MCU-3221 INA3221 Three Way I2C Output Current Power Monitor

MCU-3221 INA3221 Three Way I2C Output Current Power Monitor is a high-precision sensor module used to simultaneously monitor voltage and current across three channels via I2C interface. Based on the Texas Instruments INA3221 chip, it’s ideal for battery-powered systems, power management circuits, and embedded energy monitoring applications.

Key Features:

• Triple Channel Monitoring: Measures voltage and current on three independent power rails.
• I2C Interface: Communicates easily with microcontrollers using standard I2C protocol.
• High Accuracy: 26-bit delta-sigma ADC for precise current and voltage measurements.
• Programmable Alert Limits: Built-in limit registers for overvoltage, undervoltage, and overcurrent events.
• Low Power Consumption: Suitable for battery and low-power applications.

Technical Specifications:

• Chipset: Texas Instruments INA3221
• Input Voltage Range: 0V to 26V per channel
• Shunt Voltage Range: ±163.84mV
• Resolution: 26-bit ADC
• Interface: I2C (Address configurable)
• Alert Function: Programmable alert pin
• Operating Voltage: 3.3V to 5V

Mechanical Specifications:

• PCB Size: Approx. 36mm × 21mm
• Mounting Holes: 2 x M2 holes for PCB mounting
• Header Type: 2.54mm pitch male header
• Pin Labels: Clearly marked for VIN+, VIN−, GND, SDA, SCL, and ALERT

Pinout and Wiring:

• SCL: I2C clock line
• SDA: I2C data line
• GND: Ground connection
• VIN1–3: Voltage input and shunt measurement channels
• ALERT: Optional alert pin for fault/warning indication

Datasheet and Documentation:

• Download INA3221 Datasheet (PDF)

Applications:

• Battery Monitoring: Measures battery voltage, current, and power usage in real time.
• Power Supply Diagnostics: Monitors different voltage rails in embedded systems.
• IoT Devices: Helps track power usage in smart sensors and edge devices.
• Industrial Automation: Used for monitoring motors, drivers, and controllers.
• DIY Electronics: Compatible with Arduino, ESP32, and Raspberry Pi.

Equivalent Models:

• INA219: Single-channel version for simple current monitoring
• INA260: Digital current/power monitor with integrated shunt
• ACS712: Analog current sensor for basic current sensing applications

Package Includes:

• 1 x MCU-3221 INA3221 Three Way I2C Output Current Power Monitor Module
• 1 x Male Header (Unsoldered)