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INA226AIDGSR

IC CURRENT MONITOR 0.02% 10VSSOP

Part Number: INA226AIDGSR

Manufacturer: Texas Instruments

Category: Current Regulation/Management

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: INA226AIDGSR.pdf

Description: IC CURRENT MONITOR 0.02% 10VSSOP

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

INA226AIDGSR 36V, 16-Bit, Ultra-Precise I²C Output Current, Voltage, and Power Monitor

A comprehensive technical overview of the INA226AIDGSR, a 16-bit, ultra-precise current shunt and power monitor with I²C interface from Texas Instruments. Covers device function, core features, electrical specifications, 10-pin VSSOP package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 10-Pin VSSOP (DGS) 2.7V to 5.5V Supply

Device Classification 16-Bit Digital Current Shunt and Power Monitor

Part Number: INA226AIDGSR

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +125°C

PRODUCT OVERVIEW

What Is the INA226AIDGSR?

INA226AIDGSR is a 16-bit, ultra-precise current shunt and power monitor with an I²C™- or SMBUS-compatible interface from Texas Instruments. The device monitors both a shunt voltage drop and bus supply voltage, enabling direct readouts of current in amperes and power in watts.[reference:0]

The INA226AIDGSR senses current on common-mode bus voltages that can vary from 0V to 36V, independent of the supply voltage. Programmable calibration value, conversion times, and averaging, combined with an internal multiplier, enable high-accuracy power monitoring across a wide range of applications.[reference:1]

The device operates from a single 2.7V to 5.5V supply, drawing a typical 330µA of supply current. With up to 16 programmable addresses on the I²C-compatible interface and a wide operating temperature range of –40°C to 125°C, the INA226AIDGSR is ideal for rack servers, wireless infrastructure, power management, and battery cell monitoring applications.[reference:2][reference:3]

Ultra-Precise Monitoring 16-bit resolution with 0.1% max gain error and 10µV max offset for high-accuracy current and power measurements.

Wide Common-Mode Range Senses bus voltages from 0V to 36V, independent of supply voltage, supporting high-side or low-side sensing.

I²C Interface 16 programmable addresses with SMBus compatibility for flexible system integration.

DEVICE HIGHLIGHTS

Key Features and Benefits of INA226AIDGSR

Ultra-Precise Current and Power Monitoring

16-bit ADC with 0.1% max gain error and 10µV max offset provides high-accuracy current, voltage, and power measurements for demanding applications.[reference:4]

Wide 0V to 36V Common-Mode Range

Senses bus voltages from 0V to 36V, independent of supply voltage, enabling high-side or low-side sensing in a variety of system configurations.[reference:5]

Configurable Averaging and Conversion Times

Programmable averaging options and conversion times allow optimization of noise performance and conversion speed for specific application requirements.[reference:6][reference:7]

Low Power Consumption

330µA typical supply current with power-down mode reducing consumption to 0.5µA, ideal for power-sensitive and battery-powered applications.[reference:8][reference:9]

16 Programmable I²C Addresses

Up to 16 programmable addresses on the I²C-compatible interface allow multiple devices on the same bus, simplifying system design.[reference:10][reference:11]

Compact 10-Pin VSSOP Package

Available in a space-saving 10-pin VSSOP (DGS) package with a 3.00mm × 4.90mm footprint, ideal for space-constrained designs.[reference:12][reference:13]

REFERENCE DATA

Technical Specifications for INA226AIDGSR

Part Number	INA226AIDGSR	Manufacturer	Texas Instruments
Device Type	16-Bit Current Shunt and Power Monitor	Resolution	16 Bits
Common-Mode Voltage Range	0V to 36V	Supply Voltage (VS)	2.7V to 5.5V
Shunt Voltage Input Range	±81.92 mV	Bus Voltage Input Range	0V to 36V
Gain Error	0.1% Max	Offset Voltage (Shunt)	10µV Max
Offset Voltage (Bus)	7.5mV Max	CMRR	140dB Typ
LSB Step Size (Shunt)	2.5µV	LSB Step Size (Bus)	1.25mV
Input Bias Current	0.1nA Typ	VBUS Input Impedance	830kΩ
Quiescent Current	330µA Typ, 420µA Max	Power-Down Current	0.5µA Typ, 2µA Max
I²C Addresses	16 Programmable	SMBus Timeout	28ms
Package	10-Pin VSSOP (DGS)	Package Body Size	3.00mm × 4.90mm
Mounting Type	Surface Mount	Operating Temperature	-40°C to +125°C
Junction Temperature (Max)	150°C	Storage Temperature	-65°C to +150°C
Thermal Resistance θJA	144.6°C/W	ESD (HBM)	±2500V
ESD (CDM)	±1000V	MSL Rating	Level-2-260C-1 YEAR
Packaging	Tape & Reel (2,500 per Reel)	RoHS	Compliant

