Adafruit
Adafruit DAC7578 Breakout - 8 x Channel 12-bit I2C DAC
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The Adafruit DAC7578 Breakout provides eight independent 12-bit digital-to-analogue converters in a single package, all controllable over I2C. Set precise ou...
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The Adafruit DAC7578 Breakout provides eight independent 12-bit digital-to-analogue converters in a single package, all controllable over I2C. Set precise output voltages on up to eight channels simultaneously, making it ideal for multi-channel voltage control, LED dimming, or sensor calibration.
The DAC7578 is ratiometric — output 0 equals ground and output 4095 equals the reference voltage. By default, Vref is tied to the power pin, but you can cut a jumper to supply an external precision reference for more accurate output control.
Key Features
- 8× 12-Bit DAC Channels – Independent voltage outputs from a single chip with 4096-step resolution
- I2C Interface – Simple two-wire control from any microcontroller or SBC
- 3.3V or 5V Compatible – Works with any logic level
- Ratiometric Output – 0 to Vref range (Vref tied to power by default, cuttable jumper for external reference)
- STEMMA QT / Qwiic Connectors – Two JST SH connectors for easy I2C daisy-chaining
Also Available
- DAC6578 Breakout – 8-channel 10-bit version
Ideal For
- Multi-channel voltage control and waveform generation
- LED brightness control across multiple channels
- Sensor calibration and test equipment
- Analogue signal simulation
Package Contents
- 1× Adafruit DAC7578 Breakout (assembled)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- DAC
- A digital-to-analogue converter turns numbers from the microcontroller into a real analogue voltage. It matters if you want to generate simple waveforms, audio-style signals, or variable control voltages rather than just on/off outputs.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
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