Matek Ultra-Precise I2C Power Monitor, I2C-INA-BM
by Matek Systems

The I2C-INA-BM is an ultra-precise digital power monitor designed for high-performance applications, based on the highly accurate TI INA228 IC. This power monitor features a 200 μΩ typical resistance, ensuring low power loss during operation. The I2C-INA-BM can monitor battery voltage (0-85V) and current (0-204.8A), offering ±0.1% voltage accuracy and ±2% current accuracy for reliable and precise measurements. Ideal for RC planes, drones, or other battery-operated devices, it can support up to 3 I2C-INA-BM devices on a single I2C bus in parallel, making it versatile for multiple sensor setups. With no calibration required, users can seamlessly integrate it into ArduPilot firmware for accurate current and voltage readouts via I2C. The compact and lightweight design (27mm x 20mm x 6mm, 4g) ensures minimal impact on your device's weight, while operating in a wide range of temperatures (-40°C to 125°C).

Specifications:

• IC Used: INA228 85-V, 20-Bit, Ultra-Precise Power Monitor IC
• Battery Voltage Sense Input: 0~85V
• Current Sense Range: 0~204.8A
• Current Sensing Resistor Load: 150A (continuous), 204.8A (burst)
• Voltage Accuracy: ±0.1%
• Current Accuracy: ±2%
• Interface: I2C (Decimalism Address 69 by default, 68 and 65 options)
• Power Supply: 4~9V @5V pad/pin
• Power Consumption: 1mA
• LED Indicator: Red 3.3V indicator
• Operating Temperature Range: -40~125°C
• Board Size: 27mm x 20mm x 6mm
• Weight: 4g

Packing Includes:

• 1x I2C-INA-BM board
• 1x JST-GH-4P to JST-GH-4P 20cm silicon wire