INA219AIDR Bi-Directional DC Current Power Supply IC SOIC-8

INA219AIDR Bi-Directional DC Current Power Supply IC (SOIC-8) delivers accurate current, voltage, and power measurements in both directions for energy monitoring applications. Designers integrate it into power supply systems, battery management units, and embedded projects to achieve precise power tracking with minimal external components.

Key Features:

• Bi-Directional Sensing: Measures current flow in both charging and discharging directions.
• High-Side Measurement: Monitors current without disturbing the ground path.
• I²C Interface: Communicates power data digitally with microcontrollers and processors.
• 16-Bit ADC: Ensures high-resolution voltage, current, and power readings.
• Low Offset: Offers precise measurements even at low currents.
• Integrated Calibration: Enables easy scaling to match shunt resistor values.

Technical Specifications:

• Operating Voltage (V_CC): 3.0 V to 5.5 V
• Bus Voltage Range: 0 V to 26 V
• Current Measurement Range: ±3.2 A with default shunt value (expandable with different shunts)
• Resolution: 0.8 mA per bit (default configuration)
• Interface: I²C, up to 3.4 MHz
• ADC Resolution: 16-bit
• Operating Temperature: –40 °C to +125 °C

Mechanical Specifications:

• Package Type: SOIC-8 (Surface-Mount)
• Lead Finish: Matte tin-plated for reliable soldering
• Mounting: Surface-mount technology (SMT)
• Body Material: Molded epoxy resin

Dimensions:

• Package Width: ~3.9 mm
• Package Length: ~4.9 mm
• Lead Pitch: 1.27 mm

Pinout and Wiring:

• Pin 1: A0 – I²C address select
• Pin 2: A1 – I²C address select
• Pin 3: SDA – Data line for I²C
• Pin 4: SCL – Clock line for I²C
• Pin 5: VS – Positive supply voltage input
• Pin 6: GND – Ground
• Pin 7: IN– – Negative side of shunt resistor
• Pin 8: IN+ – Positive side of shunt resistor
• Connect the shunt resistor between IN+ and IN–, supply VS with 3.0–5.5 V, and connect SDA/SCL to the controller’s I²C bus.

Datasheet Reference:

• Refer to the official Texas Instruments INA219AIDR datasheet for complete electrical characteristics, calibration details, and example circuits.

Applications:

• Battery Management Systems: Track charging and discharging currents with precision.
• Solar Power Monitoring: Measure bidirectional power in PV systems.
• Embedded Power Logging: Integrate into microcontroller-based data acquisition systems.
• Server and Network Equipment: Monitor supply currents for diagnostics and efficiency optimization.

Equivalent Models:

• INA226: Higher-resolution and expanded features
• INA3221: Multi-channel current and voltage monitor
• INA210: Single-channel high-accuracy current shunt monitor

Package Includes:

• 1 x INA219AIDR Bi-Directional DC Current Power Supply IC (SOIC-8)