INA219,pdf(Zerø-Drift,

The INA219 is a high-side current shunt and power monitor with an I²C interface. The INA219 monitors both shunt drop and supply voltage, with programmable conversion TImes and filtering. A programmable calibraTIon value, combined with an internal mulTIplier, enables direct readouts in amperes. An addiTIonal multiplying register calculates power in watts. The I²C 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 0V to 26V. The device uses a single +3V to +5.5V supply, drawing a maximum of 1mA of supply current. The INA219 operates from –40°C to +125°C.