INA3221 Power Supply Voltage Monitor Board

Triple-Channel Independent High-Side Monitoring: Features three independent channels to concurrently monitor bus voltages and shunt voltage drops across three separate DC power rails.

Precision I2C / SMBus Digital Telemetry: Communicates voltage and current telemetry directly over a standard I²C or SMBus interface with configurable slave addresses.

Wide Voltage Sensing Range: Measures bus voltages from 0V to +26V DC on each channel, making it ideal for multi-rail power distribution systems.

Programmable Warning and Alert Outputs: Outfitted with dedicated critical alert and warning output pins to trigger host interrupts or protective shutdowns upon overvoltage or overcurrent events.

Onboard Precision Shunt Resistors: Equipped with low-resistance 0.1Ω (100mΩ 1% shunt resistors for accurate current calculation across all three channels.

Housing & Board Material: High-grade FR-4 glass-epoxy PCB with surface-mounted INA3221 IC, precision shunt resistors, terminal blocks, and gold/tin-plated pin headers.

Technical Specifications:

Operating Voltage: 2.7V - 5.5V DC (Logic/VCC).

Target Bus Voltage Range: 0V - +26V DC per channel.

Shunt Resistor Value: 0.1 Ω (100 mΩ).

Communication Interface: I²C / SMBus (SCL, SDA).

Color: Purple PCB with Black Terminal Blocks and Gold/Silver Leads.

Usage Advice: Connect VCC (3.3V-5V), GND, SCL, and SDA to your microcontroller; wire your power sources and load lines through the corresponding terminal blocks (CH1, CH2, CH3).

Maintenance: Keep terminal block screws properly tightened; keep the circuit board free from dust, static charges, and liquids.

Essential Multi-Rail Power Diagnostic Board: Position as a top-grade triple-channel power monitoring module for solar power arrays, multi-voltage battery banks, server power distribution, and robotics power logging.

Highlight 3-in-1 Triple Channel Telemetry: Emphasize how a single INA3221 board replaces three separate voltage/current sensor breakout boards, saving space, wiring, and microcontroller GPIO pins.

Recommended Cross-Sell Add-ons: Pair with AC Single Phase Voltage Transformer Sensor, TXS0108E Bi-directional Voltage Module, Voltage Sensor Module, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Voltage Sensor collection page as your multi-channel digital power and voltage monitoring solution.