Description

The INA219 is an I²C-compatible, zero-drift, bi-directional current and power monitoring integrated circuit designed by Texas Instruments.

Key Specifications & Features

• Bus Voltage Range: 0V to +26V.

• Supply Voltage: +3V to +5.5V (consumes under 1mA).

• Current Sensing Range: Up to ±3.2A standard (with a 0.1Ω, 1% sense resistor

• Resolution: 12-bit ADC (providing 0.8mA resolution at ±3.2A, or down to 0.1mA resolution at lower gain settings)

• Communication Interface: I²C / SMBus (up to 16 programmable addresses)

• High-Side Sensing: Measures current on the high side without shifting the circuit's ground reference

• Grades: Available in Grade A (±1% max error) and Grade B (±0.5% max error)

Common Use Cases

• Battery Monitoring: Tracking charge and discharge cycles in mobile or off-grid systems.

• Solar Panels: Monitoring output voltage, current, and wattage from solar arrays.

• Robotics & IoT: Measuring real-time power draw of microcontrollers, motors, and embedded modules.