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Product details

Parameters

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 80 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 1 Gain error (%) 0.25 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 110 Bandwidth (kHz) 3.5 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.35 Digital interface I2C, SMBus Features Alert Function, Bi-directional, Low-side Capable Resolution (Bits) 13 Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Current/voltage/power monitors

Package | Pins | Size

VQFN (RGV) 16 16 mm² 4 x 4 open-in-new Find other Current/voltage/power monitors

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C
      to 125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Senses Bus Voltages From 0 V to 26 V
  • Reports Shunt and Bus Voltage
  • High Accuracy:
    • Offset Voltage: ±80 µV (max)
    • Gain Error: 0.25% (max)
  • Configurable Averaging Options
  • Four Programmable Addresses
  • Programmable Alert and Warning Outputs
  • Power-Supply Operation: 2.7 V to 5.5 V
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Description

The INA3221-Q1 is a three-channel, high-side current and bus voltage monitor with an I2C- and SMBUS-compatible interface. The INA3221-Q1 monitors both shunt voltage drops and bus supply voltages, in addition to having programmable conversion times and averaging modes for these signals. The INA3221-Q1 offers both critical and warning alerts to detect multiple programmable out-of-range conditions for each channel.

The INA3221-Q1 senses current on buses that can vary from 0 V to 26 V. The device is powered from a single 2.7-V to 5.5-V supply, and draws 350 µA (typ) of supply current. The INA3221-Q1 is specified over the operating temperature range of –40°C to +125°C. The I2C- and SMBUS-compatible interface features four programmable addresses.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$75.00
Description

The INA3221EVM is a platform for evaluating the performance of the INA3221 under various signal, shunt, and supply conditions.

Features
  • USB Power and I/O
  • Small Form Factor
  • Simple Software Interface
  • GUIS FOR EVALUATION MODULES (EVM) Download
    SBOC425.ZIP (100553 KB)

    Software development

    CODE EXAMPLES & DEMOS Download
    SBOC424.ZIP (2520 KB)
    DRIVERS & LIBRARIES Download
    Linux Driver for INA3221
    INA3221SW-LINUX The Linux driver supports the INA3221 Triple Current/Power Monitor. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
    Linux Mainline Status

    Available in Linux Main line: Yes
    Available through git.ti.com: N/A

    Supported Devices:
    • ina3221
    Linux (...)

    Design tools & simulation

    SIMULATION MODELS Download
    SBOM761.ZIP (56 KB) - IBIS Model
    SIMULATION TOOLS Download
    SPICE-based analog simulation program
    TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
    document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    VQFN (RGV) 16 View options

    Ordering & quality

    Support & training

    TI E2E™ forums with technical support from TI engineers

    Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

    If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

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