Author: Talha Sarı
The INA219 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses.
The INA219 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications.
The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The INA219 operates from –40°C to 125°C. For more check the datasheet: /doc/INA219_Datasheet.pdf
- Senses Bus Voltages from 0 to 26 V
- Reports Current, Voltage, and Power
- 16 Programmable Addresses
- High Accuracy: 0.5% (Maximum) Over Temperature (INA219B)
- Filtering Options
- Calibration Registers
- SOT23-8 and SOIC-8 Packages
| Pin # | Name | Desciption |
|---|---|---|
| 1 | IN+ | Positive differential shunt voltage. Connect to positive side of shunt resistor. |
| 2 | IN- | Negative differential shunt voltage. Connect to negative side of shunt resistor. Bus voltage is measured from this pin to ground. |
| 3 | GND | Connect to GND |
| 4 | Vs | Power supply, 3 to 5.5V |
| 5 | SCL | I2C serial clock |
| 6 | SDA | I2C serial data |
| 7 | A0 | Address pin |
| 8 | A1 | Address pin |
This library is created for STM32 development environment and can be used only with STM32F series microcontrollers for now. Example project will be added soon in this directory: /example
Note: This library requires HAL!
GNU General Public License v3.0