Gravity: I2C 4-20mA DAC Module (Arduino Compatible)

Introduction

This is an I2C DAC module that outputs 0–25mA current. It provides accurate 4–20mA current output after calibration, making it suitable for controlling industrial devices such as motors, inverters, valves, and pumps via Arduino or other microcontrollers.

Designed to convert digital signals into standard 4–20mA industrial control signals, this module serves as a bridge between microcontroller platforms and industrial systems.

With I2C communication and provided sample code, users can easily control the output current by setting digital values, enabling quick integration into automation and control projects.

This DAC module requires an external 18–24V power supply for proper 4–20mA loop operation.

Function Indication

Hardware Connection

Features

0-25mA output, more accurate current within 4-20mA available after calibration
Gravity interface, I2C communication
High accuracy, 0.2% linearity error
18-24V power supply

Applications

Function signal generator
Automatic controller for lighting or fountain
Automatic and quick transformation of small equipment
Electromechanical equipment debugging
Transformation of small test device

Specification

Chip Type: GP8302
Input Signal Range: 12Bit, 0x000-0xFFF (0-25mA)
Input I2C Signal High Level: 2.7V-5V
Power Supply: 18V-24V (24V recommended)
Accuracy: 0.5% before calibration, 0.2% after calibration
Power Consumption: ＜5mA
Start-up Time: ＜2ms
Operating Temperature: -40°C to 125°C
Load Resistance: Maximum 450Ω load capacity for 18V power supply, maximum 750Ω for 24V
Output Current: 0-25mA
I2C Address: 0x58