INA219 DC Current Measurement Sensor Module
The INA219 DC Current Measurement Sensor Module is a high-accuracy current sensing module designed for monitoring DC voltage, current, and power in embedded and electronic systems. Based on the Texas Instruments INA219 current/power monitor IC, it communicates through the I²C interface, making it easy to integrate with Arduino, Raspberry Pi, ESP32, STM32, and other microcontroller platforms. The module measures the voltage drop across a precision shunt resistor to accurately calculate load current while also monitoring the supply bus voltage.
The module features a programmable-gain amplifier (PGA) and a high-resolution 12-bit ADC, allowing precise measurements across a wide range of currents and voltages. It is widely used in battery-powered devices, solar energy systems, power supplies, IoT devices, robotics, and energy monitoring applications. The INA219 can simultaneously measure bus voltage and shunt voltage, enabling direct power calculation without additional components.
Features:
- Based on the Texas Instruments INA219 current monitor IC.
- Measures DC current, voltage, and power simultaneously.
- High-accuracy current sensing.
- I²C digital communication interface.
- Programmable gain amplifier.
- Built-in 12-bit ADC.
- Bi-directional current measurement capability.
- Configurable measurement range.
- Compact module design.
- Low power consumption.
- Compatible with 3.3V and 5V microcontrollers.
- Easy integration with embedded systems.
- Ideal for battery and power monitoring applications.
Specifications:
| Specification | Value |
|---|---|
| Main IC | INA219 |
| Communication Interface | I²C |
| ADC Resolution | 12-bit |
| Supply Voltage | 3V – 5.5V DC |
| Bus Voltage Range | 0V – 26V |
| Maximum Measurable Current* | ±3.2A |
| Shunt Resistor | 0.1Ω |
| Current Measurement | Bi-directional |
| Power Measurement | Supported |
| Operating Temperature | -40°C to +125°C (IC) |
Pinout:
- VCC = 3-5V power for the IN219 IC. Typically connects to 3.3 or 5V from the MCU.
- GND = Ground connects to MCU and should also be in common with the ground for the load if voltage is being measured
- SCL = Connects to SCL (I2C) on MCU
- SDA = Connects to SDA (I2C) on MCU
- VIN- = Alternate connection point for Vin- rather than using screw terminal
- VIN+ = Alternate connection point for Vin+ rather than using screw terminal
1×2 Screw Terminal Block
- VIN- = Connects to the positive terminal of the load.
- VIN+ = Connects to the positive terminal of the power supply for the load
Note: If the current measurement is negative, these VIN connections have been reversed.
Applications:
- Battery monitoring systems.
- Power consumption measurement.
- Solar power monitoring.
- DC power supply monitoring.
- Arduino projects.
- Raspberry Pi projects.
- ESP8266 and ESP32 applications.
- IoT energy monitoring.
- Robotics.
- Electric vehicle prototypes.
- Embedded system diagnostics.
- Portable electronic devices.
Package Includes:
- INA219 DC Current Measurement Sensor Module.
- 6-pin Male Header.
- 2-pin Screw Terminal Block.