ADI AD74412R/AD74413R: 4‑Channel, Software‑Configurable I/O for Modern Building Automation

ADI’s AD74412R and AD74413R deliver a highly adaptable 4‑channel I/O solution that integrates analog output, analog input, digital input, and RTD measurement—all within a single SPI‑compatible chip. These devices are engineered to meet the demands of contemporary building control and process automation, offering precise, low‑noise performance in a compact footprint.

By allowing each channel to be reconfigured through software, the AD74412R/AD74413R eliminate the need for extensive rewiring when system requirements evolve. Manufacturers can deploy a single, programmable module that replaces a fleet of aging fixed‑function I/O boards, while end users gain the flexibility to adapt the device to any installation from the control room. This approach reduces hardware complexity, lowers maintenance costs, and shortens deployment times.

Beyond its standalone capabilities, the AD74412R/AD74413R serve as a robust bridge to Ethernet‑based control networks. The devices can translate signals from HART‑enabled 4‑20 mA sensors and actuators into 10BASE‑T1L or 100 M fiber backhaul, enabling seamless integration with modern industrial Ethernet architectures.

The chips feature a 16‑bit sigma‑delta ADC, four 13‑bit DACs, and a full suite of diagnostic functions that support all four configurable input/output channels. Encapsulated in 64‑lead LFCSP packages, the AD74412R and AD74413R are priced at $7.47 and $8.55 respectively in 1,000‑unit lots. Evaluation boards are available to accelerate development and validation.

>> This article was originally published on our sister site, EDN.