EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    INA226AIDGSR
INA226AIDGSR

TIINA226AIDGSR

Texas Instruments
Higher-resolution digital power monitor with integrated current and voltage measurement options
NRND3,863 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The INA226AIDGSR is a digital power monitor IC from Texas Instruments that measures shunt (current) voltage and bus voltage and reports calculated measurements over an I2C interface. It combines on-chip measurement, programmable averaging and conversion timing, and I2C registers for current, voltage, and power monitoring. The device is intended for system-level power monitoring where higher-resolution digital measurement and I2C connectivity are required.

Why Choose This Part

The INA226 integrates shunt and bus voltage measurement with digital registers and I2C access, reducing the need for external ADCs and complex analog signal routing. Programmable averaging and conversion options make it flexible for trading off bandwidth and noise for different applications. Its digital interface and on-chip calculations simplify system firmware and reduce software math overhead.

Applications

Board- and system-level power monitoring
Continuous measurement of supply voltage, load current and power for system health and efficiency telemetry.
Battery-powered devices and power budget tracking
Track charge/discharge current and average power to estimate runtime and enable power-saving strategies.
Point-of-load and power-rail monitoring
Monitor individual regulators or power rails in multi-rail systems to detect faults or verify regulator performance.
Power profiling during development and validation
Capture average and instantaneous current/power for firmware and hardware optimization.
Embedded system telemetry over I2C
Provide digital power data to microcontrollers or system management controllers for logging and control.

Key Specifications

Accuracy +/-0.02%
Function Current Monitor
Mounting Type Surface Mount
Package / Case 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Sensing Method High/Low-Side
Voltage - Input 0V ~ 36V
Current - Output 10mA
Operating Temperature -40degC ~ 125degC
Supplier Device Package 10-VSSOP

Getting Started

Get started by reading the datasheet and reference designs from Texas Instruments, and use an I2C-capable microcontroller or single-board computer (Arduino, STM32, Raspberry Pi) as the master. For hardware prototyping, use a breakout or evaluation module with a convenient shunt resistor and headers, wire the shunt in series with the measured load, and confirm I2C addressing and pull-ups. Use a logic analyzer or I2C scanner to verify device presence and read the registers while experimenting with averaging and conversion-time settings.

Also Consider

INA219AIDR TITexas Instruments - Lower-cost digital current/power monitor with I2C interface suitable for simpler or lower-resolution power measurement tasks.
INA230AIDGSR TITexas Instruments - High-side current/power monitor with flexible measurement options for precision rail monitoring in complex power-management designs.
The 2026 Embedded Online Conference