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Specifications:
- Sensing Voltage Range: 0 V to 26 V
- Power Supply Voltage: 2.7 V to 5.5 V
- Offset Voltage: ±80 µV (max)
- Gain Error: 0.25% (max)
- Configurable Averaging Options: Yes
- Programmable Addresses: Four
- Alert and Warning Outputs: Programmable
- Reporting: Shunt and Bus Voltage
Package:
1x Module
Product Description
Features:
- Triple-Channel Monitoring: Simultaneously monitor three different power supplies or loads.
- High Accuracy: Minimal offset voltage (±80 µV) and low gain error (0.25%) ensure precise current and voltage measurements.
- Wide Voltage Range: Capable of sensing bus voltages from 0 V to 26 V, suitable for a variety of applications.
- Configurable Averaging: Allows for adjustable averaging of measurements to filter noise and improve accuracy.
- Programmable Alerts: Programmable alert and warning outputs for system monitoring and fault detection.
- I2C/SMBus Interface: Standard I2C/SMBus interface for easy integration with microcontrollers and other digital systems.
- Low Power Consumption: Operates on a power supply range of 2.7 V to 5.5 V, making it suitable for low-power applications.
- Four Programmable Addresses: Allows up to four INA3221 devices on the same I2C bus for expanded monitoring capabilities.
The INA3221 is a highly integrated triple-channel current and voltage monitor designed for power management systems. It provides high accuracy measurements of both the shunt (current) and bus (voltage) across three channels, making it ideal for monitoring multiple power rails or batteries simultaneously. The sensor board module supports a wide voltage range of 0 V to 26 V, making it versatile for various applications. The INA3221 features an offset voltage of ±80 µV and a gain error of 0.25%, ensuring precise measurements. Configurable averaging options help filter out noise to provide stable readings, and programmable alert and warning outputs can be used for system monitoring and fault detection. The module operates on a power supply voltage of 2.7 V to 5.5 V, suitable for most low-power and battery-operated devices. The device communicates via an I2C/SMBus interface, allowing easy integration with microcontrollers and digital systems. With four programmable addresses, multiple INA3221 modules can coexist on the same I2C bus, expanding monitoring capabilities.
Applications:
- Power Management Systems: Monitor and manage multiple power rails in computers, servers, and communication equipment.
- Battery Monitoring: Measure voltage and current in battery packs for electric vehicles, drones, and portable devices.
- Industrial Equipment: Track power usage and efficiency in industrial machinery and automation systems.
- Data Centers: Ensure reliable operation by monitoring power distribution units and server power supplies.
- Renewable Energy Systems: Monitor solar panels and wind turbines for optimal performance and maintenance.
Frequently Asked Questions (FAQ):
How do I connect the INA3221 to a microcontroller?
- Connect the VCC and GND pins to the power supply. Connect the SDA and SCL pins to the corresponding I2C pins on the microcontroller. Use the I2C address pins (A0 and A1) to set the module's address.
Can the INA3221 measure negative voltages?
- The INA3221 is designed to measure positive bus voltages up to 26 V. It does not support negative voltage measurement.
How can I configure the averaging options?
- The averaging options can be configured via the I2C interface by setting the appropriate registers. Refer to the datasheet for detailed instructions on register configuration.
What happens if the sensed voltage exceeds 26 V?
- Exceeding the maximum voltage rating of 26 V can damage the INA3221 module. Ensure that the sensed bus voltage stays within the specified range to prevent damage.
Is it possible to use multiple INA3221 modules on the same I2C bus?
- Yes, the INA3221 supports four programmable addresses, allowing up to four modules to be connected on the same I2C bus. Set each module to a unique address using the A0 and A1 pins.
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