5PCS INA219 I2C Bidirectional Current Voltage Power Monitor Sensor Module Zero Drift DIY

CJMCU‑219 INA219 I2C Zero‑Drift Bi‑Directional Current / Power Monitoring Sensor Module

The CJMCU‑219 is a zero‑drift, bi‑directional current and power monitoring IC with an I2C interface, part of TI’s energy‑efficient product lineup. The INA219 offers industry‑leading accuracy in a tiny form factor, capable of measuring voltage drop across a shunt resistor, sensing shunt supply voltage, and calculating power consumption. Housed in a SOT23 package, it provides a compact, cost‑effective solution for digital current sensing in servers, laptops, power supplies, battery management systems, automotive, and telecom equipment.

Key features of the INA219 include:

• High Accuracy: Max error of 1% over ‑40°C to +85°C, with offset as low as 100 µV

• 12‑Bit Resolution: Enables precise measurements and allows smaller shunt resistors to reduce power loss and save board space

• Wide Bus Voltage Range: 0V to +26V

• Programmable Calibration: Directly read current in Amps and power in Watts

• Averaging Filter: Average up to 128 samples for noise reduction

• I2C Interface: With timeout to prevent bus lock and support for high‑speed mode up to 3.4 MHz

• Fully Software Programmable

• Single Power Supply: Operates from +3.0V to +5.5V