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20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Interface

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INA228AQDGSRQ1 General Description

The INA228-Q1 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA228-Q1 reports current, bus voltage, temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA228-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 μs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.


Key Features

  • AEC-Q100 qualified for automotive applications:
  • Temperature grade 1: –40°C to +125°C, T
  • A
  • Functional Safety-Capable
  • Documentation available to aid functional safety system design
  • High-resolution, 20-bit delta-sigma ADC
  • Current monitoring accuracy:
  • Offset voltage: ±1 μV (maximum)
  • Offset drift: ±0.01 μV/°C (maximum)
  • Gain error: ±0.05% (maximum)
  • Gain error drift: ±20 ppm/°C (maximum)
  • Common mode rejection: 154 dB (minimum)
  • Power monitoring accuracy:
  • 0.5% full scale, –40°C to +125°C (maximum)
  • Energy and charge accuracy:
  • 1.0% full scale (maximum)
  • Fast alert response: 75 μs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable resistor temperature compensation
  • Programmable conversion time and averaging
  • 2.94-MHz high-speed I
  • 2
  • C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply:
  • Operational current: 640 μA (typical)
  • Shutdown current: 5 μA (maximum)


Category Integrated Circuits (ICs)Power Management (PMIC)Power Supply Controllers, Monitors Mfr Texas Instruments
Series Automotive, AEC-Q100 Package Tape & Reel (TR)Cut Tape (CT)Digi-Reel®
Product Status Active Applications Digital Power Monitor
Voltage - Input -0.3V ~ 85V Voltage - Supply 2.7V ~ 5.5V
Current - Supply 640 µA Operating Temperature -40°C ~ 125°C (TA)
Mounting Type Surface Mount Package / Case 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package 10-VSSOP


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

  • DHL

  • Fedex

  • UPS

  • EMS

  • Registered Air Mail


We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

  • Wire Transfer

  • Paypal

  • Credit Card

  • Western Union

  • Money Gram


Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

    Tape and Reel

  • Cut Tape

    Cut Tape

  • Tube or Tray

    Tube or Tray

Ratings and Reviews

H**e Dec 03, 2020

Thank you to the seller!

E**n Sep 01, 2020

Received in excellent condition, packed well. Corresponds to the description. Thank you very much to the seller! Five stars. I recommend. Order received directly in excellent condition, packed well. Fits the description. Thank you very much to the seller! Five stars. Recommend.

M**r Jul 02, 2020

25 days, did not check

B**n Mar 10, 2019

Not tested, yet. Good quality material, fast shipping.

Z**r Sep 07, 2018

Goods as described. Very fast shipping. I recommend this seller.



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INA228AQDGSRQ1 Datasheet PDF

Preliminary Specification INA228AQDGSRQ1 PDF Download


Buying Guide

  • What is the lifespan of INA228AQDGSRQ1?

    The lifespan of INA228AQDGSRQ1 depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of INA228AQDGSRQ1?

    You can find it with PDF Datasheet for INA228AQDGSRQ1 on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of INA228AQDGSRQ1?

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  • Can I purchase samples for testing?

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