Gravity I2C 4-20mA DAC Module

The DFROBOT Gravity I2C 4-20mA DAC Module (DFR0972) is an Arduino-compatible digital-to-analogue converter designed for precision current output. It generates a 0-25mA signal and, after calibration, provides an exceptionally accurate 4-20mA output, the industry-standard signal for process control. This makes it perfectly suited for interfacing with a vast array of industrial devices directly from an Arduino or other microcontroller.

Utilising the high-performance GP8302 chip, the module achieves remarkable accuracy with a linearity error of just 0.2% post-calibration. It features a convenient Gravity interface for plug-and-play connectivity with other Gravity ecosystem sensors and a straightforward I2C communication protocol, simplifying integration into your projects.

Key Features & Applications

This versatile module is ideal for automating and controlling industrial equipment. It can be programmed via Arduino to drive and regulate devices such as variable speed motors, inverters, control valves, and pumps. Its applications extend to creating function signal generators, designing automatic controllers for lighting displays or fountains, and facilitating the rapid prototyping or debugging of electromechanical systems and small test rigs.

Technical Specifications & Performance

The module operates from a wide 18-24V DC power supply and is compatible with I2C signal levels from 2.7V to 5V, ensuring broad microcontroller compatibility. It boasts low power consumption (<5mA) and a rapid start-up time of under 2ms for responsive system control. Its robust design supports an operating temperature range from -40°C to 125°C, making it suitable for demanding environments. The load capacity is up to 450 ohms with an 18V supply and 750 ohms with 24V. The fixed I2C address is 0x58.

Supplied as a compact module, it is an essential component for engineers, hobbyists, and educators looking to bridge the g