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Adafruit 12-Bit DAC with I2C Interface

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About this product

Overview

  • Works with 3.3V or 5V logic
  • Control via I2C
  • For chips that have 3.4Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz

Product overview

• Works with 3.3V or 5V logic• Control via I2C• For chips that have 3.4Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz• Has an EEPROM so it can store an output voltage

Your microcontroller probably has an ADC (analogue -> 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 / analogue 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.

It says great for Audio projects. Does this mean I can use it to convert a PWM audio signal from a class D amplifier to true analogue?

Asked by: Japie01
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9500 or email technical@maplin.co.uk
Answered by: Billy
Date published: 2016-10-20
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