MCP4725 DAC I2C converter 12-Bit Breakout Board


Digital-to-analog converter with I2C interface. The module allows you to receive signals in the form of analog voltage on any microcontroller that supports I2C. Powered with voltage between 2.7 and 5.5 V, has a resolution of 12-bits.


Insights
OUT- analog output
SDA- data line of the I2C bus
SCL - the clock line of the I2C bus
VCC- supply voltage range from 2.7 to 5.5 V
GND- ground of the system


Specification
Supply voltage: 2.7 to 5.5 V
Resolution: 12-bit
Communication interface: I2C
Built-in EEPROM memory
Module dimensions: 15 x 15 mm


Your microcontroller probably has an ADC (analog -> digital converter) but does it have a DAC (digital -> analog converter)??? Now it can! This breakout board features the easy-to-use MCP4725 12-bit DAC. Control it via I2C and send it the value you want it to output, and the VOUT pin will have it. Great for audio / analog projects, such as when you can't use PWM but need a sine wave or adjustable bias point.


We break out the ADDR pin so you can connect two of these DACs on one I2C bus, just tie the ADDR pin of one high to keep it from conflicting. Also included is a 6-pin header, for use in a breadboard. Works with both 3.3V or 5V logic.


Some nice extras with this chip: for chips that have 3.4Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz. There's an EEPROM so if you write the output voltage, you can 'store it' so if the device is power cycled it will restore that voltage. The output voltage is rail-to-rail and proportional to the power pin so if you run it from 3.3V, the output range is 0-3.3V. If you run it from 5V the output range is 0-5V.