DFRobot
Gravity: I2C 4-20mA DAC Module (Arduino Compatible)
The Gravity I2C 4-20mA DAC Module outputs 0–25 mA of current controlled via I2C, with high-accuracy 4–20 mA output available after calibration (0.2% linearit...
The Gravity I2C 4-20mA DAC Module outputs 0–25 mA of current controlled via I2C, with high-accuracy 4–20 mA output available after calibration (0.2% linearity error). Built around the GP8302 chip, it provides 12-bit resolution and is compatible with Arduino, enabling precise current-loop control of industrial devices such as motors, inverters, valves, and pumps.
The module uses a Gravity I2C interface for easy connection and requires an 18–24V power supply (24V recommended). It supports a maximum load resistance of 750Ω at 24V, with a start-up time under 2 ms and operating temperatures from −40°C to 125°C.
Key Features
- 0–25 mA Current Output – 4–20 mA with 0.2% accuracy after calibration
- 12-Bit Resolution – GP8302 DAC chip (0x000–0xFFF)
- Gravity I2C Interface – Simple connection to Arduino and compatible boards
- I2C Address – 0x58
- High Level Input – 2.7–5V I2C signal compatible
- Low Power – Less than 5 mA consumption, under 2 ms start-up
- Wide Temperature Range – −40°C to 125°C
Specifications
- DAC Chip – GP8302
- Power Supply – 18–24V DC (24V recommended)
- Output Current – 0–25 mA
- Accuracy – 0.5% before calibration, 0.2% after calibration
- Max Load Resistance – 450Ω @ 18V, 750Ω @ 24V
- Power Consumption – <5 mA
- Start-Up Time – <2 ms
- Operating Temperature – −40°C to 125°C
Ideal For
- Industrial 4–20 mA current loop control
- Motor, inverter, valve, and pump automation
- Function signal generation
- Equipment debugging and test device prototyping
Package Contents
- 1× Gravity I2C 4-20mA DAC Module
- 1× Gravity I2C/UART Sensor Connector
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 12-bit resolution
- 12-bit resolution means the sensor’s measurement is divided into 4096 possible digital values. Higher resolution can make small changes in motion or tilt easier to detect, as long as the sensor range and noise are suitable for the project.
- DAC
- A digital-to-analogue converter turns numbers from the microcontroller into a real analogue voltage. It matters if you want to generate simple waveforms, audio-style signals, or variable control voltages rather than just on/off outputs.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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Supplier page — dfrobot.com
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Related Tutorials
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