M5Stack DAC 2 I2C Unit (GP8413)

M5Stack GP8413 Dual-Channel I2C DAC Unit

The M5Stack DAC2 Unit converts digital commands into two independent analog voltage outputs. Built around the GP8413, it provides 15-bit resolution and supports 0–5V or 0–10V output ranges for embedded control, signal generation, LED dimming, power-supply references, and industrial analog interfaces.

The host communicates through I2C. Hardware address selection supports addresses from 0x58 to 0x65, with 0x59 as the default. This allows up to eight devices to share a bus for as many as 16 analog output channels when the full system is planned correctly.

Generate Two Independent Analog Voltage Outputs

Use each channel for a separate control or reference signal. The product specification lists output voltage error below 0.2% and linearity error of 0.01%, but final system accuracy also depends on load impedance, supply quality, wiring, calibration, temperature, grounding, and downstream equipment.

Selectable 0–5V or 0–10V Range

Choose the output range according to the receiving equipment. Confirm the input limits and common-ground requirements of the connected controller, inverter, dimmer, power supply, or analog interface before applying a signal.

Multiple I2C Addresses for Expansion

Address selection through A2/A1/A0 supports multi-device expansion. Before adding several units, check bus pull-ups, cable length, address configuration, power budget, and startup behavior so outputs do not enter an unintended state.

Short-Circuit Protection Is Not Complete System Protection

The unit includes output short-circuit protection, but the surrounding system still needs appropriate wiring, current limits, grounding, transient protection, and fail-safe behavior. For safety-critical motion or process control, use independently rated protective controls.

Technical setup details are available in the M5Stack DAC2 documentation.