Description
The CJMCU-3221 INA3221 is a three-channel, high-side current and bus voltage monitor that communicates via an I²C interface. Designed for precision power monitoring, this module measures both shunt voltage drops and bus supply voltages, supporting systems operating from 0V to 26V. It features programmable averaging, conversion times, and alert thresholds, enabling highly flexible integration into advanced power management systems.
With its high accuracy, low offset voltage, and wide operating temperature range, the INA3221 is ideal for applications such as battery monitoring, telecom equipment, and power supply management.
Key Features
- Three-Channel Current and Voltage Monitoring: Simultaneously measures three power sources or loads.
- Wide Bus Voltage Range: Monitors voltages from 0V to 26V.
- High Accuracy:
- Offset Voltage: ±80 µV (max)
- Gain Error: 0.25% (max)
- Programmable Averaging and Conversion: Customizable for performance or power efficiency.
- Alert and Warning Outputs: Detects programmable out-of-range conditions.
- I²C Communication Interface: Simple integration with microcontrollers like Arduino, ESP32, and Raspberry Pi.
- Four Configurable I²C Addresses: Supports multiple devices on the same bus.
- Low Power Consumption: Typical supply current of 350 μA.
- Wide Operating Temperature Range: –40°C to +125°C.
Specification
- Model: CJMCU-3221 INA3221
- Bus Voltage Range: 0V to 26V
- Operating Voltage: 2.7V to 5.5V
- Current Consumption: 350 µA (typical)
- Offset Voltage: ±80 µV (max)
- Gain Error: 0.25% (max)
- Interface: I²C (supports 4 programmable addresses)
- Temperature Range: –40°C to +125°C
- Weight: 10 g
Application
- Power Management Systems: Real-time monitoring of multiple voltage rails.
- Telecommunication Equipment: Power tracking and fault detection in base stations and routers.
- Battery Chargers and Packs: Monitoring charge and discharge currents.
- Power Supplies: Voltage and current sensing for safety and diagnostics.
- Test and Measurement Equipment: Accurate multi-channel current/voltage measurement in lab instruments.