INA220BIDGST (TEXAS INSTRUMENTS)

The INA220BIDGST is a bi-directional zero-drift Current Shunt and Power Monitor with an I?C- or SMBUS-compatible interface. The INA220 monitor both shunt drop and supply voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The I?C- or SMBUS-compatible interface features 16 programmable addresses. The separate shunt input on the INA220 allows it to be used in systems with low-side sensing. The B grade version has higher accuracy and higher precision specifications. The INA220 senses across shunts on buses that can vary from 0 to 26V, useful for low-side sensing or CPU power supplies. The device uses a single 3 to 5.5V supply, drawing a maximum of 1mA of supply current.