AD74412R

Data Sheet FEATURES Quad-channel software configurable input/output circuit Screw terminals protected to ±40 V Line protectors to block power from the screw terminals to supplies Six 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 Internal temperature sensor, 5°C accuracy On-chip diagnostics including open circuit and short-circuit detection Robust architecture SPI Temperature range: −40°C to +85°C 64-lead LFCSP APPLICATIONS Building control systems Process control Industrial automation Quad-Channel, Software Configurable Input/Output AD74412R GENERAL DESCRIPTION The AD74412R is a quad-channel software configurable input/output solution for building and process control applications. The AD74412R contains functionality for analog output, analog input, digital input, and resistance temperature detector (RTD) measurements integrated into a single chip solution with an interface compatible with the serial port interface (SPI). The device features a 16-bit, Σ-∆ 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 AD74412R. These modes are voltage output, current output, voltage input, externally powered current input, loop po...