INA219 Power & Current Sensor

About this item

🔌 INA219 High-Side Current Sensor Module

🔍 Precision Voltage, Current, and Power Monitoring

The INA219 is a high-side current, voltage, and power monitoring sensor that enables accurate measurement of current flow, bus voltage, and power consumption. Designed by Texas Instruments, this module is ideal for battery management, embedded power monitoring, and energy-aware applications where real-time consumption insights are essential.

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⚡ Why It Stands Out

• ⚙️ High-side sensing allows monitoring without interfering with the ground path
• 📊 16-bit ADC resolution ensures precise measurements
• 🔌 Measures bus voltage, shunt voltage, current, and power
• 📉 Low drift and high accuracy, even at low currents
• 🧩 Easy integration with Arduino, ESP32, Raspberry Pi, etc.

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📐 Accurate Power Monitoring

• 🔋 Shunt Voltage Range: ±320 mV
• ⚡ Bus Voltage Range: 0V–26V
• 🔌 Current Measurement Range: ±3.2A (with 0.1Ω shunt resistor)
• 🔧 Configurable gain and calibration for higher currents
• 🧠 Calculated power (in watts) via internal multiplier

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📦 Compact & Reliable

The INA219 module is compact and ideal for energy-conscious systems, providing accurate real-time power analysis with minimal overhead.

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🧪 Applications

• 🔋 Battery-powered systems and battery fuel gauges
• 🔌 DC power supply monitoring
• 📈 Energy-efficient IoT devices
• 🤖 Robotics and automation systems
• ⚡ Solar power monitoring and load balancing
• 💻 Laptop or embedded system power profiling

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⚠️ Notes

• 🧱 Uses I²C interface (default address: 0x40)
• 🔌 Operating voltage: 3.0–5.5V
• ⚙️ Programmable calibration register
• 🔧 Works with external shunt resistors for custom ranges

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✨ Key Advantages

• 🎯 High accuracy with 16-bit resolution
• ⚡ Full power metering: voltage, current, and power
• 🔍 Internal multiplier for automatic power calculation
• 📏 Tiny form factor for space-sensitive applications
• 🤝 Plug-and-play with common microcontroller platforms

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🔗 Useful Links

• 📄 View Datasheet
• 🔧 Arduino Library (Adafruit)
• 🛠️ TI Product Page