This Ina219 I2C Bi-Directional Dc Current Power Supply Sensor Breakout Module designed as a perfect solution for all power-monitoring problems. Using this INA219B chip on this breakout board, we can measure both the high side voltage and DC current draw over I2C with 1% precision.
This Ina219 defined as a control integrated circuit that supports I2C with zero drift and bi-directional current/power monitoring. It is designed as the industry’s highest precision and small size. It not only can monitor the pressure drop on the shunt resistor, sensing shunt power supply voltage, at the same time also can calculate the power.
This Ina219 current sensor manufactured as SOT23 packaging. But for the server, notebook computer, power supply, battery management, and digital electric vehicle and telecommunication equipment measuring flu provides a small low-cost solution.
A precision amplifier is capable of measuring the voltage across the 0.1 ohms, 1% sense resistor. The amplifier’s maximum input difference of  ±320mV indicates that it can measure up to ±3.2 Amps. With the internal 12 bit ADC can measure up to ±3.2A range with 0.8mA resolution. The module provides a maximum current of ±400mA at a resolution of 0.1mA, also with the internal gain set at the minimum of div8.
This Power Supply Sensor can operate at a temperature range of -40 c to + 85 c. And can realize the maximum error of 1% accuracy, with a maximum offset of 100 μV. The high precision feature of the product in combination with 12 resolutions, can help clients as much as possible. Thereby reduce the pressure drop on the shunt resistor. This can further minimize the power loss and power consumption, and minimize PCB board size.
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