The INA3221 is a triple-channel power supply monitor designed to measure shunt voltage and supply voltages in multiple power rails. With I2C and SMBus communication support, this module provides a reliable, high-precision solution for monitoring currents, voltages, and power in systems with multiple power supplies or rails. This module replaces the INA219 sensor with a triple-channel design, making it ideal for more complex monitoring applications.

Features:

• Triple-Channel Monitoring: Capable of monitoring up to three power rails simultaneously.
• I2C and SMBus Interface: Easy communication with microcontrollers and processors via I2C/SMBus protocols.
• High-Precision: Accurate current, voltage, and power measurements with low offset.
• Current Sensing: Measures current through shunt resistors, providing a high-resolution current measurement.
• Power Measurement: Calculates power consumption for each monitored channel.
• Voltage Monitoring: Monitors the supply voltage across each channel.
• Configurable Alerts: Can generate alerts based on threshold values for each monitored rail.
• Pin-Header Design: Easy integration into projects with a pin header interface.

Specifications:

• Microcontroller: INA3221 (Triple-Channel, I2C, SMBus).
• Input Voltage Range: 0V to 26V for each monitored rail.
• Shunt Voltage Measurement: 0 to 40mV, with a resolution of 40µV.
• Voltage Sensing Accuracy: ±0.5% (typical).
• Current Measurement Range: Configurable, with 0 to 20A, depending on the shunt resistor used.
• Power Measurement Range: Up to 5W per channel.
• I2C Address: Configurable via address pins.
• Shunt Resistor: External resistor can be used for different current ranges.
• Measurement Rate: Configurable up to 800 samples per second (default 800 Hz).
• Operating Voltage: 3.0V to 5.5V (for the sensor module).
• Power Consumption: Low power consumption, ideal for battery-powered applications.
• Temperature Range: -40°C to +125°C.
• Operating Current: 200µA typical.
• Pins: Includes pin header for easy wiring and integration into custom boards.

Applications:

• Power monitoring in multi-rail power systems.
• Battery management systems (BMS) for voltage and current monitoring.
• IoT power consumption measurement.
• Remote monitoring of power supplies in industrial applications.
• Robotics and embedded systems with multiple power rails.