INTRODUCTION

DAC series modules are a range of products that can be controlled through I2C or PWM signals to generate voltage or current output signals. They possess the capability to produce a variety of analog voltage or current signals, including 0-5V, 0-10V, 0-2.5V, 0-VCC, and 0-25mA.

An analog quantity refers to the continuous variation of voltage magnitude (or current magnitude) within a specific range. Due to its stability, long transmission distance, and ease of use, it has found widespread application in the field of industrial automation control, including:

Motor speed control
Sound intensity control
Temperature regulation
Adjustment of light brightness
Valve angle modulation

etc.

This series of DAC products not only offers a variety of output signal ranges, but also provides three selectable resolutions: 8-bit, 12-bit, and 15-bit. It allows for the choice of either single-channel or dual-channel configurations, and multiple modules can be cascaded to form a multi-channel output. When coupled with Arduino controllers, Raspberry Pi, STM32, and similar controllers, it finds application in various automation control scenarios, including:

Laboratory testing equipment
Automatic motor speed control
Indoor and outdoor lighting control
Automated volume adjustment
Backlight control for displays

etc.

The following table presents the functional parameters of each DAC product for reference in the selection process.

DFR1071-GP8211S （1-Channel 15-bit I2C to 0-5V/10V DAC Module）

FUNCTIONS

This is a 1-channel DAC module with I2C communication, a resolution of 15-bit, and 0.01% output voltage linearity error, capable of generating analog voltage outputs of 0-10V or 0-5V. The 0-10V or 0-5V voltage output is a standard driving method. It can be widely used in automation control scenarios such as lighting adjustment, frequency converters, valve regulation, and pump control,etc. This product can drive a variety of 0-10V or 0-5V controlled devices available in the market through Arduino programming.

The high precision and resolution of this module make it suitable for control scenarios that require higher signal accuracy, such as fine speed control or angle control.

FEATURES

Support 3.3V-5V power supply.
Output voltage linearity error of 0.01%.
Two channels of voltage output, either 0-5V or 0-10V, enabling connection and control of standard analog voltage devices.
Gravity interface, I2C communication, Arduino control, suitable for program automation control.
The high precision and resolution of this module make it suitable for control scenarios that require higher signal accuracy.

DIMENSION

FUNCTIONAL DIAGRAM

Name	Description	Remarks
I2C Interface	+	Positive terminal of the power supply (3.3V-5V)
	-	Negative terminal of the power supply
	C	SCL
	D	SDA
Voltage Signal Output Port	VOUT	Positive terminal of output voltage signal
	GND	Negative terminal of the output voltage signal

SPECIFICATIONS

Chip Type: GP8211S
Operating Voltage: 3.3V-5V
Output Voltage: 0-5V or 0-10V
Number of Channels: 1 channel
Communication Method: I2C
Resolution: 15-bit
Value Range: 0 - 32767 corresponding to 0-5V or 0-10V
Output voltage linearity error: 0.01%

TUTORIAL

In this example, we will demonstrate the correlation between the input signal values and the corresponding voltage output in the channels.

Input signal value range: 0-32767

Input value of 21457, resulting in an output voltage of 6.548V

SOFTWARE REQUIREMENTS

Download Arduino IDE： Click to download Arduino IDE
Download Arduino libraries： Click to download https://github.com/DFRobot/DFRobot_GP8XXX

Click the link to view：How to install the library?;

Note: All modules in this series utilize the same library.

HARDWARE CONNECTION

SAMPLE CODE

#include <DFRobot_GP8XXX.h>

DFRobot_GP8211S GP8211S;

void setup() {

  Serial.begin(9600);

  while(GP8211S.begin()!=0){
    Serial.println("Communication with the device has encountered a failure. Please verify the integrity of the connection or ensure that the device address is properly configured.");
    delay(1000);
  }
GP8211S.setDACOutRange(GP8211S.eOutputRange10V);
  /**
   * @brief. Configuring different channel outputs for DAC values
   * @param data. Data values corresponding to voltage values
   * @n （0 - 32767）.This module is a 15-bit precision DAC module, hence the values ranging from 0 to 32767 correspond to voltages of 0-10V respectively.
   */
  GP8211S.setDACOutVoltage(21456);//Output 6.548V

  delay(1000);

  //The set voltage is saved internally in the chip for power-off retention.
  //GP8211S.store();
}

void loop() {

}

RESULT

After downloading the program, the actual output voltage of channel was measured as 6.548V using a voltmeter.

FAQ

For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

Get 1-Channel I2C to 0-10V DAC Module from DFRobot Store or DFRobot Distributor.

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SKU_DFR1071_1_Channel_15bit_I2C_to_0-10V_DAC WIKI