Adafruit DAC6578 Breakout - 8-Channel 10-bit I2C DAC

Overview

Adafruit DAC6578 Breakout brings eight voltage-output DAC channels to a single easy-to-use I2C board. Built around the DAC6578, it gives you 8 independent 10-bit DAC outputs for generating analog voltages from a microcontroller or single-board computer.

The board works with both 3.3V and 5V power and logic, making it suitable for Arduino, Feather, Raspberry Pi, and other I2C-capable platforms. With onboard support circuitry and STEMMA QT / Qwiic-compatible connectors, integration is straightforward whether you are prototyping on a breadboard or building a neater cable-based setup.

This DAC is ratiometric, so the output range depends on the reference voltage: zero-scale maps to ground, and full-scale maps to the reference. By default, the reference is tied to VCC, but you can cut the Vref jumper and feed an external reference voltage up to the VCC level for applications that need a more precise top-end output.

Features

• Eight 10-bit DAC channels in one package
• I2C-compatible 2-wire serial interface
• Works with 3.3V or 5V logic and supply rails
• Default Vref tied to VCC for full-range ratiometric output
• External reference support via configurable Vref jumper
• STEMMA QT JST SH connectors, compatible with SparkFun Qwiic ecosystems
• Can share the I2C bus with other compatible sensors and peripherals
• Power-on reset to zero scale
• Supported with example code for Arduino, CircuitPython, and Python

Note: QT / STEMMA QT cable is not included.

Pinout & Connections

The breakout exposes the core power, reference, I2C, and output connections needed for quick integration into analog control, waveform generation, or test setups.