MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface

MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface info

MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface 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. This breakout board is great for audio / analog projects, such as when you can't use PWM but need a sine wave or adjustable bias point.

The ADDR pin is added 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. The board works with both 3.3V or 5V logic.

Some nice extras with MCP4275:

• 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.

Adafruit has an easy-to-use Arduino library and tutorial with a triangle-wave and sine-wave output example that can be used with any Arduino/Arduino-like microcontroller or ported to any different microcontroller with I2C host.

Wiring MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface up is easy. Just connect VDD to your microcontroller power pin (3-5V), GND to ground, SDA to I2C Data, SCL to I2C Clock and listen on VOUT.

MCP4725 Breakout Board - 12-Bit DAC - General Specifications

• 12-bit digital to analog converter
• I2C interface
• Great for audio/analog projects
• Two selectable I2C addresses
• Supports fast I2C

MCP4725 Breakout Board - 12-Bit DAC - Technical Specifications

• I2C Addresses: I2C 7-bit address between 0x62-0x63, selectable with jumpers

Documents

MCP4725 Datasheet

Adafruit Arduino library and tutorial (triangle-wave and sine-wave)

References

Adafruit Web Site: https://www.adafruit.com/product/935