Boardoza GP8403 DAC Board Breakout Board

The Boardoza GP8403 DAC Board is a high-precision dual-channel digital-to-analog converter (DAC) breakout board designed for applications requiring accurate analog voltage generation from digital signals. Based on the GP8403, the board provides two independent 12-bit analog output channels that can be controlled over the I²C communication interface.

Supporting both 0–5V and 0–10V selectable output ranges, this breakout board is ideal for industrial automation, signal generation, lighting control, motor control, programmable analog outputs, PLC interfacing, laboratory equipment, and other embedded systems requiring reliable analog voltage outputs.

Front Side	Back Side

---

Key Features

• GP8403-Based DAC: Dual independent analog output channels.
• 12-Bit Resolution: Smooth and accurate voltage generation with 4096 output levels.
• Wide Input Supply Voltage Range: Accepts 3.3VDC to 12VDC input through the onboard voltage regulator.
• Selectable Output Range: Supports both 0–5V and 0–10V analog outputs.
• I²C Communication: Easy integration with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers.
• Multi-Device Support: Supports up to 8 configurable I²C addresses on the same bus.
• Protected Outputs: Built-in short-circuit protection improves reliability.
• Industrial Ready: Suitable for automation, process control, and analog interfacing applications.

---

Technical Specifications

Model: GP8403
Manufacturer: Boardoza
Manufacturer IC: Shenzhen Keyi Electronics
Functions: Dual-channel Digital-to-Analog Converter (DAC)
DAC Resolution: 12-bit
Communication Interface: I²C
Supply Voltage: 3.3VDC – 12VDC
Output Voltage: Selectable 0–5V / 0–10V by register
Maximum Output Current: Up to 20mA per channel
Output Voltage Accuracy: ±0.5% (typical)
Supported I²C Devices: Up to 8 on a single bus
Operating Temperature: -40°C to +85°C
Board Dimensions: 40mm × 20mm

---

Board Pinout

( J1 ) I²C Connector

Pin Number	Pin Name	Description
1	VCC	Power Supply (3.3VDC–12VDC)
2	SCLK	I²C Serial Clock
3	SDA	I²C Serial Data
4	GND	Ground

( J2 ) Analog Output Connector

Pin Number	Pin Name	Description
1	OUT0	Analog Voltage Output Channel 0
2	GND	Ground
3	OUT1	Analog Voltage Output Channel 1

---

Board Dimensions

---

Step Files

Boardoza GP8403.step

---

Datasheet

GP8403 Datasheet.pdf

---

Version History

• V1.0.0 - Initial Release

---

Support

• If you have any questions or need support, please contact [email protected]

---

License

This repository contains both hardware and software components:

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.

Software/Firmware

All software and firmware are licensed under BSD 3-Clause License.