Users are required an additional high-precision digital multimeter to complete the calibration, the

specific steps are as follows:

1. Connect the module to the Arduino according to the connection diagram above and set I2C address

to 0x60 by ADDR switch on the module. If I2C address 0x61 is preferred, you need to modify the first

parameter of the function DAC.init() in the code below.

2. Install the MCP4725 library

3. Open Arduino IDE and upload the following code to Arduino UNO

4. Use the multimeter to measure the output voltage of VOUT and change the value of

REF_VOLTAGE accordingly. For example, VOUT = 4950mV, the "#define REF_VOLTAGE 5000"

should be revised to "#define REF_VOLTAGE 4950". Calibration completed.



Change the value of OUTPUT_VOLTAGE (unit in mV) to your desired analog output voltage. This

value should be smaller than REF_VOLTAGE or the maximum output voltage will be limited to

REF_VOLTAGE. Before using the sample code below, write the calibration value to REF_VOLTAGE

first to get a more accurate output voltage.

/*

* file OutputVoltage.ino

*

* @ https://github.com/DFRobot/DFRobot_MCP4725

*

* connect MCP4725 I2C interface with your board (please reference board comp

atibility)

*

* Output a constant voltage value and print through the serial port.

*

* Copyright

[DFRobot](http://www.dfrobot.com), 2016

* Copyright

GNU Lesser General Public License

*

* version

V1.0

* date

2018-1-15

*/

#include "DFRobot_MCP4725.h"

#define

REF_VOLTAGE

5000

DFRobot_MCP4725 DAC;