DFRobot - Gravity: GP8503 2-Channel 12-bit I2C DAC Module (0-2.5V / 0-VCC)

Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module is a compact dual‑channel digital‑to‑analog converter designed for embedded control systems requiring precise analog voltage output. Built around the GP8503 chip with 12‑bit resolution and 0.1% precision, this I2C DAC board converts digital commands into stable voltage signals for control and automation tasks. The analog output module operates from 3.3V–5V and integrates smoothly with common development platforms including ESP32, Raspberry Pi, STM32, and Arduino. Dual analog outputs and flexible voltage range support make this gravity‑series DAC suitable for robotics control, signal generation, and automated analog adjustment systems.

Figure: Functional Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module

Figure: Wiring Diagram of Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module and Arduino UNO

High‑Precision 12‑bit Digital‑to‑Analog Conversion

This dual‑channel analog signal generator converts digital I2C commands into stable voltage outputs with 12‑bit resolution, providing 4096 adjustable output levels. Precision control with only 0.1% voltage error and 0.1% linearity deviation enables reliable analog signal generation for control loops, signal simulation, and calibration tasks. Accurate DAC performance supports applications such as motor speed regulation, lighting intensity control, and adjustable reference voltage generation across a wide range of embedded systems.

Selectable Output Voltage Range for Flexible Control

Each channel of this I2C DAC module outputs either 0–2.5V or 0–VCC, allowing integration with various analog control circuits and voltage‑driven devices. Such flexibility allows the DAC board to act as a programmable voltage source, replacing traditional potentiometers or manual tuning components. Adjustable voltage outputs simplify implementation of analog modulation tasks such as brightness control, audio amplitude adjustment, and analog signal testing in automated systems.

Gravity Interface with Expandable DAC Series Ecosystem

The gravity‑series analog output board uses a standardized Gravity I2C interface, enabling rapid plug‑and‑play wiring and simplified integration into development platforms and sensor networks. Multiple DAC modules from the same product family support cascading, making multi‑channel analog control systems easy to build. Various resolution options and channel configurations are available across the DAC series; detailed comparison guidance can be found in the Selection Guide of DAC Modules.

Typical applications include programmable motor speed control, adaptive lighting systems, sound intensity modulation, and automated display backlight adjustment. The compact analog control module also serves as a practical signal generation tool in robotics prototypes, embedded automation equipment, laboratory testing setups, and educational electronics platforms requiring stable voltage output signals.

Selection Guide

Product Name

Gravity: I2C 12-Bit DAC Module

Gravity: 2-Channel I2C DAC Module (0-10V)

Gravity: I2C 4-20mA DAC Module (Arduino Compatible)

Gravity: GP8211 I2C 15-bit DAC Module (0-5V/10V)

Gravity: GP8101S 1-Channel PWM to 0-5V/10V DAC Module

Gravity: GP8501 2-Channel PWM to 0-2.5V/VCC DAC Module

Gravity: GP8413 2-Channel 15-bit I2C to 0-5V/10V DAC Module

Gravity: GP8512: 1-Channel 15bit I2C to 0-2.5V/VCC DAC Module

Gravity: GP8630N I2C/PWM to ±10V / 4-20mA DAC Module (16-bit)

Gravity: GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module

Gravity: GP8600 1-Channel I2C & PWM to 0-5V / 0-10V / 4-20mA DAC Module (16-bit)

Figure

SKU

DFR0552

DFR0971

DFR0972

DFR1071

DFR1036

DFR1037

DFR1073

DFR1035

DFR1230

DFR1034

DFR1229

Description

I2C 12-Bit DAC

2-Ch 0-10V DAC

4-20mA Current DAC

1-Ch 15-Bit (0-10V)

1-Ch PWM (0-10V)

2-Ch PWM (0-2.5V)

2-Ch 15-Bit (0-10V)

1-Ch 15-Bit (0-2.5V)

Hi-Res ±10V / 4-20mA

2-Ch 12-Bit (0-2.5V)

Hi-Res 0-10V / 4-20mA

Comm.

I2C

I2C

I2C

I2C

PWM

PWM

I2C

I2C

I2C/PWM

I2C

I2C/PWM

Res.

12-bit

12-bit

12-bit

15-bit

8-bit

8-bit

15-bit

15-bit

16-bit

12-bit

16-bit

Channels

1

2

1

1

1

2

2

1

1

2

1

Output Range

0~VCC

0-10V / 0-5V

4-20mA (0-25mA)

0-10V / 0-5V

0-10V / 0-5V

0-2.5V / 0-VCC

0-10V / 0-5V

0-2.5V / 0-VCC

±10V, 0-10V, 4-20mA

0-2.5V / 0-VCC

0-10V, 0-10V, 4-20mA

Chip

MCP4725

GP8403

GP8302

GP8211S

GP8101S

GP8501

GP8413

GP8512

GP8630N

GP8503

GP8600

Key Features

Classic model, with EEPROM, cost-effective

Dual-channel industrial voltage, cascade up to 16 devices

Industrial current loop, requires 18-24V power

High precision (0.01%), single channel

PWM driven, easy to use, industrial voltage

PWM driven, dual channel, low voltage control

High precision, dual channel, industrial voltage

High precision, single channel, low voltage control

Flagship, supports bipolar (negative voltage) output

Medium precision, dual channel, low voltage control

16-bit ultra-high precision, multi-function all-in-one

Add to Cart

• Supports 3.3V–5V power supply
• Output voltage error less than 0.1%
• Output voltage linearity error of 0.1%
• Dual voltage output channels supporting 0–2.5V or 0–VCC ranges
• Gravity interface with I2C communication for microcontroller automation control

• Motor rotational speed regulation
• Sound intensity modulation
• Indoor and outdoor luminance modulation
• Display panel backlight automatic adjustment

• Operating voltage: 3.3V to 5V
• Communication Method: I2C
• Chip Type: GP8503
• Resolution: 12-bit
• Output Voltage: 0-2.5V or 0-VCC
• Number of channels: 2 channels
• Value Range: 0 - 4095 corresponding to 0-2.5V or 0-VCC
• Output voltage: 0.1%
• Output voltage linearity error: 0.1%

• GP8503 2-Channel 12bit I2C to 0-2.5V/VCC DAC Module ×1
• Gravity-4P I2C/UART Sensor Cable × 1