AD74413R Datasheet

• Quad-channel software configurable input/output circuit
• Screw terminals tolerant to ±40 V dc
• Line protectors to block power from the screw terminals to supplies
• User configurable modes
  • Voltage input
  • Current input
  • Voltage output
  • Current output
  • Digital input
  • RTD measurement
• Internal 16-bit, Σ-∆ ADC with optional 50 Hz and 60 Hz rejection
• 13-bit monotonic DACs
• Charge pump for true zero voltage output
• HART-compatible
• Internal temperature sensor, ±5°C accuracy
• On-chip diagnostics including open circuit and short-circuit detection
• SPI-compatible
• Temperature range: −40°C to +105°C
• 64-lead LFCSP

• Process control
• Factory automation
• Motor drives
• Building control systems 

The AD74413R is a quad-channel software configurable input/output solution for building and process control applications. The AD74413R contains functionality for analog output, analog input, digital input, resistance temperature detector (RTD), and thermocouple measurements integrated into a single chip solution with a serial peripheral interface (SPI).

The device features a 16-bit, Σ-Δ analog-to-digital converter (ADC) and four configurable, 13-bit digital-to-analog converters (DACs) to provide four configurable input/output channels and a suite of diagnostic functions. 

There are several modes related to the 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. 

The AD74413R contains a high accuracy 2.5 V internal reference to drive the DACs and the ADC.