M5Stack DAC 2 I2C Unit (GP8413)

The M5Stack DAC 2 I2C Unit (GP8413) is a compact and high-performance digital-to-analog signal conversion module designed for professional and industrial applications. Also referred to as the M5Stack DAC 2 or DAC2 Unit, this device offers outstanding precision, scalability, and robust safety features.

At its core, the DAC2 Unit utilizes the GP8413 chipset, capable of 15-bit resolution digital-to-analog conversion, outputting two independent analog voltages in the 0–5V or 0–10V range. With up to 0.01% linearity and a voltage error margin of only 0.2%, it ensures highly reliable and stable analog signal generation.

Key Features of M5Stack DAC 2 I2C Unit (GP8413)

• 15-bit High-Precision DAC Output
  Converts digital signals into two independent 0–5V or 0–10V analog outputs with exceptional accuracy.
• I2C Communication (Default Address: 0x59)
  Easy and reliable data transmission with support for multiple parallel connections thanks to a 3-bit hardware address, enabling up to 8 DAC2 Units on a single I2C bus.
• High Precision, Minimal Error
  Achieves 0.01% linearity and maintains a low output voltage error (0.2%), delivering professional-grade analog signal quality.
• Built-in Short-Circuit Protection
  Protects the module by automatically disabling output in case of a short between the output pins and ground.
• Compact, Reliable, and Expandable Design
  Perfect for use in scalable IoT and industrial environments.

Communication Protocol

The M5Stack DAC 2 communicates using the I2C protocol, with a default address of 0x59. Thanks to address configurability, multiple DAC2 Units can operate simultaneously in complex systems, offering flexibility for advanced designs.

Typical Applications for the DAC2 Unit

• General Digital-to-Analog Signal Conversion
  Seamlessly translate digital commands into precise analog voltages.

• Motor Speed Control
  Achieve fine-grained motor control with adjustable analog voltage output.

• LED Dimming Control
  Enable smooth and programmable brightness adjustments for LED systems.

• Industrial Inverter and Power Supply Systems
  Generate reliable analog references for inverters and voltage regulators.

• Industrial Analog Signal Isolation
  Enhance signal integrity and system stability with precision DAC outputs.

• Smart Factory and IoT Applications
  Integrate precise analog controls into automated industrial systems.

Includes

• 1x DAC2 Unit
• 1x VH3.96-4P
• 1x Sticker

Applications

• Universal signal conversion
• Motor speed regulation, LED dimming
• Inverter, power supply
• Industrial analog signal isolation

Specification

FAQs – M5Stack DAC 2 I2C Unit (GP8413)

Q1: What communication protocol does the M5Stack DAC 2 Unit use?

A:
The M5Stack DAC 2 Unit uses the I2C communication protocol with a default address of 0x59. This allows for easy connection and reliable data transmission between the DAC2 Unit and microcontrollers like M5Core.

Q2: How many DAC2 Units can I connect in one system?

A:
Thanks to its 3-bit hardware address configuration, you can connect up to 8 DAC2 Units in parallel on the same I2C bus, enabling flexible and scalable system designs.

Q3: What is the resolution and accuracy of the M5Stack DAC 2 I2C Unit?

A:
The DAC2 Unit provides a 15-bit digital-to-analog conversion, achieving up to 0.01% linearity and maintaining a very low output voltage error of only 0.2%. This ensures high precision for industrial and professional applications.

Q4: Does the DAC2 Unit offer any protection features?

A:
Yes, the DAC2 Unit is equipped with short-circuit protection. If the output pins are accidentally shorted to ground, the module automatically enters protection mode to prevent damage.

Q5: What voltage ranges does the DAC2 Unit support?

A:
The M5Stack DAC 2 can output two independent analog voltages, either in the 0–5V or 0–10V range, making it versatile for different application requirements like motor speed control, LED dimming, and signal isolation.

Q6: What are typical use cases for the M5Stack DAC 2 Unit?

A:
Typical applications include:

• Motor speed control

• LED brightness adjustment

• Signal conversion in industrial systems

• Power inverter reference signal generation

• Analog signal isolation in smart factories and IoT solutions