Product Overview

The INA219 module is designed to detect variations in voltage across shunts on buses within the range of 0 to 26 V. This breakout serves as a monitoring system for current shunts and power, featuring an interface that is compatible with either I2C or SMBUS. It is capable of monitoring both the voltage drop across the shunt and the voltage supplied to the bus, offering programmable conversion times and filtering options. Through the use of a programmable calibration value and an internal multiplier, it allows for direct measurement of current in amperes. Additionally, a supplementary multiplying register is employed to calculate power in watts. The interface, compatible with I2C or SMBUS, supports 16 programmable addresses.

Utilize this breakout for precise measurements of both high-side voltage and DC current draw over I2C with an accuracy of 1%.

Key Features

Senses Bus Voltages from 0 to 26V
Reports Current, Voltage, and Power
16 Programmable Addresses
High Accuracy: 0.5% (Maximum) Over
Temperature (INA219B)
Filtering Options
Calibration Registers

The INA219 is a highly accurate voltage, current, and power monitor sensor that operates over a wide range of voltages from 0 to 26V DC. It has an I2C communication interface that enables easy integration with microcontrollers and other digital systems. The sensor breakout can measure voltage with an accuracy of 0.4%, current with an accuracy of 1%, and power with an accuracy of 1%. It has a programmable gain amplifier that can be set to one of eight gain values, allowing for precise measurements even at low voltages or currents.

The INA219 also has an integrated shunt resistor that enables it to measure current with very low resistance and minimal power loss. It has a low quiescent current of 1mA, which means it can be left in a low-power standby mode when not in use. The sensor breakout also features an alert pin that can be programmed to trigger an interrupt when a preset threshold is exceeded, making it ideal for monitoring critical systems or equipment.

The I2C interface allows for easy configuration and data retrieval using a variety of programming languages and development platforms. The INA219 also includes a built-in calibration function that compensates for manufacturing variations and ensures accurate readings across a wide range of operating conditions.

The INA219 voltage, current, and power monitor sensor breakout with I2C communication interface provides an excellent solution for measuring and monitoring electrical parameters in a variety of applications. Its high accuracy, low power consumption, and programmable features make it a versatile and reliable choice for developers and engineers.

Resources

Datasheet INA219