INA3221 Three-Channel I2C/SMBus Voltage and Current Sensor

Ideal for monitoring the power consumption of batteries, supply rails, solar panels or power supplies in multi-channel systems. Unlike simpler modules such as INA219, this chip supports simultaneous voltage and current measurements on up to three independent channels.

🔧 Features:

• Chip: INA3221

• Number of channels: 3 independent measurement channels (CH1, CH2, CH3)

• Communication: I2C / SMBus

• Shunt resistors: 0.1 Ω (R100) – for current measurement

• Supply voltage: 3.3 V or 5 V

• Resolution: High-precision differential measurement

• Status outputs: PV (Power Valid), CRI (Critical), WAR (Warning), TC (Timing Control)

• VPU pin: Powers pull-up resistors from a separate supply (according to the I2C logic level)

• Pins: SDA, SCL, GND, AO, VS and others

⚡ Electrical limits:

• Maximum VIN+ voltage (relative to GND): 0 V to 26 V DC

• Maximum VIN+ − VIN− difference (shunt): ±163.84 mV

• Note: VIN+ must be higher than VIN−.
  Do not exceed 26 V on the input pins, or the chip may be damaged.

📦 Applications:

• Monitoring power supply and consumption in embedded and IoT projects

• Monitoring batteries, solar panels, power banks and power supplies

• Industrial systems, robotics and smart home applications

Example code for this module will be added soon. 💻