedback over the SENSEL_x pin regulates the correct voltage level. In current output mode, the DAC provides a current output (typically 0mA to 25mA) regulated by sensing the differential voltage across the sensor resistor (SENSEL_x and SENSEH_x pins). To decrease power dissipation on the die when a low resistive load is present, one can connect an external PMOS to pass 0mA to 25mA output current. Table 1: Possible Function Selections. (Source: Analog Devices Inc.) Figure 3: Typical application circuit of the AD7441xR with an ADP1032 power management unit. (Source: Analog Devices Inc.) 3