Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module

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:

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:

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

DFR1034-GP8503 (2-Channel 12bit I2C to 0-2.5V/VCC DAC Module)

FUNCTIONS

This is a 2-channel analog voltage output DAC module with I2C communication, 12-bit resolution, and 0.1% output voltage linearity error. It is well-suited for control projects operating within the 3.3V range, such as ESP32, Raspberry Pi, STM32, and other microcontrollers that require analog signal output.

FEATURES

DIMENSION

FUNCTIONAL DIAGRAM

Name Description Remarks
12C Interface + Positive terminal of the power supply (3.3V-5V)
- Negative terminal of the power supply
C SCL
D SDA
0-2.5V/0-VCC SwitchingSwitch 0-VCC Switch output voltage to 0V-VCC(Supply voltage)
0-2.5V Switch output voltage to 0V-2.5V
Voltage Signal Output Port VOUT0 Positive terminal of output voltage signal 0
VOUT1 Positive terminal of output voltage signal 1
GND Negative terminal of the output voltage signal

SPECIFICATIONS

TUTORIAL

In this example, we will demonstrate the output of different voltage values in two states.

Input signal value range:0-4095

In the state of 0-2.5V:

In the state of 0-VCC:

SOFTWARE REQUIREMENTS

HARDWARE CONNECTION

SAMPLE CODE

#include <DFRobot_GP8XXX.h>

DFRobot_GP8503 GP8503;

void setup() {

  Serial.begin(9600);

  while(GP8503.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);
  }

  /**
   * @brief. Configuring different channel outputs for DAC values
   * @param data. Data values corresponding to voltage values
   * @n (0 - 4095).This module is a 12-bit precision DAC module, hence the values ranging from 0 to 4095 correspond to voltages of 0-2.5V or 0-VCC respectively. The specific voltage range depends on the selection of the module's voltage fluctuation switch.
   * @param channel Output Channel
   * @n  0:Channel 0
   * @n  1:Channel 1
   * @n  2:AII channels
   */
  GP8503.setDACOutVoltage(2654,0);//At 0-2.5V voltage range, Channel 0 outputs 1.62V, whereas at 0-VCC voltage range, Channel 0 outputs 3.23V.
  GP8503.setDACOutVoltage(1095,1);//At 0-2.5V voltage range, Channel 1 outputs 0.668V, whereas at 0-VCC voltage range, Channel 1 outputs 1.334V.

  delay(1000);

  //The set voltage is saved internally in the chip for power-off retention.
  //GP8503.store();
}

void loop() {

}

RESULT

After downloading the program, the measured output voltage of channel 0 under the 0-2.5V state is 1.62V, and the output voltage of channel 1 is 0.668V. Under the 0-VCC state, the actual output voltage of channel 0 is 3.23V, and the output voltage of channel 1 is 1.334V.

More Documents

DFR1034 Documents:

DFR1034-Schematics.pdf

DFR1034_Dimensions.pdf

DFR1034_3D文件.rar

DFR1034_2D_CAD File.rar

DFR1034_GP8503 Datasheet.pdf

FAQ

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