INA226AIDGSR - 16-Bit I2C Current/Power Monitor | TI
MPN: INA226AIDGSR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.55 | $255.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $1.95 | $1,950.00 |
| 3,000 | $1.78 | $5,340.00 |
Drop-in alternatives for INA226AIDGSR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
INA226AQDGSRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
INA230AIDGSR
✅ Drop-In📋 Reference alternative (not in catalog)
INA220AIDGST
⚡ Same Package📋 Reference alternative (not in catalog)
INA219AIDGST
⚡ Same Package📋 Reference alternative (not in catalog)
ADM1191ARMZ-R7
⚡ Same Package📋 Reference alternative (not in catalog)
INA226AIDGSR Maximum Ratings & Electrical Characteristics
| Function | Current shunt and power monitor with I2C/SMBus interface |
| ADC Resolution | 16-bit |
| Maximum Bus Voltage | 36 V |
| Measurement Configuration | High-side or low-side, bidirectional |
| Interface | I2C / SMBus |
| Alert Output | Yes |
| Package | 10-VSSOP (DGS) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +125°C |
| Supply Voltage Range | [DATA_NEEDED: Supply Voltage Range] |
| Supply Current | [DATA_NEEDED: Supply Current] |
| Shunt Voltage Range | [DATA_NEEDED: Shunt Voltage Range] |
| Common-Mode Voltage Range | [DATA_NEEDED: Common-Mode Voltage Range] |
| Measurement Accuracy | [DATA_NEEDED: Measurement Accuracy] |
| Conversion Time / Averaging | [DATA_NEEDED: Conversion Time and Averaging] |
| RoHS Status | [DATA_NEEDED: RoHS Status] |
INA226AIDGSR Pin Configuration
| Pin 1 | VS — Power supply input |
| Pin 2 | GND — Ground |
| Pin 3 | SCL — I2C serial clock |
| Pin 4 | SDA — I2C serial data |
| Pin 5 | A0 — Address select pin 0 |
| Pin 6 | A1 — Address select pin 1 |
| Pin 7 | ALERT — Alert/interrupt output |
| Pin 8 | IN- — Negative shunt voltage sense input |
| Pin 9 | IN+ — Positive shunt voltage sense input |
| Pin 10 | VIN — Bus voltage sense input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
INA226AIDGSR is suitable for 6 applications: Server and Datacenter Power Monitoring, Battery Management for Portable Equipment, Industrial Automation and Control, Telecom and Networking Equipment, Solar and Renewable Energy Power Conversion, Test and Measurement Instrumentation.
Server and Datacenter Power Monitoring
The INA226AIDGSR is widely used in server and datacenter power monitoring to measure 12 V or 24 V rails with 36 V bus capability and 16-bit resolution. Placed across a low-value shunt in the power distribution path, it reports load current, bus voltage, and per-rail power over I2C to a BMC or host controller. The programmable alert pin can catch overcurrent events before a supply fault. Using the calibrated multiplier, the host obtains direct watt values without additional analog circuits.
Recommended
Battery Management for Portable Equipment
Bidirectional current sensing makes INA226AIDGSR ideal for battery charge/discharge monitoring in portable devices and UPS systems. It measures current in both directions, reports positive or negative readings over I2C, and can trigger an alert when charge or discharge current exceeds a limit. The 16-bit resolution preserves coulomb-counting accuracy at low currents. It works with a battery charger or solar charger controller to form a complete battery-management front end.
Recommended
Industrial Automation and Control
In industrial automation, INA226AIDGSR monitors motors, actuators, solenoid valves, and PLC power rails. The 36 V common-mode voltage covers 24 V industrial buses commonly used in factories. The device performs high-side measurement without ground disturbance and reports current/power to a PLC or industrial MCU over I2C. Its -40°C to +125°C rating suits cabinet environments near motor drives. An alert output can signal overload conditions to a safety controller.
Recommended
Telecom and Networking Equipment
Telecom line cards and networking switches require accurate per-rail power telemetry for thermal management and capacity planning. The INA226AIDGSR reports 36 V bus voltage and bidirectional current with 16-bit precision over I2C/SMBus, enabling a baseboard management controller to read power consumption without a separate ADC. Its alert pin can be programmed as a power-limit interrupt. The small 10-VSSOP footprint allows distributed monitoring near each power island.
Recommended
Solar and Renewable Energy Power Conversion
Solar battery charge controllers, microinverters, and MPPT stages monitor both incoming panel current and battery current. The INA226AIDGSR's 36 V range and bidirectional sensing handle charge/discharge in 12 V and 24 V solar systems. The I2C output connects directly to an MCU running MPPT or charge algorithms, while the alert pin can flag reverse current or overload. 16-bit resolution helps extract small current changes during low irradiance.
Recommended
Test and Measurement Instrumentation
In automated test equipment and lab instruments, the INA226AIDGSR provides precise DUT current and power measurement without a separate DAQ card. The monitor measures a floating shunt voltage and bus voltage, then outputs calibrated digital values over I2C. This reduces noise pickup compared to long analog signal traces. The programmable conversion time and averaging allow users to trade speed for noise. The 10-VSSOP package fits on small probe and measurement boards.
Recommended
Recommended Products Summary
Engineering reference data for INA226AIDGSR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA226AQDGSRQ1 | INA230AIDGSR | INA220AIDGST |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-VSSOP (DGS) | 10-VSSOP (DGS) - same | 10-VSSOP (DGS) - same | 10-MSOP/VSSOP - same footprint family |
| ADC Resolution | 16-bit | 16-bit | 16-bit | 12-bit |
| Maximum Bus Voltage | 36 V | 36 V | 36 V | 26 V |
| Interface | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus |
| Alert Output | Yes | Yes | Yes | Yes |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Key Differentiators
- 16-bit ADC and 36 V bus range provide higher precision and wider operating headroom (vs INA220AIDGST)
- True bidirectional high-side/low-side measurement with alert on both current and power (vs INA219AIDGST)
- Simpler register map and calibration model than INA230 (vs INA230AIDGSR)
Design Notes
Use Kelvin-connected traces from the shunt resistor to the IN+ and IN- pins. Route these sense traces as a differential pair and keep them away from switching nodes. A 4-wire shunt connection eliminates solder-junction and trace resistance errors, preserving the 16-bit measurement accuracy. Place the shunt physically close to the INA226 and avoid routing high-current paths directly under the sense pins.
Bypass the VS pin with a 0.1 uF ceramic capacitor close to the device and add a 1 uF bulk capacitor if the supply line is long. The I2C bus needs pull-up resistors, typically 2.2 kOhm to 10 kOhm depending on bus capacitance and speed. If the host MCU operates at a different logic level than VS, use an I2C level shifter on SCL and SDA.
Program the calibration register and choose the correct shunt value before reading current or power. The alert pin is latching and must be cleared by reading the interrupt flag; failing to do so causes repeated false alarms. Also verify the A0/A1 address pins are not left floating or conflicting with another I2C device on the bus. For bus voltages above 36 V, use an external divider or a higher-voltage monitor.
Compliance Information
Compliance details were not present in the retrieved web snippets; the automotive-qualified INA226AQDGSRQ1 variant is AEC-Q100-certified, but the commercial INA226AIDGSR compliance should be confirmed from the TI datasheet or product page.
