36-V, Bi-Directional, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/ Alert - INA226


36-V, Bi-Directional, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/ Alert



The INA226 is a current shunt and power monitor with an I2C™- or SMBUS-compatible interface. The device monitors both a shunt voltage drop and bus supply voltage. Programmable calibration value, conversion times, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts.

The INA226 senses current on common-mode bus voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device operates from a single 2.7-V to 5.5-V supply, drawing a typical of 330 µA of supply current. The device is specified over the operating temperature range between –40°C and 125\xC2°C and features up to 16 programmable addresses on the I2C-compatible interface.


  • Senses Bus Voltages From 0 V to 36 V
  • High-Side or Low-Side Sensing
  • Reports Current, Voltage, and Power
  • High Accuracy:
    • 0.1% Gain Error (Max)
    • 10 µV Offset (Max)
  • Configurable Averaging Options
  • 16 Programmable Addresses
  • Operates from 2.7-V to 5.5-V Power Supply
  • 10-Pin, DGS (VSSOP) Package

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Parametrics Compare all products in Current Sense Power / Current Monitors

Common Mode Voltage (Max) (V)
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/C)
Gain (V/V)
Gain Error (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Digital Interface
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Common Mode Voltage (Min) (V)
Gain Error Drift (Max) (ppm/°C)
PSRR (Typ) (uV/V)
Specified Common Mode Voltage (V)
Specified Power Supply Voltage (V)
INA226 INA233
36    36   
10    10   
0.02    0.02   
1    1   
0.1    0.1   
126    126   
3.5    3.5   
5.5    5.5   
2.7    2.7   
0.42    0.4   
Alert Function
Low-side Capable   
Alert Function
Integrated Power Monitor
Low-side Capable
I2C    I2C
Catalog    Catalog   
-40 to 125    -40 to 125   
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)    10VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
0    0   
50    25   
2.5    1   
12    12   
3.3    3.3   

Other qualified versions of INA226

Version Part Number Definition
Automotive INA226-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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INA226 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A ≤ 100 
2.7 ≤ 
V ≤ 5.5
0 ≤ 
V ≤ 36
-40 ≤ 
C ≤ 125