Texas Instruments INA226AIDGSR

INA226AIDGSR Current Monitor Regulator High/Low-Side 10mA 10-VSSOP

The INA226AIDGSR from Texas Instruments is a high-precision digital current shunt and power monitor with an I²C-compatible interface, designed for accurate current, voltage, and power measurement in a wide range of electronic systems. This sophisticated integrated circuit combines a precision analog front-end with a digital processing core in a compact 10-pin VSSOP package, capable of monitoring current across a shunt resistor with a maximum voltage drop of 81.92 mV while simultaneously measuring bus voltages up to 36 V. The device features programmable calibration values, conversion times, and averaging modes, allowing it to achieve current measurement accuracy of ±0.1% with a maximum offset drift of 0.5 μV/°C, making it ideal for power management, battery charging, and system monitoring applications in computing, telecommunications, and industrial equipment where precise energy monitoring is critical for performance optimization and fault detection.

INA226AIDGSR Key Features

This power monitor incorporates a 16-bit delta-sigma ADC that provides high-resolution measurements with programmable conversion times ranging from 140 μs to 8.244 ms, balancing speed and accuracy according to application requirements. The INA226AIDGSR calculates power results internally using the formula P = I × V, eliminating the need for external computation and providing direct power readings up to 2.1 kW with 2.5 mW resolution. Key specifications include a wide common-mode voltage range from 0 V to 36 V, independent of the 2.7 V to 5.5 V supply voltage, and 16 programmable addresses supporting multiple devices on the same I²C bus. The device features alert functionality with programmable thresholds for overcurrent, undercurrent, and power overload conditions, along with a dedicated alert pin for immediate system response. Operating over the industrial temperature range (-40°C to +125°C) with typical current consumption of 330 μA, this monitor ensures reliable performance in demanding environments while minimizing power overhead.

Alternative Digital Power Monitor Recommendations

● MAX44299 (Analog Devices): A high-side current sense amplifier with I²C interface and integrated 12-bit ADC for precision current monitoring applications.

● LTC2947 (Analog Devices): A high-precision power and energy monitor with 24-bit ADC and SPI interface for high-resolution measurement requirements.

● INA228 (Texas Instruments): A 20-bit precision digital power monitor with wider measurement range and enhanced accuracy for demanding applications.

● PAC1934 (Microchip Technology): A quad-channel DC power/energy monitor with 16-bit resolution and automatic accumulation of energy data.