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for INA226AIDGSR

Configuration & Interface

The INA226AIDGSR is configured via an I²C-compatible serial interface:

Address Selection: 16 programmable addresses via A0 and A1 pins (connect to GND, SCL, SDA, or VS)[reference:14]
Programmable Calibration: Calibration value, conversion times, and averaging settings programmable via registers[reference:15]
Alert Function: Multi-functional open-drain alert output for overcurrent, overvoltage, or undervoltage detection[reference:16]
Power-Down Mode: Reduces quiescent current to 0.5µA typical for power-sensitive applications[reference:17]

PCB and Power-Supply Guidance

Current monitor performance depends on layout, bypassing, and power supply design:

Shunt Resistor Placement: Place shunt resistor close to IN+ and IN– inputs to minimize parasitic series resistance and inductance[reference:18]
Kelvin Connection: Route IN+ and IN– traces as a differential pair directly to the shunt resistor pads for accurate sensing
Bypass Capacitor: Place a 0.1µF ceramic bypass capacitor close to the VS pin (pin 6)[reference:19]
Ground Plane: Use a solid ground plane for optimal noise performance and thermal management
Thermal Management: θJA = 144.6°C/W for the VSSOP package[reference:20]
Verify the recommended PCB footprint from the official datasheet before production

10-PIN VSSOP (DGS)

Pin Configuration Reference for INA226AIDGSR

INA226

VSSOP (DGS) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The DGS package has 10 pins with 0.5mm pitch.[reference:21][reference:22]

1 A1 Address Pin - Connect to GND, SCL, SDA, or VS to set I²C address[reference:23]

2 A0 Address Pin - Connect to GND, SCL, SDA, or VS to set I²C address[reference:24]

3 ALERT Multi-Functional Alert - Open-Drain Output[reference:25]

4 SDA Serial Data Line - Open-Drain Input/Output[reference:26]

5 SCL Serial Clock Line - Open-Drain Input[reference:27]

6 VS Power Supply - 2.7V to 5.5V[reference:28]

7 GND Ground[reference:29]

8 VBUS Bus Voltage Input[reference:30]

9 IN– Inverting Input - Connect to Load Side of Shunt Resistor[reference:31]

10 IN+ Non-Inverting Input - Connect to Supply Side of Shunt Resistor[reference:32]

APPLICATION AREAS

Typical Applications for INA226AIDGSR

Rack Servers

Power monitoring and management in server infrastructure for optimal energy efficiency.[reference:33]

Wireless Infrastructure

Current and power monitoring in base stations and wireless communication equipment.[reference:34]

High Performance Computing

Precision power measurement for HPC and data center applications.[reference:35]

Battery Cell Monitors and Balancers

Current and voltage monitoring for battery management systems.[reference:36]

Power Supplies

Output current and power monitoring in AC-DC and DC-DC power supplies.[reference:37]

Test Equipment

Precision current and power measurement in laboratory and production test equipment.[reference:38]

REPLACEMENT GUIDANCE

Selecting an Alternative for INA226AIDGSR

A replacement for the INA226AIDGSR should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Common-mode voltage range (0V–36V)

Resolution (16-bit)

Supply voltage range (2.7V–5.5V)

Gain error (0.1% max)

Offset voltage (10µV max shunt)

Package (10-pin VSSOP, DGS)

Operating temperature (–40°C to 125°C)

I²C interface with 16 addresses

Family alternatives: INA226AIDGST (same, small tape and reel, 250 units), INA226AIDGSR (large tape and reel, 2500 units), INA226A (industrial grade), INA226N (standard grade). For lower cost or different resolution, consider INA219 (12-bit) or INA220 (12-bit with alert). For higher precision, consider the INA228 (20-bit) or INA229 (20-bit with SPI). Select based on resolution, package, and packaging needs.

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MANUFACTURER INFORMATION

Texas Instruments

The INA226 (INA226AIDGSR) belongs to the digital current shunt and power monitor portfolio of Texas Instruments. The family is designed for ultra-precise current, voltage, and power monitoring with I²C interface, making it ideal for server infrastructure, wireless communications, power management, and battery monitoring applications.[reference:39]

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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INA226AIDGSR Technical Information

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Specifications

Product Attribute: Attribute Value

Part Number: INA226AIDGSR

Manufacturer: Texas Instruments

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Series: -

Package/Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Current Monitor

Sensing Method: High/Low-Side

Accuracy: ±0.02%

Voltage - Input: 0V ~ 36V

Current - Output: 10mA

Operating Temperature: -40°C ~ 125°C

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 10-VSSOP

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INA226AIDGSR Procurement and Technical Support

INA226AIDGSR is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: INA226AIDGSR

Manufacturer: Texas Instruments

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Category: Current Regulation/Management

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