INA219AIDCNR

The Texas Instruments INA219AIDCNR is a versatile current shunt and power monitor IC featuring an I2C or SMBus-compatible interface. It is capable of monitoring both shunt voltage drop and bus supply voltage, offering programmable conversion times and filtering options. This device enables direct readouts of current in amperes through a programmable calibration value and an internal multiplier. An additional multiplying register allows for power calculation in watts.

The INA219AIDCNR supports a common-mode voltage range from 0V to 26V and provides a 12-bit resolution for precise measurements. It boasts a high accuracy of ±1% and operates within a temperature range of -40°C to 125°C. The device is supplied in a compact SOT-23-8 package, suitable for surface mounting.

Key electrical specifications include a maximum input offset of 100 µV, a typical input offset drift of 0.1 µV/°C, and a minimum CMRR of 100 dB. The quiescent current is a maximum of 1mA. The device offers multiple voltage gain options and programmable addresses, allowing for flexible system integration.

This current monitor is ideal for applications requiring precise measurement of current, voltage, and power. Its bidirectional sensing capability and integrated power monitoring features make it suitable for battery management, power supply monitoring, and other power-sensitive applications.